Posted by bluebox17 8 years ago | last reply 8 years ago
I am trying to make my own flasher controller for a pair of LED light modules. The 12 volt, low amp draw lights are to be used on a golf cart that we use when the patrol cars are not needed on campus. Traffic control is the main use due to being able to put it anywhere the patrol cars will not go. The flash patterns can be any type as long as it is automatic, and keep changing, like the strobe lights on police, fire, and EMS units. Some have 4 patterns, some have up to 18 patterns. Any one have a diagram or circuit design that may work? Thanks for any help.
Asked by kstokes606 8 years ago
I have a unit that i'm thinking of putting wheels/rollers onto, so i can store some DVDs/Blu-rays under my bed. But i started thinking perhaps i can somehow make it automated, so say when i press a button that it comes out. I wouldn't really know where to start, idk even how easy this would be. I did have a quick look to see if anyone had already published anything like this, i can't really say i came across anything, though as i said it was only a quick look. Any help would be appreciated.
Posted by BradSabbath 3 years ago | last reply 3 years ago
Asked by mortemere5 8 years ago | last reply 8 years ago
Hi guys! Do you study about the PMU (Power Management Unit)? If you have any document about it please send me? Thank you
Asked by DaoXuanQuyen 2 years ago | last reply 2 years ago
Would building an array of peltier units in a windows frame work to cool down a room? This way hot air would stay outside and the inside "windows" would be cold. Either using heatsink and multiples computer fans to throw air in room or pumping water in pipes then on the units then to a big fan. Also, could this run on solar cells placed on the outside?
Asked by gazoutg 8 years ago | last reply 5 months ago
I was looking for a HowTo on building a capacitor charging unit. I saw a thread on a forum a while back that said you could create a large EM Pulse by sending a huge current down a coil of wire. I was looking about wiring up a bunch of these 220uF caps from Maplinhttp://www.maplin.co.uk/module.aspx?ITAG=SPEC&ModuleNo;=12777&doy;=28m9#specThey are the last ones on the list.Would a few of these be sufficient to produce a large EM field, one that could fry sensitive electronic equipment. And how would i go about charging them all to the full capacity.Also while on this topic, would this be an efficient way of generating an EM pulse, or could you suggest any other ways of doing so.
Posted by EthanV2 11 years ago | last reply 11 years ago
I want to make a mini fridge so i need peltier units. I can post the mini fridge instructable when I'm done but i neeed peltier units!!
Asked by sky0 8 years ago | last reply 8 years ago
I design micro - and slightly bigger - biodiesel units. I want to mix the methoxide with a non-electric mixer. Slow and steady is all that is needed. I have the idea of using a mixer that works like an egg beater or butter churn. The mixing container will be of 100-200 litre capacity with a closed lid to avoid chemical fumes. Can anyone directly me to where I can source something like this? I have been to a couple of companies in the food processing industry - to no avail (yet) - as most equipment is electric. I work from Centurion, Pretoria, Gauteng, South Africa - so local will be lekker (excellent) !!
Asked by Bioman.co.za 6 years ago | last reply 6 years ago
Hey all! Just thought I would try and save myself some time, by inquiring with you fine folk first.. I am attempting to build a mini turbine system to generate power from a home standard incoming water supply... The PSI is easily high enough to run a mini power gerenating system without a significan/noticable drop in water pressure of the home.. So anyway, this is the prototype that I just knocked up to give you the jist of it.. Any comments on improving the design would be appreciated.. eg.. flow, restrictions etc. The turbines will drive a belt connected to a dynamo... Thanks for your time.... LftnDbt
Posted by Lftndbt 10 years ago | last reply 4 years ago
I had got this PSU for free from PC world, the guy who gave this to me does not know if it works or not... This is my first PSU, I never used one before...So I am asking you how to test this PSU. I hear they have safety wires that must be connected to another wire or something - I don't know...I hope you can help me... Thanks!UPDATEYay! My PSU works :-)Thank you all who helped me!And even better, I do not need to use a power resistor to keep the PSU on!
