What is the best instructable. I want to know what u guys think because i'm trying to find something really cool and fun to make and show.
Question by EncasedDeath | last reply
The best batchers (that i know of) are the following: 1.) me, i've made a few good viruses 2.) mutant, he's really good, i don't even fully understand hs instructable (maybe he should write the code of his links since they don't work) 3.) tat guy that mutant argued on on that other forum, i would like to learn more from him
Topic by thefirstgaruga | last reply
I need to driver (5) 1watt white LEDs (forward voltage of 3.2~3.5v) and current of 350mA. I guess the best way would be to connect them all in series and somehow give them power. This is meant to be powered off of the wall socket (whether through SMPS or a capacitor or a resistor or a transformer or anything.). My question is what's the best way to drive them? I've never really used high power LEDs before. I'd also prefer to be able to adjust the brightness...
Topic by guyfrom7up | last reply
Hi, I am looking to make one PCB with dimensions 7"x7". I know that this is rather large, but was wondering if anyone knew the cheapest place to have this made as long it is decent quality? Time is not an important factor. It will probably be 2 layers, 4 at most. I know about Sparkfun's BatchPCB service. Thanks for your help.
Question by Hammock Boy | last reply
Sorry for posting a repeated question(i think) Well, i'm so new to high power LEDs, My dad bought a high power LED on ebay http://www.ebay.com/itm/160584479457?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649 The LED has the following specifications Working Forward Voltage (VF) : 9-12V DC Working Forward Current (IF) :1000mA Intensity Luminous: 800Lm The seller told me to use a DC DC converter for it. I will not pay $20 for one. I've seen lots of sites about the driver but most of them has circuit made for LEDs which have a forward voltage of 2.8-3.6V. and mine has a Forward Voltage of 12V. So what will be the best driver for it. I found this one but i'm wondering if this would work http://www.simple-electronics.com/2011/09/high-current-led-driver-using-fet.html
Question by ARJOON | last reply
I have a TP-link TL-WN722N wifi adapter ... it came with a detachable 4dbi antenna but its range is not good i want to use some wifi which are far from me with my current adapter the signal i get is very weak so i think by replacing antenna i can increase its range :) i searched a little bit no google & website & i liked this https://www.instructables.com/id/Biquad-Yagi-2-4GHz-Wifi-Antenna/ :) i think i can make it :) is there is any better option than this ? i want a long range antenna
Question by aayushsoni007 | last reply
POLLSo as the title says.....What do you reckon is the "Best laptop" ?You can post the exact model of which you think is the best. Also do this :Best laptop in:Budget : ( answer)High spec : (answer)And what do you guys think is the best laptop brand?( can only choose from options listed ! )- Dell- Apple (macbook)- Sony VAIO- HP- Acer- Toshiba- Vadim- IBM- Gateway- Asus
Topic by Baron A | last reply
What's the best electro-static influence machine? Like which one can output the best sparks for the spinning input, ie which one is the most efficient? Wimshurst Sectorless Wimshurst (Bonnetti) Van De Graff Voss Holtz Lebiez Leyser Bohnenberger Wehrsen Wilson Or some friction (not influence) based electrostatic machine? All of the influence machines are pretty similar, but I need to make a fairly small one (think disk diameters of only 3 or 4 inches), and i'm trying to make it hand held, so efficiency is a must!
Topic by guyfrom7up | last reply
In my science class right now, we are making bottle rockets. I was wondering what the best shape of parachute to use is. Also, how should I attach the parachute to the rocket?
Device x has a button and is 25 feet from device Y. Device Y needs to know when the button is pressed and activate device Z, but it has to be cheap and if I have a lot (A LOT) of these sets near eachother they still need to work without interfering with eachother. Best Solution?
Question by snowpenguin | last reply
I went to the electronics shop looking for a resistor, but they said for me choose the wattage! As far as I know, the wattage of a resitor is calculated by its current or voltage. Please help me!
Question by ace_gatling | last reply
I'm doing a little informal research to find the best deal in neodymium magnets. The price per cubic inch seems to be extremely variable- some on the order of $10 and others in the hundreds of dollars. Can you find a better deal than I did? Conditions on the order of NdFeB magnets: * Total price, including shipping to the US, under $30 * Contains at least four magnets with intact coating * Contains a total of at least 6 cubic inches (98322mm^3) of magnet The best I could come up with is $4.93 per cubic inch. Can you find a better unit price?
