Search for s 40 in Topics


Has electronics changed much since the 1970's? Answered

I have seen plenty of electronics books being offered over the internet dating from the '70s and '80s. I would like to ask the veterans if something in the science of electronics had changed much in 40 years (besides the digital aspect, of course).

Question by blkhawk    |  last reply


CB radio antenna question(s)....

I have a UHF CB radio in the car that is now quite outdated.Waiting for a 80CH replacement to arrive so the old one can be used as a fixed station in the house.Recently I made a new straight whip for the car as the fibreglass one snapped off.Now the problem I am facing is a total between reality and computer simulation.Here is what I did:Started with a straight steel wire on the elevated mounting - this spring mount is supposed to provide a ground plane as it was originally for a ground independent antenna.Simple math tells that a 1/2 Lambda whip should be around 33cm long, so I started with 40 and used my truted SWR meter.As it turned out my antenna was too short !?Tried again with a longer wire and got a good SWR reading of 1.09 with a total whip lenght of 49cm.As the elevated mount basically turns the entire antenna assembly into a vertical dipol I decided to simulate the thing in Mmangal.Should be straight forward, diameter and length of the ground rod, wire length and diameter for the actual whip.But with the same dimensions I have working fine on the car Mmangal tell me my antenna is totally out of whack.Calculated SWR is well over the 15 and the antenna is not anywhere near resonant in the 470MHz band.Mmangal is mainly for lower frequencies but shouldn't it work for the 70cm band as well?If I design the antenna as a classic ground plane with 3 or 4 radiating elements sloped at 42° I still get nowhere with my whip length.Since my SWR meter is correct and the antenna working really well I am wondering where my problem with Mmangal might be?Anyone here using it for 470MHz or with some insight on how to get the correct values for a vertical dipol antenna with a rod for ground and wire for the whip?

Question by Downunder35m  


IDE hard drive wont spin up in external array, using hacked power supply.....?

           So after building my new computer I had three old IDE 250gb and two 40gb hard drives.  I took some scrap aluminum and built a rack to mount the drives on. I hacked an old power supply and made a power supply for the drives. I bought 4 IDE to USB connectors and ran then into a USB hub. For some reason the power supply turns it self off a few seconds after plugging in the 250's. It will run the 40's no problem and the system instantly recognizes them.  The jumpers are all set to slave. When I individually try them with my single IDE to USB kit they work fine. 400w for just 5 drives should be more than enough power. Please help me out. Specs. Power Supply Antec-PA-412x 400W drives-250's WD2500-WD Caviar SE WD2500-WD Caviar Seagate Baracuda 7200.8 drives- 40's IBM Deskstar 40 WD400- WD Caviar  

Question by G-MAN75    |  last reply


Man builds amazing 1:40 scale LEGO Battleship + VIDEO !!

A Japanese man called Jun Brick has finished building a 1:40 scale replica model of the Japanese battleship "Yamato" .. out of LEGOOver 100,000 LEGO bricks were used in the construction !Back in 2007 Jun Brick posted photos showing the construction so i can only assume it took over 3 years to build.Photos of the construction and loads of the finished ship can be found on his Geo Cities page(Which is in Japanese so i cant read it :S)Below are a selection of the most impressive photos.Video is not all still images, it has some great panoramic views and walkarounds Via Wired

Topic by =SMART=    |  last reply


What lube would be best for a 3x3x3 rubik's cube? Answered

I have a rubik's cube, and I want to lubricate it. I have heard that the best, reliable lubricant would be silicon spray, but I have a lot of silicon heatsink compound that I'd like to use....would it make much difference? I also have WD-40...but that supposedly melts the cube, right?

Question by .Unknown.    |  last reply


Where to find old tube radios?

I am looking for old tube radios to collect and/or restore for fun. I have so far checked most of my local thrift stores about once a month for a while and I also checked a lot of local antique stores but found there prices to be ridiculously expensive for a beat up old radio. Now I am stumped as to where else to find these beutifull old radios loclaly, because the shipping for the heavy tube radios from E-bay can get incredibly exspensive as well. Anyone have any suggestions as to where to get them? I have already asked both my grandparents and my imediate family is keeping and open eye for them. Also if anyone knows of any good stores to buy this type of stuff in the DC/MD/VA area then I am open for that to.

Topic by jackillac92    |  last reply


If you had about 30 or 40 12v 7.2A Lead Acid batteries what could you do with them?

I am wondering if I should get these, they are free, so it;s more of a matter of wasting storage space and being unable to get -rid- of them if I can't use them for something practical. I've been meaning to make a little follower-bot, so I may have a use for about 6 of them at most...Any suggestions before I go and pick em up?

Question by Kasaron    |  last reply


Monster hunter

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Full combination list : +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1.Potion = Blue Mushroom + Herb 2.Mega Potion = Potion(1)+ Honey 3.Nutrients = Blue Mushroom + Godbug 4.Mega Nutrients = Nutrients(3)+ Honey 5.Antidote = Antidote Herb + Blue Mushroom 6.Herbal Medicine = Cactus Flower + Bitterbug 7.Max Potion = Mega Nutrients(4)+ Dragon Toadstool 8.Ancient Potion = Imunizer(10)+ Kelbi Horn 9.Catalyst=Bitterbug+Honey 10.Imunizer=Catalyst(9)+Dragon Toadstool 11.Power Juice=Catalyst(9)+Rare Steak 12.Mega Juice = Power Extract + Well Done Steak 13.Demondrug = Catalyst(9)+ Power Seed 14.Mega Demondrug = Pale Extract + Demondrug(13) 15.Armourskin = Catalyst(9)+ Armour Seed 16.Mega Armourskin = Pale Extract + Armourskin(15) 17.Poisoned Meat = Raw Meat + Toadstool 18.Tainted Meat = Raw Meat + Stunshroom 19.Drugged Meat = Raw Meat + Sleep Herb 20.Bomb Material = Stone + Sap Plant 21.Smoke Bomb = Bomb Material(20)+ Ivy 22.Flash Bomb = Bomb Material(20)+ Flashbug 23.Dung Bomg = Bomb Material(20)+ Dung 24.Paintball = Paintberry + Sap Plant 25.Gunpowder = Nitroshroom + Fire Herb 26.Small Barrel Bomb = Small Barrel + Fire Herb 27.Large Barrel Bomb = Large Barrel + Gunpowder(25) 28.Sonic Bomb = Gunpowder(25)+ Screamer 29.Net = Spiderweb + Ivy 30.Pitfall Trap = Net(29)+ Trap Tool 31.Tuna Bait = Worm + Yambug 32.Arrowana Bait = Cricket + Bughopper 33.Goldenfish Bait = Firefly + Snakebee Larva 34.Antiseptic Stone = Bitterbug + Earth Crystal 35.Lifecrystals = Godbug + Wyvern Fang 36.Lifepowder = Lifecrystals(35)+ Wyvern Claw 37.Health Flute = Lifepowder(36)+ Flute 38.Antidote flute = Antiseptic stone(34)+ Flute 39.Demon Flute = Mega Demondrug(13)+ Med Monster Bone 40.Armour Flute = Mega Armourskin(15) + Med Monster Bone 41.Normal S Lv2 = Huskberry + Needleberry 42.Normal S Lv3 = Huskberry + Rumblefish 43.Pierce S Lv1 = Huskberry + Velociprey Fang 44.Pierce S Lv2 = Huskberry + Pin Tuna 45.Pierce S Lv3 = Sm Bone Husk + Pin Tuna 46.Pellet S Lv1 = Huskberry + Scatternut 47.Pellet S Lv2 = Huskberry + Wyvern Fang 48.Pellet S Lv3 = Sm Bone Husk + Wyvern Fang 49.Crag S Lv1 = Huskberry + Burst Arrowana 50.Crag S Lv2 = Sm Bone Husk + Burst Arrowana 51.Crag S Lv3 = Lg Bone Husk + Bomb Arrowana 52.Clust S Lv1 = Huskberry + Bomberry 53.Clust S Lv2 = Sm Bone Husk + Wyvern Claw 54.Clust S Lv3 = Lg Bone Husk + Scatterfish 55.Disk S = Huskberry + Disk Stone 56.Recover S Lv1 = Huskberry + Herb 57.Recover S Lv2 = Huskberry + Potion(1) 58.Poison S Lv1 = Huskberry + Toadstool 59.Poison S Lv2 = Sm Bone Husk + Ioprey Fang 60.Stun S Lv1 = Huskberry + Stunshroom 61.Stun S Lv2 = Sm Bone Husk + Genprey Fang 62.Sleep S Lv1 = Huskberry + Sleep Herb 63.Sleep S Lv2 = Sm Bone Husk + Sleepyfish 64.Paint S = Huskberry + Paintberry 65.Antidote S = Huskberry + Antidote Herb 66.Demon S= Huskberry + Power Seed 67.Armour S = Huskberry + Armour Seed 68.Dragon S = Lg Bone Husk + Dragon Seed 69.Dung S = Huskberry + Dung Now dont ask for Items combinations anymore they all are here... once i get MHF I'll add the new ones if theres some

Topic by jellybean10122  


Should I pick up this old metal lathe? Answered

There's an older metal lathe that's going to the scrap yard, a reed-prentice co., looks to be from the 40's, and I could probably get it for scrap price. Would it be worth fixing up and using? I don't need to hit super-tight tolearances with it, just turning parts as a hobbyist / beginner. What questions should I ask about it? What should be there for it to be complete?