Posted by Plasmana 10 years ago | last reply 10 years ago
Hi, I'm wanting to put some led indicators in my car because they are so efficient but my current flasher unit isn't designed to run such a low load. It is also relay based which probably isn't the most efficient way of doing things and with it being an old mini it sometimes rattles itself at whatever rate it feels like flashing at at the time so I wanted to use a transistor instead. I've come up with the circuit attached and built it but when it is running all the indicator lights for the hazzards, the transistor gets hot! Surely there is a better way of doing it? Could someone have a look and see what could be changed? I don't know much about transistors but I know that I'd be better getting it to 'saturate' and act as a low resistance switch but I don't know how to achieve that. It also has to run under two loads, indicators and hazzards, and has to flash at the same rate for each - between 1hz and 2hz. http://www.dprg.org/tutorials/2005-11a/index.html I think a variation of this circuit might be better (it makes use of the discharge pin rather than the output pin), with the load at the ground side of the transistor because it has to be an output pin on the flasher unit. I've got some BFY51, BUY82, BD743B so it would be great to use one of them. in short: what's the best solid state fixed rate 12v flasher driver using a 555 that can supply around 2 amps using as few parts as possible? Thanks for your time, and sorry if I've done anything wrong!
Posted by arichardson 6 years ago | last reply 6 years ago
How can I connect my mp3 player to the built in amp on my cars head unit. I suppose i need to do some soldering but I dont know what I am looking for. If I connect the MP3 player to the speaker outputs it plays too softly. I need to get it going through the amp in order to play loud enough. How Can I do this?
Asked by kokaine 8 years ago | last reply 7 years ago
I have recently purchased a new window-mount air conditioner, and now I am looking at the crappy old one saying "I can't just throw this away after having read the Dumpster Dipping instructable!" Any ideas on how to reuse/recycle this horribly used (purchased ca. 1988) A/C unit that hardly puts out cold air anymore?
Posted by V-Man737 10 years ago | last reply 10 years ago
I have an older AC wall unit in my apartment. It has 3 dials – one for temperature (1-8 where 8 is coldest), one for fan speeds (low cold, high cold, low fan, high fan), and a manual lever that opens the vent in the back. I’m reciting this by memory as I haven’t actually looked at it closely, but it has one of the larger 3 pronged cables that plugs into a dedicated outlet in my wall (perhaps used for a higher voltage). In any case, my intentions are as follows: • Have a timer for the AC unit to plug into to turn off on programmable intervals o Monday – Friday it will be on after 6:00pm until 7:00am the following morning. • One nice feature would be to give it a thermostat capability. o If the temperature is below 70 degrees during these time intervals, for instance, then the AC unit will shut off, otherwise it will power back on. • Another obscure (and I’m sure complex) feature would be to allow remote access to the timer. I know that this requires some unique hardware, but I’m familiar with programming and can visualize the methodology in telling the timer/thermostat unit a different set of commands (let’s say I know that I’m coming home early – I send information to the device via the internet to have it turn on a few minutes before I get home). I understand the last part is quite complex, but it’s not a priority at all, rather, a neat little feature that would make this all the more worthwhile (and in my eyes more interesting). I know that there is a similar device out there (can’t remember the brand name) that has a lot of these features, but I’m not willing to drop $300+ on something like that. For now, my priorities are listed in order per the bullets. First and foremost is being able to program a timer for a wall AC unit. Second is to have it detect the temperature of the room and set it accordingly. And third is the availability to ‘talk’ to the device remotely. My question for you is: how can I get through the logistics on this sort of project? What components (hardware) am I looking at (general price range), and what degree of difficulty will this entail? I have my computer practically right next to my AC unit, so communication with the device won’t be difficult in those regards. Otherwise, I’m just looking for tips and pointers. If someone happens to know of a (cheap) unit that does most everything that I’m looking for, then great. I’m all ears and really appreciate any feedback.
Posted by Phoenix5794 6 years ago | last reply 6 years ago
I have 3 "iCamera 1000" camera units laying around. I do not have the rest of the security system they are designed to function with, but there has to be some way to make use of them and have some fun. I have lots of cat 6 cable and RJ45 connectors to custom make a cable if anyone has the expertise to figure out how to make use of these. Before posting here, I searched and searched here and on Google but only found information regarding the "normal" application of these cameras..... I was hoping for something more outside the box which is why I am here. I included a front/back picture. Thanks for any ideas!!