Question by NobodyInParticular | last reply
Whats the best capacitor to store charge and release slowly, i want to turn a motor which generates dc into the capacitor and then the capacitor releases this charge into another motor at the flick of a switch for a long time , i have already found a circuit perfect for this but its just finding the capacitor, or should i just use a rechargeable battery, p.s i would still like to know which capacitor would be good for this.
Question by connorfrancis | last reply
Hi everyone. I live in Mexico, and getting an Arduino is hard, not to mention way more expensive than the $30 US version. I was looking for some Arduino clones that you can do yourself (Open source, no kits) but since I've never used an Arduino I don't know how to compare them and decide wich is the best. I hope someone experienced on Arduino and Arduino clones can help me out. Thanks in advance. Cheers!
Topic by Skyriam
I've heard of computers fried in electrical storms, even with a surge protector. 1) Is there a better way to protect it, short of unplugging? a friend mentioned connecting it thru a bus, and letting the bus act as a fuse. I'm not sure what he was really getting at. 2) What are the odds? 3) experiences + anecdotes?
Topic by Toga_Dan | last reply
Hello, So I'd like to start with robotics, but I don't really know where to start, just start with a project, or read things first? I don't want to buy all kinds of stuff or arduino while I can't use it, because I'm new with robotics. Hope someone can help, Thanks in advance!
Topic by Kolnorp
For Christmas I want to give my brother a kit to teach him to solder. The kit doesn't have to be that complex, and would ideally be made of parts that I could easily find myself (rather than buying in kit form). I was thinking a pummer, or a simple light following robot. Anyone have any suggestions?
Question by I_bike | last reply
I need to design a bridge for a project but it has to be made out of MDF that is 20cm x 33cm x 3mm MDF that is 3mm x 3mm x anything hot glue and string. It has to be strong, span 60cm have a 30cm clearance and be 20cm wide. It can have no supports and not attach to the ground. The wide MDF can only be used for the road and you cannot layer it.
Question by eggyeggyeggy | last reply
I am looking for a chip just like the ones used in any calculator that does multiplication addition and subtraction. THe device i am looking to build has to be as thin as a credit card have a 8 character segment lcd and only be able to do addition and subtraction. so i need to be able to have buttons" 1 to 0 + - and = and . "nothing more. i looked at some attiny ics but they require a another ic to drive the lcd. also the the data entered need to stay in if the power of the ic goes out. most calculators have only one ic, any idea what the best ic for this application will be? thank you in advance. i need something this small. http://www.logopremiums.com/calculator-ballpoint-pen-HWK922LP.jpg Thank you
Topic by virgiltu | last reply
Ok, so my father has offered to pay for HALF of a new computer. But which type is the best? Macs are very aesthetic, but expensive. I also would be dual booting it with windows. PC's are cheaper, but sometimes that also reflects in the hardware. My only requirement is that it be gaming compatible. Big monitor, if it's like a iMac and has one built in. High performance graphics. I'd like atleast 4gb of memory, but 8+ would be delightful. Harddrive space isn't really an issue, since I am currently using about 60 gb. I have something like $400 right now. I could probably make that around 800 - 900 by the end of the summer. So a Mac is defiantly a possibility. Also, I'm a student so I get a $100 dollar rebate from the Mac store.
Topic by Padlock | last reply
I would like to buy a smartphone but a don't want it for calling or texting. I just want to use it for listening to recordings and music and watching downloaded videos and I would like to take pictures with it it and do all the other things a smartphone can do except what it's designed for. What phone would you recommend? I want a phone that has lot of accessories made for it. I would like this phone to be under 150$. I want to also use this phone for lots of DIY projects.
Question by sonic broom | last reply
I already know a very small smidge(really not enough to say "know". More like I can read a Java program's source, and understand the difference between the methods, the classes, etc. and how they are used.)However, I don't know enough to write my own. I have a couple of books(Java for Dummies, and Sams Teach Yourself Java in 24 Hours), but they haven't really been much help to this point. Does anyone else know of a good book for learning Java?
Topic by metrogdor22 | last reply
I am trying to configure a LED circuit that allows me to charge 1.2v batteries using a solar panel. But i also want the solar panel to be used as a light sensor(detector) so during the day it charges..then at night the battery kicks in and lights up my LED strips. This is my first upgraded version using a schematic software.. Please help. Should i add 2 indicator LED's to let me know when the battery is being charged and when the battery is in use? I attached two images..one containing a LM317T and the other without. Just need some advice! Thanks
Question by islandboii242 | last reply