Question by Nate Cougill    |  last reply


Will the Waves ever Die?

Think about it, the age is the Digital Dawn of the day, anologue Television is already being planned to me completely removed from the air waves in 2009 to make way for the "supposedly" DIGITAL SUPURIOUR HD crap. I don't watch that much TV to begin with so it doesn't bother me. But what about FM radio, is that ever going to die? Chances are probably not for a few years, seeing how the AM spectrum is still kicking around. How long can our traditional ways last? I'd be fairly sad to see FM leave the game. Really, we've had radio since the dawn of the technical age, from the 40's through the 80's (remember the days?). I just wanna see what anyone else has to say.

Topic by Punkguyta    |  last reply


MotaBoi's K'nex Handgun

 Ok... this was originally meant to be a Desert Eagle and it looked pretty good... but it didn't shoot very well at all, that's why I didn't call it a Desert Eagle.  In the future (next week) i will make a replica that does shoot. Some features: 30 - 40+ ft range True trigger 8 round mag Sounds really cool CREDIT TO TRAUTS,  SUBSCRIBE TO HIM!!!  I USED HIS MECHANISM FOR THIS GUN.  A VIDEO WILL BE UP THIS WEEK AND INSTRUCTIONS ON THE WEEKEND!!!

Topic by MotaBoi    |  last reply


What is the best way to power this motor? Answered

I'm tempted to build an electric bike. I will be using a 4000W Hubzilla hub electric motor. I need about 100V and 80A at max. Batteries are really expensive, so what kind of battery(s) can I buy for under $600 that would match this motor and give me roughly 20 miles? I'm not incredibly worried about weight, but under 30-40 lbs would be superlative. Thanks!

Question by 007dna    |  last reply


Is it possible to make perfectly straight cuts with a jig saw?

I recently bought a 40 breeder tank and am working on a stand. I need to make about 19 perfect straight cut on 2x4's. I do not have a circular saw or table saw and the local hardware store does not make accurate cuts. Is there a jig I can make  to make perfect cuts with a jig saw. I was thinking like a box that guides the  2x4 and holds the jig saw in place.

Question by imthatguy1125    |  last reply


How do I intensify the spark on my Whirlpool gas stove igniters?

I have a Whirlpool gas stove. A few months ago a few of the spark igniters started to fail. When I discovered that they cost $30 to $40 to replace, I learned how to make my own. The igniters are not much more than a small copper tube soldered to a wire and imbedded in a clay cylinder. Here is my question: Is there a component that would be the opposite of a resister that would intensify the spark? My knowledge of electronics is rather limited. I will soon share this project on Instructables.

Question by wwlaveck    |  last reply


$600 Shapeways Printing Credit for $300

Hello all, I have acquired $600 in printing vouchers to Shapeways from a couple contests, they are actually divided into three separate vouchers of $100, $250, and $250. I'm sure I can find something awesome to use the money to print but as I'm in college now I could better spend this towards something else (books!!). I'd be willing to do %40 percent off for an individual voucher (so 60 for 100 or 150 for 250) or %50 percent off for all 3 together. Feel free to message me if interested. Thanks!

Topic by Patrick S    |  last reply


I guess you call this homework? Answered

BUT It isn't my home work. A friend Emailed me this and asked if I knew how to work it out. Th answer was no - do any one help - No teaching involved here my friend is in his 70's. A car engine has four camshafts each supported by three journal bearings. The engine runs at a maximum of 8000rpm, and the camshafts rotate at half engine speed. Assuming the engine oil to be 40 degrees - Determine the maximum power absorbed by the camshaft bearings. Other data given below journal bearing = 35 mm bearing axial length = 20 mm radial clearance = 0.018 mm oil grade = vg32 oil density = 890kg m   ̅³̇

Question by rickharris    |  last reply


Please Help for AutoLevel TronxyX5S

Hi, I apologize for the corrupt English first.I have a Tronxy X5S 3d printer. And I bought a sensor( SN04-N NPN) to add autolevel property to the printer. I thought I would be able to get rid of the small curves on the hotbed. I've arranged my commands according to autolevel as follows. But when I want to print a large shape, the extruder remains in the air at some points of the hotbed, print properly at some points, and at some points worth the hotbed(no filament output). So the autolevel property is not working properly. Can you help me? What am I doing wrong?My Marlin Configrution.h Changes//////////////////////////////////////////////////////////////////////////////////////////////////////////////#define AUTO_BED_LEVELING_BILINEAR//////////////////////////////////////////////////////////////////////////////////////////////////////////////#define X_PROBE_OFFSET_FROM_EXTRUDER -40 // X offset: -left +right [of the nozzle]#define Y_PROBE_OFFSET_FROM_EXTRUDER 20 // Y offset: -front +behind [the nozzle]#define Z_PROBE_OFFSET_FROM_EXTRUDER 0.5 // Z offset: -below +above [the nozzle]//////////////////////////////////////////////////////////////////////////////////////////////////////////////#define X_MIN_POS 0#define Y_MIN_POS 0#define Z_MIN_POS 0.6#define X_MAX_POS X_BED_SIZE#define Y_MAX_POS Y_BED_SIZE#define Z_MAX_POS 410//////////////////////////////////////////////////////////////////////////////////////////////////////////////#define GRID_MAX_POINTS_X 7 #define GRID_MAX_POINTS_Y GRID_MAX_POINTS_X//////////////////////////////////////////////////////////////////////////////////////////////////////////////////Set the boundaries for probing (where the probe can reach). #define LEFT_PROBE_BED_POSITION (20)#define RIGHT_PROBE_BED_POSITION (280) #define FRONT_PROBE_BED_POSITION (40)#define BACK_PROBE_BED_POSITION (320)************************************************** ***************************************My Repetier Host/CuraEngine Gcode Changes////////////////////////////////////////////////////////////////////////////////////////////////////////////// G21G90M82M107G92 Z0G1 Z5G28G29G28 X0 Y0G28 Z0G1 Z15.0 F9000G92 E0G1 F200 E3G92 E0G1 F9000{IF_BED}M190 S{BED}{IF_EXT0}M109 T0 S{TEMP0}Please watch my problem

Topic by BurakD22  


which potentiometer to use for time lapse motor

I was looking at a camera slider and this motor for a time lapse slider: http://www.amazon.com/gp/product/B00436ULLA/ref=ox_sc_act_title_6?ie=UTF8∣=AUUK2J4ODEV5F I read somewhere online that someone used a rotisserie motor and hooked it up to a camera slider for a time lapse of about 40 minutes, but if I wanted to make the motor move even slower for a longer time lapse, can I hook up a potentiometer somewhere in the rotisserie motor? If so, what type of potentiometer should I get? Would this work: http://www.amazon.com/Parts-Express-10K-Ohm-Potentiometer/dp/B0002KRE20/ref=sr_1_1?s=industrial&ie;=UTF8&qid;=1355018144&sr;=1-1&keywords;=potentiometer

Topic by dylanp1936    |  last reply


Building a strong electromagnet, need advice Answered

Hi trying to understand how to build an electromagnet It must be 38-40 kg strong, and powered by 1,5-3v rechargeable batteries (operating for at least few years) and using as few amp as possible, it will be switched on and off 1-2 times per sec I know that it's possible cause it exists already; http://www.grainger.com/product/2KFP1?gclid=CjwKEAiAxNilBRD88r2azcqB2zsSJABy2B96VIJ19MORYbL2E3XKvdOrg6bK6_U-Ko7P7ZAGq3_UqRoC5Kvw_wcB&cm;_mmc=PPC:GOOGLEPLAA-_-Security-_-Locking%20Systems-_-2KFP1&ef;_id=VLan-gAAACg-Rw6I:20150114173308:s Mine just needs to be a little stronger and work 24/7 I would be thankful if you could propose any other source of constant energy (to replace the batteries) or a solution to make them last longer

Question by Maxc13    |  last reply


My computer locks up with an audio loop, help! Answered

I recently upgraded my hardware (I put in two 8600 GT's in SLI, and an E6850, both used), and shortly after, my games began to lock up. Whatever was on the screen would stay there, and the last second of audio would loop. The only way to get out of it was a hard reset. Then I noticed when I unplugged my other two hard drives, games wouldn't freeze up anymore. So I replaced my 400 watt PSU with a 550 watt, with 50 amps on the 12 volt rails. Everything seemed to clear up, until today, when I was browsing Newegg and listening to Audioslave (not very resource intensive), and it locked up with the same symptoms for no apparent reason. I'm getting worried now, as I shelled out 75 bucks for a decent PSU and the same stuff is happening. My CPU idles in the upper 30's to lower 40's, and peaks at 60 C in games. I know it's a bit toasty, but it shouldn't be hot enough to cause this sort of problem, right? So if anyone has any ideas about what's going on, any help is appreciated.