Posted by PigWhistle 3 years ago | last reply 7 hours ago
I have multiple UHF microphone units. They have two antenna's on the back of them, it picks whatever is the strongest signal for 'true diversity'. My question is, Instead of buying those really expensive antenna distribution units. Would I be able to group each of the antenna connections from the units to one antenna for each side and use two high gain UHF antenna's to receive the signal. I would think that the receiver units would pick out the signal individually as they are set on different channels. All the units are exactly the same with the same antenna's. I could be very wrong with this however! Any feedback is very welcome! Thanks
Asked by oscarthompson 6 years ago | last reply 6 years ago
Hey All, In my car i have an after market HU with a usb port that my iPad 3/ iPhone 4s / iPods can connect to. However when my iPad is connected to it is unable to charge. The charging indicator in the iPad has the little lightning bolt going through it, indicating that it is indeed charging however the iPad looses about 7% of its battery every hour. Does anyone have any suggestions on how i can get my iPad to charge through my HU? Cheers
Posted by wrignj08 6 years ago | last reply 6 years ago
Ok, so i took apart a old lcd monitor and found a w78e65p-40 microcontroler unit in it. i have no idea how to use it and whit not, and it just slides out a holder, so it can be put back in. again no idea how to use it, but this site may be of help to describe it http://www.8052.com/codelib/w78e65.pdf
Posted by killmore231 10 years ago
Hi everyone! I'm wondering what are some good resources to learn how to build a simple programmable CPU from 74XX logic chips. I'd like to build one where I use DIP switches to program the CPU. I don't have an EEPROM/EPROM/PROM burner, so using those are out of the question. I've seen some CPU's already that run an internet server, but they are too complicated/expensive to build and understand. I want to learn how a CPU can be built and the principles behind it. I have about 150 74XX chips, including a 74LS181 ALU unit. I also have enough capacitors and resistors for the project. Thank you!
Asked by prrgg14935 7 years ago | last reply 7 years ago
I do work for a lady, and she seems to have a hoarding problem. She has 100's + bottles, gallons, AND trash cans of this "water". What is it? AND what is it safe to do with?
Asked by onrust 7 years ago | last reply 7 years ago
This is an idea that has been tried before with other type equipment & applications. However I think that I have found a way to limit the cost & over size of the application for the use intended. The rubb is that I need help with the fabrication. So I am hoping that the brain power will rally to help in a proto-type or test model of this idea.THE IDEA: A mini A/C unit to keep a vehicle cool for short periods of time 1-2 hours.Why needed?? I own a Private Investigation Agency and have very expensive electronic equipment inside sensitive to the high heat in south Texas during the summer.Equipment on hand for the idea:A. Small Cooler & HEater unit that can be found @ most Walmart, Walgreens, ect... Size 12"x 10" x 6"Input: 100-240VAC 1.2 A 40 watt Output 12 volt 4.0 A (looks like a tall showbox with a single hinge that opens like a center console-armrest-glovebox in a truck or van. Picture below...B. A DC/AC convertor also sold at same stores. The unit is very small but will power the unit very easy. 12 volt 5 A 100 watt, 4" x 3" x 3/4"C. a zeus sealed 12 volt battery 4-5 AH with the PWR use of cooler.D. VArious size small electric fans to be used a blower fans.E. PVC or duct work for the application.F. Optional Solar Cell for battery recharge to be mounted on roof of vehicle.I am sorry if my post is inapropiate for this forum or if I have used this post wrong for my purpose. This is my first time to post anything...If there is anything I can do to help with the concept please let me know.I will try and add Pic's of the parts later.THANKS!!!PS: total cost of everything brand new was less than $50.00
Posted by leebarret 10 years ago | last reply 9 years ago
On my previous car, I hacked together an aux input with two CD-ROM plugs as described in many places on the Internet (here's one). I was really happy with it, and fully intend to do the same on my new (?) second-hand car, which also has CD-changer support, but no AUX. (Neither car had a CD changer installed, because I couldn't be bothered). The new car has steering wheel controls though, and I thought this could be a nice upgrade, but I'm really not sure how to do it. The pin-out diagrams for the CD changer plug (which I stole from here) for the CN702 12 pin connector shows lines 9 and 10 as TX signal lines. Since there are track (and disc) up and down buttons on the radio, I assume this is how the commands get through to the CD changer. And the phone obviously has support for headsets with track skip buttons. So the stars seem to align. Except for the details. First, a normal audio cable only has three wires and one with headset controls have four: Ground, left, right and comms. I think I can connect the following pins on the 12 pin connector to ground: 6, 7 and 9 and then 1, 2 and 10 get connected to the correct wires. Is this correct? Second, I have no idea if the actual signals sent to TX for a CD changer bear any resemblance to what the phone expects from a headset. Does anyone know? I can probably hack a test using a bread board. I think. Third: I really only dabble in these things. Did I miss anything really important?