Question by RelaxedSoup    |  last reply


blutooth telephone

Hi people who are smarter than me! I have been searching the great Google for the past while and I cannot find something that does this. I love the portability of cellphones and i love the look an feel of landlines (you cannot beat the look of a phone on a a desk. What I want is a device that connects to my cellular telephone wirelessly and that a landline can plug into. This means that it must supply about 40 - 60 VDC to power an old phone that DOES NOT HAVE EXTERNAL POWER SUPPLY so it could operate a touch tone phone from the 80's and 90's. When I get a call on my phone I want it to ring the phone. When I pick up the handset I want it to answer the call and allow me to talk to the person. When I place a call I want to be able to pick up the handset and then dial a 10 digit number and then it place the call through my cell phone. During the call I want to be able to press a number on the landline and for it to press that number on my phones keypad. when i put the handset down i want it to hang up. Is this even possible? can it be done? let me know! Thanks! scott 

Topic by ScottB7    |  last reply


Vintage Dental Tools

I stopped by the White Elephant Sale in Oakland a few days ago and picked up a a really old set of dental equipment. At home dentistry has long been a dream of mine, and now I have the tools to make it a reality. Its got two different dental style flood lights on nice swing arms, the spittoon sink thing, a Mr. Thirsty, a belt driven articulated dental drill, the tray on the arm, the thing that fills up the little cup of water and the air/water gun that dentists like to use so much. The water and air connections are included, but not much of it currently works. The equipment is set up outside of my room in my shop, and to be honest, it kind of freaks me out every time I walk by it. If anyone has any ideas on how to repurpose any of this stuff besides making a renegade dentists office/torture device I would love to hear them. Also, if anyone knows anything about how to restore these kinds of things, it would be great to get some pointers. Its made by a company called Weber and its got to be from at least the 40's or 50's if not older.I'm most excited about the articulated belt driven drill - I have never seen anything quite like it!

Topic by noahw    |  last reply


What a good night

Yes the semester is finally over, I got a B in stats and should, possibly get a B in statics. I was actually fairly comfortable with the final, however that doesn't mean much. Right before the test, he states that being multiple choice, if your choices are 2,3,4,5 for example, that doesn't mean the right answer isn't 40, and then you would select 5. AGGHH! But for better or worse, it's over, now I can start refinishing my rifle, started right after I walked in the door and kissed my wife, and to top off the evening, I scored a 70's vintage sewing machine from the neighbors garbage, for parts, I haven't rebuilt the serger I found years ago, too many backed up projects. And the xmas party season starts tomorrow.

Topic by Tool Using Animal    |  last reply


12v battery indicator with flashing leds showing state of charge when recharcing

Hi guys. I have a 12v lead-acid battery and i want to make a circuit, which can show me state of charge of the battery with 5 (blue or white) leds. When the battery is in use, it should light up all 5 leds at 100%, 4 at 80%, 3 at 60%, 2 at 40% and 1 at 20%.Now when i want to charge the battery i would like them to light up in order, as it gets recharged. Lets say it has 0% capacity left and i plug in the charger, the first led should start flashing/blinking. When the battery has charged to over 20%, the first led should turn solid and the second led should start flashing, which indicates that the battery has recharged somewhere in between 20-40% battery life. This goes on until it has reached 100% and all leds should light up solid. When the battery is in use (no charger plugged in) the leds should flash like this, just turn off as explained in first.Furthermore i would like to add a switch, which can turn on/off the indicators (but not the battery and charger itself)To see what i mean, i saw that soundboks, has added this feature in their batteryboxes: https://www.youtube.com/watch?v=rlY8B2dHYD4 (watch 0:50)Is this something someone can help me with?

Question by SimonR223    |  last reply


Mk 219 fuze container value? Answered

I got this today at goodwill for $2.68 USD From what i got off the label Its some sort of ammo can for mk 219-3 fuze. Made by Nash-Kelvinator (automobile meets refrigerator) in 1943.  I know in the 40's everyone was into the war effort so its not that strange that an appliance/auto company would be making bomb fuzes. the MARK designation means Navy. My question, i picked this up to utilize as a small box for my smaller tools. Its in really good condition for being 68 years old. The inside is only scratched where the fuzes would have been rubbing the paint. (almost as if it contained live ordnance up until now). I checked ebay and havent seen any of these online.  Anyone have any idea how much its worth or rarity?(if its worth more than a tool box ill just sell it and buy a nice craftsman or something)

Question by thematthatter    |  last reply


Red dot scopes: I cant quite chose Answered

I am looking to buy a red dot scope, nothing too pricey, but nothing too crappy either. I am buying it off of amazon along with my vest, and i am stuck between 2. the first one is a barska on the following link:   http://www.amazon.com/Barska-Short-Tube-Gun-Sight/dp/B002QEXJH4/ref=sr_1_236?s=sporting-goods&ie;=UTF8&qid;=1286397649&sr;=1-236 the other one is also a barska, and is on this link:   http://www.amazon.com/BARSKA-Red-Dot-42mm-Riflescope/dp/B001JJCHY8/ref=pd_ybh_10?pf_rd_p=280800601&pf;_rd_s=center-2&pf;_rd_t=1501&pf;_rd_i=ybh&pf;_rd_m=ATVPDKIKX0DER&pf;_rd_r=0EQE4AP7X4QRM4CRR1SF If you could look at both and help me chose, or suggest another red dot scope between $30 - 40.  If you own either of them, please tell me what you think of it. If possible, i would like to know if either of them need a riser mount to clear the m4 front sights

Question by predatory meatball    |  last reply


How can i install Windows XP on my Laptop without Working CD-ROM? Answered

My Laptop is A Dell Inspiron 6000,It supports Booting from the USB port,IDE to USB Cd drives do not work,I have a 2GB Flash Drive,a 1 GB flash Drive and a 128MB Flash drive,they are all capable of booting off of from the USB on my laptop. I also Have the windows XP Setup CD,Windows XP Home and Pro. I also Have a hardrive,About 40 GB,But all i want is to Start up the XP setup from My flash drive/s After that,I can figure out the Rest. Also,Try to keep it in the Free side,i have An extremely Limited Budget,And cannot buy anything. Thanks ~ReCreate Edit:Thanks to ZEROGX,I have setup XP on my laptop,And now am posting in it,Take a look at my fresh install.

Question by ReCreate    |  last reply


DIY Buddha Machine / loop player / audio file player

I've been thinking a lot about FM3's Buddha Machine www.fm3buddhamachine.com/. Here's the short description from Wikipedia: The Buddha Machine is a small musical loop player. ... It continuously plays one of 9 ambient sound loops that range in length from 5 to 40 seconds. This seems like a relatively simple device, so wanted to see if anyone in the community had ideas about how to DIY one of these. I really only want it to play a single loop, but I'd like it to be a long loop. Project comprises an enclosure, battery power, speaker, and a way to hold and play the audio file. Thought of modding a digital recorder like you would use to take notes, but this seems really expensive. It's very important that this be as low cost as possible. I'm very good at building things, but conceptually I don't really know what's out there as far as programmable components to hold and play the audio file. Does anyone have any ideas?

Topic by kircaldy    |  last reply


Why do Microsoft games lag like crazy on my computer?

Recently I have become aware that any Microsoft game that I have on my computer runs with unbearable lag. At first I though that Halo 1 and 2 just hated me, but I've noticed that Age of Empires 3 does it as well. What's interesting about this is that I'm getting a high FPS in games (30's and 40's lowest, usually around 50 and up) but it still lags. I think the best way to describe the framerate would be to call it "jumpy", it never stays stable, but instead rapidly bounces about 5 FPS in either direction. However, things really started to get interesting when I tried to record a video with Fraps to show what was happening. I hit the record button and... suddenly the lag goes away. Go figure. So, I think recording with Fraps has a smoothing effect on the framerate, because the FPS suddenly becomes very consistent. I'd just record video all the time, except that it would eat up all of my disk space :(. So, does anybody have any ideas on a solution? Some sort of framerate smoothing software perhaps? Oh, by the way, here's my specs: -E6850 @ 3.0 Ghz -2 GiB DDR2 800 RAM -Two 8600 GT's in SLI -Asus P5N-E SLI motherboard -Various SATA drives that I've scrounged -Windows Vista 32-bit I can run most games maxed out (or close to it) except for Crysis and Far Cry 2, of course :).

Question by RelaxedSoup    |  last reply


Gravity Lamp, the LED lamp powered by gravity

A Virginia Tech student designed an LED lamp that is powered by gravity. It is called the Gravia, and it took second place at the Greener Gadgets competition in NYC. Gravity as a renewable energy source? Amazing!From http://pesn.com/2008/02/19/9500471_Gravity_Lamp/Concept illustrations of Gravia depict an acrylic column a little over four feet high. The entire column glows when activated. The electricity is generated by the slow fall of a mass that spins a rotor. The resulting energy powers 10 high-output LEDs that fire into the acrylic lens, creating a diffuse light. The operation is silent and the housing is elegant and cord free – completely independent of electrical infrastructure.The light output will be 600-800 lumens – roughly equal to a 40 watt incandescent bulb. Each drop of the gravity mechanism runs the light over a period of four hours.To "turn on" the lamp, the user moves weights from the bottom to the top of the lamp. An hour-glass like mechanism is turned over and the weights are placed in the mass sled near the top of the lamp. The sled begins its gently glide back down and, within a few seconds, the LEDs come on and light the lamp, Moulton said. “It’s more complicated than flipping a switch but can be an acceptable, even enjoyable routine, like winding a beautiful clock or making good coffee,” he said.Moulton estimates that Gravia’s mechanisms will last more than 200 years, if used eight hours a day, 365 days a year.The winner of the Greener Gadgets competition was the Enerjar.

Topic by Brennn10    |  last reply


Lots of electronic parts FOR SALE - super cheap!

 Hi,  I  have a surplus of electronic components left over from when I worked with my dad. We built stroller vending machines for shopping malls. some of the parts are kind of specific to vending machines (bill acceptors and coin hoppers), however some of the parts can have infinite uses in the hands of the instructables community. I will list what I have and please feel free to email me with any questions. I can send photos upon request. All  of these parts are brand new in the box. I live in the chicagoland area. You can email me at Kellensmetalart@comcast.net.  Check out my metal sculpture at Kellensmetalart.blogspot.com Coinco bill acceptor Mag50B - $60 ea. (27 available) Crouzet 30amp 50V relay - $7 ea. (330 available) Money Control coin hopper / part # 40-4600-78 - $50 ea. (26 available) Meanwell power supply (240w 48V 5A) / part # S-240-48 - $75 ea. (25 available) Idec power supply (50w 24V 2.1A) / part # PS5R-D24 21 - $40 ea. (20 available) Idec I/O (20 terminal breakout module) / part # BX1D-S20A - $8 ea. (72 available) Idec I/O (26 terminal breakout module) / part # BX1D-S26A - $10 ea. (23 available) Aromat reset counter / part # LC2H-F-DL-2KK-B   - $25 ea. (20 available) Microsmart PLC (output module) / part # FC4A-T16S3   - $45 ea. (27 available) Microsmart PLC (input module) / part # FC4A-N32B3   - $55 ea. (35 available)

Topic by KellenB    |  last reply


I'm thinking of selling my telescope of eBay, would you buy it? Answered

I'm selling an orion starblast 4.5" telescope: www.google.ca/imgres?imgurl=http://eridanusoptics.com/store/images//telescopes/eqmounted/OR9798.jpg&imgrefurl;=http://eridanusoptics.com/store/index.php%3Fmain_page%3Dproduct_info%26products_id%3D333&usg;=__fD6BTgmBfp6XqGZOFCZIjfwgw0o=&h;=500&w;=500&sz;=40&hl;=en&start;=0&zoom;=1&tbnid;=kScIj7bBieqngM:&tbnh;=149&tbnw;=149&prev;=/images%3Fq%3Dorion%2Bstarblast%2B4.5%26um%3D1%26hl%3Den%26client%3Dfirefox-a%26sa%3DN%26rls%3Dorg.mozilla:en-US:official%26biw%3D1280%26bih%3D768%26tbs%3Disch:1&um;=1&itbs;=1&iact;=hc&vpx;=347&vpy;=69&dur;=432&hovh;=225&hovw;=225&tx;=135&ty;=88&ei;=K5Z1TJiLOoOC8gb54r3yBQ&oei;=K5Z1TJiLOoOC8gb54r3yBQ&esq;=1&page;=1&ndsp;=25&ved;=1t:429,r:1,s:0 It also comes with a 25mm eyepiece and a 10mm eyepiece and also a x2 barlow lense. The price I am going for is $350, tell me if you would buy it or not.

Question by solarblade90    |  last reply


Office Warfare Book on Sale Now

Spending all day in a cubicle is a lot like a war of attrition between you and the clock, with skirmishes against neighbouring tribes to establish dominance. While we haven't yet figured out a way to speed up time to get your out of your white-collar jail, we do have a handy book that could make your hours under fluorescent light s little more enjoyable. Presenting, Office Weapons: Projects to Fortify Your Cubicle A collection of over 40 projects made by YOU, members of Instructables, that you can create in your cubicle from easily sourced office supplies. There's grappling hooks, trebuchets, darts and more - all made out of office supplies! We've even included some fun non-warfare projects at the end to keep you entertained in times of peace. Check out the projects that are in the book, then head over to ThinkGeek or Amazon to grab a copy for yourself. If all else fails, you can always use the book as a shield from your cubicle neighbour (who has already purchased this book and is arming himself as you read this).

Topic by mikeasaurus  


What battery should I use to power a DIY boombox using car audio components? Answered

I've been looking at car stereo boomboxes (DIY of course) and had a simple question on how to power the stereo: WHAT BATTERY SHOULD I USE? I plan on running a Kicker ZX300.1 mono amplifer to power three 4ohm SVC subwoofers (wired down to 1.53 ohms), and a wallmart headunit that I suspect draws around 10amps of power connected to Kicker DS60's. I'm also fairly certain that the amplifier draws 30 amps of power (300 watts / 10 = 30amps). If this is correct does that mean I need to have a battery / set of batteries rated at 40 Ah? (I know I need a minimum 12v to run car audio equipment, the question is based on the Amps Per Hour rating of the battery). I Guess what I am asking is does the power source need to be rated at the "x" Amps/Hour where "x" = the total amp draw of the system? Thanks!

Question by ashap517    |  last reply


XYZ Recumbent Trike

So I've been wanting a recumbent bike to help me get in shape. I'm far enough out of shape that a standard bike is uncomfortable to the point of being a deterent. The biggest obstacle to me is the price. Even the Terra Trike which is supposed to be an affordable, entry level option is almost a grand even bare bones. I tried looking on craigslist but even used ones rarely dip below 800. So I looked for something I could diy. My biggest obstacle on that front is I don't own, or know how to use a welder. I think I've found something promising though.  There is a group in The Netherlands called N55. They are sort of a engineering/art collective and they focus on things to improve modern life. One of the projects they have out there is their XYZ Vehicles. They are pedal powered vehicles designed so that they can be put together with a minimum of tools. All that really should be needed is a power drill, some wrenches and a metal saw. From what I understand, they do classes where they build the 2 upright versions, the bakfiet and the tadpole design with the cargo box, but these are all over in europe and I am in Arizona so... I haven't been able to find anyone as of yet who has made one of the recumbents here in the states and posted about it. I would love to do this and post it as an instructable but I need some help. All of the materials list is metric and while I personally think a base-10 system makes a heck of a lot more sense that what we call standard measurements, I'm still not familiar with metric. So my question to the community is, should I convert all the measurements to standard or is there someplace i can buy these materials from here in the states in metric sizes? B I L L O F M A T E R I A L S : B O L T S & N U T S M6 SELFLOCKING NUTS, stainless (DIN985) - ca. 150 pieces (TWOSEATER: 200 pieces) M8 SELFLOCKING NUTS, stainless (DIN985) - ca. 5 pieces (TWOSEATER: identical) M8 NUTS NORMAL, stainless - ca. 5 pieces (TWOSEATER: identical) M6 and M8 BOLTS with Hexagon head, stainless, (DIN931): 6mm x 140 mm - ca. 2 pieces (TWOSEATER: 3 pieces) 6mm x 90 mm - ca. 15 pieces (TWOSEATER: 20 pieces) 6mm x 90 mm - ca. 5 pieces in DIN 933 (full thread) (TWOSEATER: identical) 6mm x 60 mm - ca. 60 pieces (TWOSEATER: 120 pieces) 6mm x 65 mm - ca. 10 pieces (TWOSEATER: identical) 6mm x 40 mm - ca. 25 pieces (TWOSEATER: identical) 8mm x 120mm, 2 pieces (TWOSEATER: identical) 8mm x 100mm, 2 pieces (TWOSEATER: identical) M6 WASHERS - ca. 300 pieces (TWOSEATER: 400 pieces) M8 WASHERS - ca. 10 pieces (TWOSEATER: identical) A L U M I N U M 2x25x25mm ALUMINIUM SQUARE TUBE: 15m (TWOSEATER: 34m) 3x30x30mm ALUMINIUM SQUARE TUBE: 1m (TWOSEATER: 2.5m) 4x60mm ALUMINIUM FLAT: 1m (TWOSEATER: identical) 2x22mm ALUMINUM ROUND TUBE Ø 22mm: 1m P L A S T I C S 3x880x340mm POLYCARBONATE SHEET (TWOSEATER: 2 times) ENDCAPS (PE), black, for 2x25x25 tubing: ca. 70 pieces (TWOSEATER: 100 pieces) ENDCAPS (PE), black, for 3x30x30 tubing: ca. 10 pieces (TWOSEATER: 15 pieces) POM or PE black, round Ø 25mm: ca. 0,3m (TWOSEATER: 0,5m) POM or PE black, square 21x21mm: ca. 0,6m (TWOSEATER: 0,5m) POM or PE WASHERS M8: ca. 20 pieces (TWOSEATER: identical) M I S C E L L A N E O U S AXIAL NEEDLE BEARINGS M8: 4 pieces (TWOSEATER: identical) NYLON SPHERE w. screwthread, black, diameter 50mm: 2 pieces (TWOSEATER: identical) NYLON RIBBON, black, width 25mm, for seat side support: 1,7m (TWOSEATER: 3,5m)