Posted by CobusK1 2 years ago | last reply 2 years ago
I recently received two demo broiler units from my friend's dad. They both each have one broiler unit and a carbon fiber filament inside a quartz tube. (Just what my dad relayed to me from him.) What the hell should I do with these bad boys?
Asked by Zem 7 years ago | last reply 7 years ago
TELL ME WHETER THE UNIT MEASURES LENGTH, MASS, TIME, TEMPERATURE, VOLUME, OR SOMETHING ELSE
I have been wanting to make a crossover unit for some speakers (i literally have 14+ speakers of various sizes laying around) and i was wondering how feasible this is...
Asked by deedeedee9 9 years ago | last reply 9 years ago
Hi! I purchased an "industrial" shelving system that I will soon install in my home. Each unit will be separate and measures 7 feet high, 4 feet wide and 2 feet deep. Each will have 5 shelves that can hold 600 pounds each. They can be bolted or clipped, but I prefer to use the clips (unless instructed otherwise by a guru). I'm not going to put anything much heavier than books on them. I was assured by the seller that the units did not need bracings, but everyone else tells me otherwise. So what's YOUR take, fellow instructables member? How can you tell if a shelving system needs braces? If so, where do you put them? At the back back or on the sides? Full length (7' x 4') or any size but in the middle of the posts? Thank you very much!!
Asked by John Mitchell 8 years ago | last reply 8 years ago
I have been looking to find a long heat sink like this one: http://www.anglia-live.com/products/kw/LAM-4-150-05-V/774353001_HEATSINK-FAN-150MM-5VDC but I can't find one that is cheaper or similar (Other than other models of this). I basically want to make a thin air conditioner with about 18 peltier units. I want one of those heat sinks on the hot side. I then want to do the same thing on the cold side or I want to use a bunch of mini 40x40mm fans on each cold side of the peltier units. Please let me know if you know any similar heat sink designs or if there is a name for this kind of design. Also, if there are no similar heat sinks, could I just go to Home Depot and buy a hollow aluminum square pipe and add a mini PC fan instead of this? I would assume it wouldn't be as effective because of the less surface area, but, it would be cheaper I think.
Asked by knexpert1700 4 years ago | last reply 4 years ago
Vote JellyWoo for the president of the United States of America! this website lets you enter in your name and then it will create a video for you. See my video as an example.
Posted by JellyWoo 10 years ago | last reply 10 years ago
, any ideas on how i can make this unit rechargeable? and by that i mean to where u plug a cord into the unit and it charges the internal battery for the battery is not removable in the unit so its kind of same idea as charging your cell phone. below is a drawing of the unit.
Asked by GNOEL82 4 months ago | last reply 4 months ago
Hi. I got problem and I cant find the solution. got outside unit inverter aircondition, but indoor unit is missing (resason why I get unit for discount price ) and now I cant run outside unit, because inverter AC you cant control without that PCB from indoorunit but I cant find new-used I search like crazy days and no result :( is any chance to run that unit without original PCB ? maybe with arduino etc ? and if anyone know for good store for AC parts (no matter which continent), I need for AIRWELL GC plus 9 thank you for all informations
Posted by primoz1 4 years ago
I've seen ads for pest control units that transmit some sort of signal that drives bugs &rodents away... friend had one & she didn't even get flies... but not sure which ones really work, and so expensive..... Would love to find a DIY Instructable on this! It would save money, the environment...etc...
Asked by StarrsWife 9 years ago | last reply 10 months ago
I have a Motorola SURFboard SB5101U cable modem. It has one Ethernet port and one USB ("square" type) port. I have an Apple Airport Express wireless plugged into the Ethernet port. Here's the problem. I want to use "MagicJack Plus" (VoiP) without plugging it into the computer (THE difference from the "regular" MagicJack, that it (the Plus) can be plugged directly into the modem, bypassing the computer, so the computer doesn't have to be left on 24/7 for your phone service). My question is, can a simple Ethernet (pigtail) splitter be used to plug both the MagicJack Plus and the Apple Airport Express wireless into the modem? I know this can be "Physically" but is the "signal" degraded in any way to the two units?
Asked by nbakerjr 7 years ago | last reply 7 years ago
Note: This was originally intended as a reply in the Americium-241 Science forum topicWhen people talk about "radiation," they are referring to many different things, and are probably thinking of some things that don't even apply. "Radiation," the invisible energy given off by radioactive materials, can be either "subatomic" particles or electromagnetic. The most common particles emitted are "beta rays," high-energy electrons, and "alpha particles," helium nuclei. Some sources can emit neutrons, protons, or "positive beta rays" (anti-electrons, or positrons), but those are much less common.The units we use to measure radioactivity are becquerels (Bq, decays per second) or curies (Ci, 3.7 x 1010 decays per second). Since the effects of radiation depend on their energy, another unit of interest is absorbed dose, the energy deposited per unit mass of target, measured in grays (Gy).Safety experts classify radiation into "ionizing," meaning there is enough energy to knock electrons out of atoms or molecules, and "non-ionizing." Infrared and ultraviolet light are non-ionizing, as are neutrons. Alpha particles (helium nuclei), beta particles (electrons) and gammas (as well as lower energy X-rays) are all ionizing radiation. The three have substantially different effects on biological systems, even at the same absorbed dose. Consequently, for radiation safety purposes, scaling factors are applied to produce numerical measures (sieverts, Sv) of "effective" or "equivalent" dose, that can be compared across different kinds of sources.Here's a small table with information for some commonly encountered sources. Isotope Source Activity Dose rate Am-241 smoke detector 35 kBq (1 ÂµCi) 11 ÂµSv/yr @ 1m Te-99m MRI contrast 740 MBq (20 mCi) 1.6 Sv/hr @ 1cm C-14 atmosphere, body 0.23 Bq 10 ÂµSv/yr K-40 bananas, body 4.4 kBq 200 ÂµSv/yrWhat you should see clearly from this is that the natural radioactivity in your body is comparable or larger than that in a common smoke detector. At SLAC, the limit for exposure to sources at the lab by most staff (including me) is 20 ÂµSv/yr (5 mrem).As I noted above, neutrons are sometimes lumped in with ionizing radiation in non-technical "radiation safety" classes (we call them "the photon is your friend" training :-). That is not really accurate -- neutrons don't interact with electrons(*), and so cannot ionize directly. They can interact with hydrogen nuclei (protons), knocking them out of complex organic molecules, and leave behind ionized fragments and free radicals. The can also be absorbed by otherwise stable nuclei, making them radioactive; those new nuclei may in turn give off ionizing radiation.Neutrons lose energy much more slowly in passing through material, and so can penetrate much farther than ionizing particles or gammas. The nuclear interaction [http://en.wikipedia.org/wiki/Cross_section_(physics) cross-section] is much more important here than dE/dx (ionization) energy loss. Materials rich in carbon and hydrogen (for example, paraffin) are far more effective at neutron shielding than dense metals like lead.(* for the expert readers) Yes, there is n-e scattering through W and Z exchange, but the cross-section and energy scales are completely irrelevant to this discussion.
Posted by kelseymh 10 years ago | last reply 9 years ago
I have a 36"x80" solid wood entry door. I'd like to install a 12"x24" double pane glass unit in the door. What would the best way to do this?