Topic by dark8587    |  last reply


What is my bottleneck? Answered

I just recently built a new gaming machine, and have been running into a bottleneck issue. I was wondering if anyone could give me some advice.  My Specs: Windows 7 Ultimate MSI GD-55 Z-77a Motherboard Intel i5 3570k OC 4.2 Ghz Radeon HD 5770 x2 (Crossfire) 16Gb (4x4) Corsaire 1600Mhz RAM 1 Tb 7200rpm Western Digital HDD 850w Coolermaster PSU I have downloaded the most recent AMD drivers and Crosssfire Profiles. The problem I am having, is that I almost never see anything in my computer running at max while gaming. I will usually have my GPUs running at around 60-70%, and none of my CPU cores running higher than 50-60%.  The first thing that came to my mind was temperature. However my CPU never gets hotter than 65c, and my GPUs never hotter than 80c.  The other thing that I thought of was a possible lack of power. But 850w is at least 40% more than recommended for my system specs. To test this, I did a CPU benchmark, and a GPU benchmark at the same time, both hit 100% usage, and my computer did not lose power. (nor did anything get too hot) After ruling Temperature and power out, I thought maybe it was my RAM. However, I have read multiple places that it is nearly impossible for any game to max out quad channel memory bandwidth. I have more than enough of better-than-average RAM, storage isn't the issue. So I doubt its my RAM. But I am no expert. I then ran "Windows Resource monitor" to watch my HDD Disk usage. While gaming, nothing transferred more than a couple Mb/S. The specific specs of my HDD include a 64MB Cache, and a  6.0Gb/s Data transfer rate. My Motherboard also supports 6Gb/s Transfer rates. So I doubt its my HDD. I know my GPUs are 2 generations old, but if they were the bottleneck they would be running at 100% (or at least higher than 80%) Now I don't know what to think, except that its maybe software related. But I cannot think of anything specific that would do this sort of thing. Any suggestions?  

Question by schwerlin    |  last reply


Looking For Instructors - Circuit Bending, Creative Electronics, Arts, Crafts, Painting, etc... (Williamsburg, Bk)

NO EXPERIENCE NECESSARY - Just be EXCELLENT at what you do, and be able to teach others your skill(s)! We are seeking p/t instructors for various classes to be held at our location. We are looking for instructors who are knowledgeable, creative, patient, and experienced (either professional or self-taught) in the classes they will be teaching. Hours vary, but primarily consist of evening and weekend scheduling.  Pay is based on level of experience, class type, and class schedule (ranges from $40-100/hr). - Circuit Bending (Basics to Advance) - Creative Electronics (Basics to Advance) - Arts & Crafts (all levels) - Electronic Repairs / Service / Test / Troubleshoot (Basics to Advance) - Painting - Sewing / Embroidery - Jewelry Design / Silversmithing - Printmaking (lithography, dies, monoprinting, etc) You get the picture! We are conveniently located in the Williamsburg Brooklyn (Broadway @ Marcy Ave), @ the Marcy Ave J, M, Z stop. Please include the class you'd like to teach, your experience level, relevant degrees (not required, but a +), affiliations, any resumes/cv (professional and/or self taught) and a simple sample curriculum (can by on anything).  We also need to know your availability, and salary requirements. Thank you for your interest. TERMiNAL 347.725.0343 terminalbrooklyn (at) gmail . com

Topic by terminalbrooklyn    |  last reply


Big Band Music Stands

I am the leader of a 17 Piece Big Band. Just like Glenn Miller or Harry James, I need to find a way to make some inexpensive but deco looking music stands. In the old days, they used to make them in all types, sizes and styles. Today, they have one kind. I would like to find a way to make some myself that can fold up and be transported fairly easily. If you have an idea of how to do this, I would love to hear from you. Please feel free to email me if you have questions. The stand should be in two parts, the base and the shelf. The shelf should sit on the base. The shelf should also have a lip for the music to sit on without sliding off. The total height of the back of the stand should be 36". The height of the front of the stand, where the music sits, should be approx 29". The width of the top portion, the part that holds the music, should be 22". The lip should be 3 to 31/2 inches. The base will vary depending on style and shape. I look forward to anyone who thinks they have a way to make these. They need to be strong enough not to blow away in wind, yet easy to fold and carry. After all, I will be moving 17 of them each time I perform. As far as the style, well, the more art deco looking the better. If I could have anything I wanted without the worry of cost, I would choose stands that looked like the front of a car from the 1930's and 40's. It would look as though it had a grill in front along with the large round lights, perhaps a cap on the radiator, large wide fenders and whitewall looking tires on the side. Now, that is just my if I could have anything idea. reality says a simple square or perhaps v shaped stand. Solid colored, perhaps made from corrugated plastic. Thanks for looking and giving this some thought. Blessings! Ashley ideas@mrlivemusic.com