Asked by gic3frank 8 years ago | last reply 8 years ago
Every time I select United Kingdom it changes to Zambia that is one more reason why I had Pay Pal you just can not trust it. five times I selected united Kingdom from the drop down list and five times it Changed to Zambia.
Posted by Liamthe1st 5 years ago | last reply 5 years ago
Http://soccer.live24hd.com/ Manchester United welcomes Fulham FC to Old Trafford on Monday in Premiership action that is sure to have implications on the title race. CLICK HERE TO WATCH LIVE CLICK HERE TO WATCH LIVE CLICK HERE TO WATCH LIVE The Red Devils are feeling the heat as Manchester City came from behind to rip the full three points away from Chelsea. They now sit just behind their rival neighbors making this game a must have for Sir Alex Ferguson's boys. For Fulham, it's all about jockeying for position higher on the table and securing some modicum of respect headed into the offseason. It is sure to be an engaging match so let's take a closer look. Where: Old Trafford, Manchester, England Watch: ESPN2 When: Monday, March 26th, 3 p.m. ET Manchester United vs Fulham live stream, Manchester United vs Fulham live streaming, Manchester United vs Fulham live, Manchester United vs Fulham stream, Manchester United vs Fulham streaming, watch Manchester United vs Fulham live, watch Manchester United vs Fulham online, Manchester United vs Fulham live stream, Manchester United vs Fulham live streaming, Manchester United vs Fulham live, Manchester United vs Fulham stream, Manchester United vs Fulham streaming, watch Manchester United vs Fulham live, watch Manchester United vs Fulham online Man Utd vs Fulham live stream, Man Utd vs Fulham live streaming, Man Utd vs Fulham live, Man Utd vs Fulham stream, Man Utd vs Fulham streaming, watch Man Utd vs Fulham live, watch Man Utd vs Fulham online, Man Utd vs Fulham live stream, Man Utd vs Fulham live streaming, Man Utd vs Fulham live, Man Utd vs Fulham stream, Man Utd vs Fulham streaming, watch Man Utd vs Fulham live, watch Man Utd vs Fulham online
Posted by DELETED_mrazu 6 years ago
I have extracted a peltier TEC unit from my small USB fridge. I intend to put the cooling unit into a bigger and more better casing so it'll cool other things rather than a can softdrink. The problem is, it's just getting 18' celcius and I need it to be lower than that. I've tried using a USB charger that outputs the usual usb 5V but 1 amp, the temp just goes down 1-2' celcius.I want to put a higher voltage power into the cooling unit, but I'm afraid that I'll just burn the thing out.But the problem is, I don't know the spec of the peltier unit that I have.So, can anybody tell me the maximum voltage and amps that the peltier unit can handle?The cooler loooks like this http://www.everythingusb.com/mini_usb_fridge_12625.html
Posted by hafizan89 9 years ago | last reply 9 years ago
I did not see any set up where brushes are used to carry the current from the generator to the stationary unit (Batteries, inverter, etc)
Asked by kawa1 9 years ago | last reply 9 years ago
Water is leaking from my Fedders a/c unit. I can't find any water tray or even how to open the unit. How do I empty the water?
When making an air conditioning unit, would it be possible to run the system through the inside of a mini-fridge, rather than a bucket of ice? maybe drill some holes and put the system inside, in a little bin of water.
Asked by roboman827 9 years ago | last reply 9 years ago
Can I use a split aircon AHU as a fan coil unit for a chilled water (hydronic) aircon system? Answered
I have been developing the idea (in my head) to build a chilled water aircon system using recycled parts. I have been considering using discarded "split aircon" evaporator units (AHU or fan coil unit or indoor units...diff nomenclature depending on geography) as the AHU's for my system. My question is simple (but the answer could be complicated) ....... would it work? Furthermore, does this make sense and would it work efficiently?
Asked by rum100proof 2 years ago | last reply 2 years ago
Is there a default PIN code to unlock Garmin nuvi 200? I aquired this unit in an unfortunet vehicle accident fatality?
The unit is locked and i have no literature or any info.