Topic by MrMusic    |  last reply


new to arduino, want to run a dual display for 2 sensors

I'm new to the Arduino community.  wanting to set up a dual radar setup with 2 ultrasonic sensors,  (Ultrasonic Sensor Module HC-SR04), and outputting to a pair of 7 segment displays ( two 7 segment displays each).  I've found a code to do a single could use a lot of help to output two at the same time, basically 2 lanes without 2 units.  im using an arduino mega, ordered a unor3 and hopefully it can be made to run on one or the other. code is as follows: /* HC-SR04 Sensor    The circuit:     * VCC connection of the sensor attached to +5V     * GND connection of the sensor attached to ground     * TRIG connection of the sensor attached to digital pin 2     * ECHO connection of the sensor attached to digital pin 4  */    /*  This is a radar ping sensor that calcultates the speed of an  object traveling away or towards the sensor. I took some of this  code for the HC-SR04 Sensor implementation by Tautvidas Sipavicius. The rest  is original code from me. I know that the seven segment display  code is not the best to look at or the most optimized but it  serves its purpose just fine and is easy to understand.    Written by Matthew Ladd  */   const int trigPin = 2; const int echoPin = 4;   void setup() {   // initialize serial communication:   Serial.begin(9600);   //First 7 segment (ones place)   pinMode(30,OUTPUT);//F   pinMode(31,OUTPUT);//G   pinMode(32,OUTPUT);//E   pinMode(33,OUTPUT);//D   pinMode(34,OUTPUT);//C   pinMode(35,OUTPUT);//B   pinMode(36,OUTPUT);//A   //Second 7 segment (tens place)   pinMode(37,OUTPUT);//F   pinMode(38,OUTPUT);//G   pinMode(39,OUTPUT);//E   pinMode(40,OUTPUT);//D   pinMode(41,OUTPUT);//C   pinMode(42,OUTPUT);//B   pinMode(43,OUTPUT);//A } void zerofirst(){   digitalWrite(30,LOW);   digitalWrite(31,HIGH);   digitalWrite(32,LOW);   digitalWrite(33,LOW);   digitalWrite(34,LOW);   digitalWrite(35,LOW);   digitalWrite(36,LOW); } void onefirst(){   digitalWrite(30,HIGH);   digitalWrite(31,HIGH);   digitalWrite(32,HIGH);   digitalWrite(33,HIGH);   digitalWrite(34,LOW);   digitalWrite(35,LOW);   digitalWrite(36,HIGH); } void twofirst(){   digitalWrite(30,HIGH);//F   digitalWrite(31,LOW);//G   digitalWrite(32,LOW);//E   digitalWrite(33,LOW);//D   digitalWrite(34,HIGH);//C   digitalWrite(35,LOW);//B   digitalWrite(36,LOW);//A } void threefirst(){   digitalWrite(30,HIGH);//F   digitalWrite(31,LOW);//G   digitalWrite(32,HIGH);//E   digitalWrite(33,LOW);//D   digitalWrite(34,LOW);//C   digitalWrite(35,LOW);//B   digitalWrite(36,LOW);//A } void fourfirst(){   digitalWrite(30,LOW);//F   digitalWrite(31,LOW);//G   digitalWrite(32,HIGH);//E   digitalWrite(33,HIGH);//D   digitalWrite(34,LOW);//C   digitalWrite(35,LOW);//B   digitalWrite(36,HIGH);//A } void fivefirst(){   digitalWrite(30,LOW);//F   digitalWrite(31,LOW);//G   digitalWrite(32,HIGH);//E   digitalWrite(33,LOW);//D   digitalWrite(34,LOW);//C   digitalWrite(35,HIGH);//B   digitalWrite(36,LOW);//A } void sixfirst(){   digitalWrite(30,LOW);//F   digitalWrite(31,LOW);//G   digitalWrite(32,LOW);//E   digitalWrite(33,LOW);//D   digitalWrite(34,LOW);//C   digitalWrite(35,HIGH);//B   digitalWrite(36,LOW);//A } void sevenfirst(){   digitalWrite(30,HIGH);//F   digitalWrite(31,HIGH);//G   digitalWrite(32,HIGH);//E   digitalWrite(33,HIGH);//D   digitalWrite(34,LOW);//C   digitalWrite(35,LOW);//B   digitalWrite(36,LOW);//A } void eightfirst(){   digitalWrite(30,LOW);//F   digitalWrite(31,LOW);//G   digitalWrite(32,LOW);//E   digitalWrite(33,LOW);//D   digitalWrite(34,LOW);//C   digitalWrite(35,LOW);//B   digitalWrite(36,LOW);//A } void ninefirst(){   digitalWrite(30,LOW);//F   digitalWrite(31,LOW);//G   digitalWrite(32,HIGH);//E   digitalWrite(33,HIGH);//D   digitalWrite(34,LOW);//C   digitalWrite(35,LOW);//B   digitalWrite(36,LOW);//A } void zerosecond(){   digitalWrite(37,LOW);   digitalWrite(38,HIGH);   digitalWrite(39,LOW);   digitalWrite(40,LOW);   digitalWrite(41,LOW);   digitalWrite(42,LOW);   digitalWrite(43,LOW); } void onesecond(){   digitalWrite(37,HIGH);   digitalWrite(38,HIGH);   digitalWrite(39,HIGH);   digitalWrite(40,HIGH);   digitalWrite(41,LOW);   digitalWrite(42,LOW);   digitalWrite(43,HIGH); } void twosecond(){   digitalWrite(37,HIGH);//F   digitalWrite(38,LOW);//G   digitalWrite(39,LOW);//E   digitalWrite(40,LOW);//D   digitalWrite(41,HIGH);//C   digitalWrite(42,LOW);//B   digitalWrite(43,LOW);//A } void threesecond(){   digitalWrite(37,HIGH);//F   digitalWrite(38,LOW);//G   digitalWrite(39,HIGH);//E   digitalWrite(40,LOW);//D   digitalWrite(41,LOW);//C   digitalWrite(42,LOW);//B   digitalWrite(43,LOW);//A } void foursecond(){   digitalWrite(37,LOW);//F   digitalWrite(38,LOW);//G   digitalWrite(39,HIGH);//E   digitalWrite(40,HIGH);//D   digitalWrite(41,LOW);//C   digitalWrite(42,LOW);//B   digitalWrite(43,HIGH);//A } void fivesecond(){   digitalWrite(37,LOW);//F   digitalWrite(38,LOW);//G   digitalWrite(39,HIGH);//E   digitalWrite(40,LOW);//D   digitalWrite(41,LOW);//C   digitalWrite(42,HIGH);//B   digitalWrite(43,LOW);//A } void sixsecond(){   digitalWrite(37,LOW);//F   digitalWrite(38,LOW);//G   digitalWrite(39,LOW);//E   digitalWrite(40,LOW);//D   digitalWrite(41,LOW);//C   digitalWrite(42,HIGH);//B   digitalWrite(43,LOW);//A } void sevensecond(){   digitalWrite(37,HIGH);//F   digitalWrite(38,HIGH);//G   digitalWrite(39,HIGH);//E   digitalWrite(40,HIGH);//D   digitalWrite(41,LOW);//C   digitalWrite(42,LOW);//B   digitalWrite(43,LOW);//A } void eightsecond(){   digitalWrite(37,LOW);//F   digitalWrite(38,LOW);//G   digitalWrite(39,LOW);//E   digitalWrite(40,LOW);//D   digitalWrite(41,LOW);//C   digitalWrite(42,LOW);//B   digitalWrite(43,LOW);//A } void ninesecond(){   digitalWrite(37,LOW);//F   digitalWrite(38,LOW);//G   digitalWrite(39,HIGH);//E   digitalWrite(40,HIGH);//D   digitalWrite(41,LOW);//C   digitalWrite(42,LOW);//B   digitalWrite(43,LOW);//A } long distanceOverTime(long first,long second){  return ((first-second)/.1)*.0223693629;//taking cm/s to mph } long holder;//store the cm from last time through loop. long temp;//used to store the speed value after changes int counter; void loop() {   // establish variables for duration of the ping,   // and the distance result in inches and centimeters:   long duration, inches, cm;   int tens;   int ones;   long Speed;   // The sensor is triggered by a HIGH pulse of 10 or more microseconds.   // Give a short LOW pulse beforehand to ensure a clean HIGH pulse:   pinMode(trigPin, OUTPUT);   digitalWrite(trigPin, LOW);   delayMicroseconds(2);   digitalWrite(trigPin, HIGH);   delayMicroseconds(10);   digitalWrite(trigPin, LOW);     // Read the signal from the sensor: a HIGH pulse whose   // duration is the time (in microseconds) from the sending   // of the ping to the reception of its echo off of an object.   pinMode(echoPin, INPUT);   duration = pulseIn(echoPin, HIGH);     // convert the time into a distance   inches = microsecondsToInches(duration);   cm = microsecondsToCentimeters(duration);   Speed=distanceOverTime(holder,cm);   holder=cm;//after speed caclulation so take the cm value for another calculation   Speed=abs(Speed);   if(Speed!=0 || counter==10){     temp=Speed;     counter=0;   }else{     counter++;   }   if(temp>=100){    zerofirst();    zerosecond();   }else{     ones=temp%10;     tens=temp/10;   }   if(ones == 0){     zerofirst();   }else if(ones==1){     onefirst();   }else if(ones==2){     twofirst();   }else if(ones==3){     threefirst();   }else if(ones==4){     fourfirst();   }else if(ones==5){     fivefirst();   }else if(ones==6){     sixfirst();   }else if(ones==7){     sevenfirst();   }else if(ones==8){     eightfirst();   }else if(ones==9){     ninefirst();   }   if(tens == 0){     zerosecond();   }else if(tens==1){     onesecond();   }else if(tens==2){     twosecond();   }else if(tens==3){     threesecond();   }else if(tens==4){     foursecond();   }else if(tens==5){     fivesecond();   }else if(tens==6){     sixsecond();   }else if(tens==7){     sevensecond();   }else if(tens==8){     eightsecond();   }else if(tens==9){     ninesecond();   }       Serial.print(inches);   Serial.print(" in, ");   Serial.print(cm);   Serial.print(" cm, ");   Serial.print(Speed);   Serial.print(" mph");   Serial.println();     delay(100); }   long microsecondsToInches(long microseconds) {   // According to Parallax's datasheet for the PING))), there are   // 73.746 microseconds per inch (i.e. sound travels at 1130 feet per   // second).  This gives the distance travelled by the ping, outbound   // and return, so we divide by 2 to get the distance of the obstacle.   // See: http://www.parallax.com/dl/docs/prod/acc/28015-PING-v1.3.pdf   return microseconds / 74 / 2; }   long microsecondsToCentimeters(long microseconds) {   // The speed of sound is 340 m/s or 29 microseconds per centimeter.   // The ping travels out and back, so to find the distance of the   // object we take half of the distance travelled.   return microseconds / 29 / 2; } again, all your help and thought are appricated

Topic by herb1977    |  last reply


Problem with ATtiny85 IR controlled LED

I am making a LED Light Stick with IR control to change the colour. Uploaded the schematics I made. Is there any mistake ? Do i misunderstand anything ? If yes, please forgive me, I am a complete noob and here to learn. I am going to add a 5v regulator to the Attiny85 power supply. And 380ohm resistor from pin5,6,7 to the corresponding transistor's base pins. I planned to use S8050 NPN transistor. How i calculate the things: 1. The RGB LED Strips i using is rated at 15W/metre @ 5V . Power supply i am using is 6V which is 4xAAA battery .I apply P=IV and get 2.5A/metre of current. Then I calculate current used in 60cm of LED Strips (2.5/100*60) and I get 1.5A current per 60cm. I devided the value by 3 and get 0.5A for each Red, Green and Blue pin. 2. Next step, I found the S8050 DC current gain (hFE/Beta) which is 40 and apply the formula Ic/Ib = B (Ic = 0.5A , Ib = unknown, B=40). I get the Ib of 0.0125A. Which mean i need 0.0125A of current in order to Fully-On the transistor at Ic=0.5A @ 6V. 3.To find the resistor value from Attiny85's Pin, I apply formula Ib = (Vb-Vbe)/Rb (Ib=0.0125, Vb=5 because the power supply of Attiny85 is 5v not 6v , Vbe=0.7V , Rb = Unknown) and i get value of Rb = 376ohm approximate to 380ohm. Another issue is that i didn't really know how to write the code. analogWrite seem didn't work for ATtiny85 sincce there's just 2 analog output for the controller. Or delayMicroseconds will work ? But i could'nt figure out how to write the code. I am very new to arduino. I know i should start at the basic first but i really need to get this project done. And please forgive my language. I didn't know English very well. Thanks a lot.

Topic by Sooncheng  


Most Superlative Object In the Office This Month: Bun B's Rap Coloring And Activity Book

Most objects are easily discussed. One simply drapes an adjective or three over it, and calls it well-described.  Occasionally, though, one comes across an object that can only be described as Superlative. Singularly Awful, Amazingly Awesome, Incredibly Unbelievable. Usually draped in exclamation points, often overused, and affective in the extreme, these Things Above Things are worth sharing with the Instructables Community in and of themselves. This week, the most Superlative Object we spy with our little eyes is a book brought to our attention by the mighty Wilgubeast. For those of us whose adolescent and teenage years were punctuated by the boisterous and boastful, rhythmically dense and ethically spare Music Known To Some As Rap, there can only be one gift to give one's favorite B-Boy or B-Girl: "Bun B's Rap Coloring and Activity Book". The Rap Game has more than its share of colorful characters, and this book describes them visually and textually with verve and humor—worthy of particular praise are "Brain Boxing With The Genius", "E-40's Word Bank", and "Match The Scarface". There are word puzzles, connect-the-dots, and of course, lots of opportunities to test your crayon skills. Should any of these challenges prove more than a reader can handle, our advice would paraphrase Ice T: "Don't Hate The Playa, Hate The Game".

Topic by craftclarity  


attiny85 to control two different jobs through a switch?

What i really want is to piece up 2 sketches together in attiny85 programming,the result is to enable it to be controlled through a switch.the 2 sketched are pretty long.I don't know how bcz i am a newbie in programming.at first i thought of 'Case,break'syntax,but later found it may not suitable. The pins i choose is Pin4(Analog2) physical pin3 of attiny85 to control of WS2812B light strip.another Pin1(PWM)physical Pin6 to control a speaker. #include #include #define PIN 4 Adafruit_NeoPixel strip = Adafruit_NeoPixel(30, PIN, NEO_GRB + NEO_KHZ800); void setup() {     Serial.begin(9600);   strip.begin();   strip.show(); // Initialize all pixels to 'off' } void loop() {     int sensorValue = analogRead(A0);   Serial.println(sensorValue);//Just for the calipration     if(sensorValue > 10)   { rainbowCycle(0); } if(sensorValue >30){ theaterChase(strip.Color(255,0,0),10); theaterChase(strip.Color(255,0,0),10); theaterChase(strip.Color(0,0,255),10); } if(sensorValue >40){   colorWipe(strip.Color(255,0,0),10);   colorWipe(strip.Color(0,255,0),10);   colorWipe(strip.Color(0,0,255),10); } } ============ /* ATtiny85 Speaker */ // constants const int Speaker = 1;             // speaker pin void setup() {   pinMode(Speaker, OUTPUT); void playBeep(void) {     for (int i=0; i < 500; i++)     {       digitalWrite(Speaker, HIGH);       delay(1);       digitalWrite(Speaker, LOW);       delay(1);     } }

Question by gada888    |  last reply


Album Review: ZZ Top - Tres Hombres (1973) *****

ZZ Top - Tres Hombres (1973)NachoMahma's Rating: *****Frank Beard - drumsBilly Gibbons - guitar and vocalsDusty Hill - bass and vocals10 Tracks, total time 33:3301 - Waitin' For The Bus (2:53)02 - Jesus Just Left Chicago (3:32)03 - Beer Drinkers And Hell Raisers (3:27)04 - Master Of Sparks (3:31)05 - Hot, Blue, And Righteous (3:18)06 - Move Me On Down The Line (2:31)07 - Precious And Grace (3:10)08 - La Grange (3:54)09 - Sheik (4:05)10 - Have You Heard? (3:13)Third album by the Texas trio. After 1972's rather fractured "Rio Grande Mud" the Little Ol' Band From Texas is finally getting their unique, bluesy sound down. All ten songs are solid ZZ Top and rate four or five stars (out of 5) - definitely a recommended buy. This album is before they discovered the horn section - just three gringos cranking out the tunes. From the slow "Hot, Blue and Righteous" to the Top 40 "La Grange" to the hard-driving "Beer Drinkers And Hell Raisers," there's something here for just about every rock and roll fan - especially those with a taste for white-boy blues.

Topic by NachoMahma    |  last reply


Looking for the right computer

   8 years ago, my dad bought me a computer. It was decent enough, and served me well through school. It did however break down a lot, and over the years my computer(s) have gone through numerous iterations and fixes in an attempt to keep them working. With all the Frankensteining going on, very little (if any) of my original computer is left. These days even wiping the hard disks doesn't fix all the problems. So I find myself in the market for a new machine with very little contemporary knowledge of what to get. And here's where you come in: what does Instructables recommend (specific pieces of equipment if possible) in terms of hardware and computer specs? Usage: I'm a graphic artist focused more on the 2-D side of things; I need enough power and memory to work in large sizes( 40 MB multi-layer images with dimensions well over 10,000 x 10,000 pixels are not that uncommon, and working with a few of these at once will sometimes be necessary) and remain stable 24/7. The computer needs to be able to multitask, at the very least running windows explorer, firefox (tab addict), fireworks, a basic text editor, and a media player simultaneously.  It has to have at least a couple hundred gigs of space, and be able to display and edit large video files as well. I've got a couple thousand dollars handy, and can save for more if necessary; I just need a good machine that'll perform to expectations and remain error-free for as long as possible. So, Instructables, any suggestions?

Topic by Ifer    |  last reply


(newsletter) Soda Can Chain Mail, One-Ingredient Ice Cream, Cardboard Kayak...

Sign-up for this newsletter: Welcome back! NEW CONTEST: Digital Days Photo Contest - Show us your best photo trick, tip, or homemade gadget to win a new Sony digital camera! Converse Back to School in Style Contest - Make or customize anything school-related and win a gift card so you can make your own custom Converse shoes! SINGER Kids Crafts Contest - Create something crafty with or for a kid and win a sweet new serger or sewing machine from SINGER! Forbes Teach Me Fast Contest - Make a 30-second how-to video and win one of six awesome Flip MinoHD video cameras! Winning videos will be featured on Forbes.com. VOTE NOW: Help pick the finalists in the Gorilla Glue Cardboard Contest! Want faster updates and inside info? Follow Instructables on Twitter and Facebook! Genuine Chainmaille from Pop Tabs Beyond Belief and Back - Optical Illusion One-ingredient Ice Cream Build a Cardboard Kayak for Under $40 Win a digital camera! Get crafty! Make Your Own Sports Drink Build a Photographer’s Zoom Spot Ready, Set, Go! Light How to Get a Great Old Sewing Machine Fuse Plastic Bags into a Laptop Case Bike Panniers from Military Surplus Bags Make Your Own Bra Make a Pencil's Lead Potentiometer Share something cool quickly! Win a pair of custom Converse shoes! Motorized Marble Roller Coaster Rework a UPS with Massive Capacity Table Top Aquarium Living Wall Sign-up for this newsletter:

Topic by fungus amungus    |  last reply


Rechargeable Battery Help?

I'm sick of throwing away AA batteries, and I go through a lot with my camera flash. The only rechargeable, multi purpose batteries I've used were some generic energizer ones I got some years ago, so I need your recommendations.I'm willing to spend a bit more for a quality charger/batteries that will last. For batteries, I'd like to support Eneloop, as they sponsored an instructables contest in the past. They are significantly better than Energizer/Duracell, right? How does Rayovac compare in price/power?For a charger, I was looking at the the BC-9009 by La Crosse. It has good reviews, charges slowly for a slower drain, prevents overcharging and has all sorts of other features. It comes with 4 AA, 4 AAA batteries and a case for $40. See it here:http://www.amazon.com/Crosse-Technology-BC-9009-AlphaPower-Battery/dp/B00077AA5Q/ref=sr_1_1?ie=UTF8&s;=electronics&qid;=1251579646&sr;=8-1I don't know how good the la crosse batteries that it comes with are, though. The BC-700 would work fine and can be bought alone for $30.For packaging reference, I need to have at least 8 AA batteries, but would definitely use any extra AA or AAA that might come with it.So, what do you have to suggest? Thanks!Update: I read that energizers may be better than eneloops for things that use a lot of power quickly (like a camera flash) while the eneloops are better for things that use it slowly (like a remote control). Is that true? I'm concerned about getting batteries that will store a lot of electricity over many charge cycles, but not so much about them holding a charge during storage.

Topic by Weissensteinburg    |  last reply


The classic IRFP250N vs FDP33N25? Which one is best for high power SMPS? Answered

I have an idea to start selling some powermax singing arc kits. In the kit I plan to include all the parts including a printed PCB to create an audio modulated flyback driver. I figure to start off with, since I have no clue what demand would be, I want to play it safe and only get enough parts for 10 - 25 quantity, which works out to be about $40, or about $4 a piece, not including custom PCBs. However, at >$2, the IRFP250 is not cheap even in 10's of quantities on Digikey. Looking to shave off pennies, I found the FDP33N25 for about half the cost of the classic IRFP250N and best part is that it appears to have simalar specs, and in some ways it looks like the FDP33N25 is even better! Bolded parameters are the (I think) prefered values. I do not know much about selecting the best transistor for the job, but I did compare the specs below: IRFP250N: 85mΩ Rds ON, 30A, 200Vds, 2800pf gate capacitance, TO-247, 0.65 *C/W FDP33N25: 94mΩ Rds ON, 33A, 250Vds, 2135pf gate capacitance, TO-220, 0.80 *C/W One thing I am concerned about power loss and therefore switching speed, so the MOSFET must be driven with a 15KHz to 40KHz square wave with very sharp rise and fall speeds. I was able to reduce power dissipation in my last circuit by simply shortening the wire carrying the signal to the gate, as well as adding a complementary pair of NPN and PNP transistors to the output of the 555 timer. That seemed to lower the drive impedance and switch the mosfet more rapidly, but considering that I still need to use active cooling and a brick sized heatsink, I think I can do better. Any suggestions?

Question by -max-    |  last reply


Venus Zine Craft-off Contest

Got a clever handmade gift idea? Does it cost less than $40 to produce? Want to share your project with the world? If you answered yes to these questions, you should totally enter Venus Zine’s 4th Annual Craft-Off Contest, a competition pitting the craftiest in the land against one another to come up with the best, most creative, most fantabulous DIY creations imaginable ... on a budget.Winners will be chosen from the submissions received, and the best projects will be featured in the winter 2008–2009 issue of Venus Zine, on newsstands December 1. Winners will receive a four-issue subscription to Venus Zine — additional prizes to be announced (keep checking back!). Winners will be featured fancy pants–style in the magazine (photo and bio and all) in addition to venuszine.com.RULES SHMULES- Your project should be an innovative, unusual creation using materials whose total cost does not exceed $40. We’re looking for jewelry, clothing, home décor, furniture, bags, accessories, bath and body works, pet goodies, and whatever else you can think of. Try to come up with unexpected uses for objects, or put a new spin on an old favorite. Surprise us with your boundless creativity. The mission is to create gifts to give during the holiday season, but your project doesn’t need to be holiday-themed.- Your entry consists of two parts:1. Digital photographs of your project: We will not actually run your photos, so don’t worry about doing a high-tech photo shoot. Instead, we will conduct our own photo shoot for the magazine.2. A set of instructions for assembling it. How-tos should be concise but sufficiently detailed so that Venus Zine readers may replicate your work. Please include a materials list that gives the approximate cost of each material.- Any Venus Zine reader is welcome to participate, whether you’re a DIY businessperson or just have a flair for the crafty. Unfortunately, if you’re related to a Venus Zine staffer, you cannot apply. (You know how it goes – we wouldn’t want it to look like we’re biased.)HOW TO SUBMIT YOUR BRILLIANT IDEA- E-mail jpegs of your Craft-off Contest submission along with how-to instructions to craftoff@venuszine.com .- All entries must be received by September 18, 2008, to be considered. We will notify you if you are a winner.- You may submit up to five projects.Ladies and gentlemen, fire up your glue guns, rev up your sewing machines, and show us what you’re made of!PRIZESInterested in applying to be a Craft-off Contest prize sponsor? Get in touch with Anne Brindle at anne@venuszine.com for details. Keep checking back! Prizes will be announced soon.

Topic by VenusZine    |  last reply


I want to learn how to build a vacuum tube guitar amplifier

I have a slight issue that I am sure a lot of you do too... I have a million interests, hobbies, and maybe even some borderline-diagnosable passions. My problem is, I am 40 years old already, and I do not have years left on Earth to become a full-system level electrical engineer, a full-stack software engineer, and a master carpenter... just to name a few. So, I am looking for the best resource that you guys can suggest for where to start so that I can learn how to build a tube amplifier along the lines of a Fender, Marshall, Vox AC30, et cetera. of course, I do not aspire to revolutionize, or even evolution-ize guitar amps, and I also do not aspire to build some esoteric masterpiece copy with three independent channels, each with a separate EQ, a foot-switch, and multiple ins/outs. I just want to build a simple, 1-channel amplifier that has enough power to produce a very clean tone without distorting, but has a gain, and a master volume so that it can be "pushed" to produce a distorted sound. I do not care at all if it sounds "good." I just want to do it, and I do not want to have to spend 2 years going down a Nikola Tesla rabbit hole trying to learn every theory of physics, electronics, etc. I just want to learn how to construct the circuit(s) and not electrocute myself by being dumb. So, don't get me wrong... I want to learn the right way! Just looking for a good resource. Amazon.com has dozens of books with titles that all sound the same. Does anyone know of the quick-and-dirty-bible for this?

Question by Dolmetscher007    |  last reply


I need help with my arduino code, the error code is "stray #" . located at #define DO_NEXT 4

1.//iOS switch control example 2.//Simple version 3.#define MY_DEBUG 1 4.#include "BluefruitRoutines.h" 5. 6.//Pin numbers for switches 7.#define PREVIOUS_SWITCH A0 8.#define SELECT_SWITCH A1 9.#define NEXT_SWITCH A2 10. 11.//Actions 12.#define DO_PREVIOUS 1 13.#define DO_SELECT   2 14.#define DO_NEXT     4 15. 16.uint8_t readSwitches(void) { 17.  return (~(digitalRead(PREVIOUS_SWITCH)*DO_PREVIOUS 18.      + digitalRead(SELECT_SWITCH)*DO_SELECT 19.      + digitalRead (NEXT_SWITCH)*DO_NEXT) 20.     ) & (DO_PREVIOUS+ DO_SELECT+ DO_NEXT); 21.} 22. 23.//Translate character to keyboard keycode and transmit 24.void pressKeyCode (uint8_t c) { 25.  ble.print(F("AT+BLEKEYBOARDCODE=00-00-")); 26.  uint8_t Code=c-'a'+4; 27.  if (Code<0x10)ble.print("0"); 28.  ble.print(Code,HEX); 29.  ble.println(F("-00-00-00-00")); 30.  MESSAGE(F("Pressed.")); 31.  delay(100);//de-bounce 32.  while (readSwitches()) { //wait for button to be released 33.    /*do nothing*/ 34.  }; 35.  ble.println(F("AT+BLEKEYBOARDCODE=00-00")); 36.  MESSAGE(F("Released")); 37.} 38. 39.void setup() { 40.  if(MY_DEBUG) 41.  while (! Serial) {}; delay (500); 42.  Serial.begin(9600); Serial.println("Debug output"); 43.endif 44.  pinMode(SELECT_SWITCH, INPUT_PULLUP); 45.  pinMode(NEXT_SWITCH, INPUT_PULLUP); 46.  pinMode(PREVIOUS_SWITCH, INPUT_PULLUP); 47.  initializeBluefruit(); 48.} 49. 50.void loop() { 51.  uint8_t i=readSwitches(); 52.  switch (i) { 53.    case DO_PREVIOUS: pressKeyCode('p'); break; 54.    case DO_SELECT:   pressKeyCode('s'); break; 55.    case DO_NEXT:     pressKeyCode('n'); break; 56.  } 57.} void setup() {   // put your setup code here, to run once: } void loop() {   // put your main code here, to run repeatedly: }

Question by JacLir00179    |  last reply