Someone recently broke into my car at night. I can't afford to install a true car alarm. Instead, I'd like to put a bright red flashing LED on my dashboard. [more inside]
Back in the late 80s, early 90s I bought a game from a yard sale. It was an electronic game, that took your birthday and created all sorts of astrology information. It was round, and a dark burgundy color. My Internet searches have been fruitless.
I want to make some figurative sculptures, roughly life-size. I'd like to have the eyes be displays showing video recordings of actual human eyes looking around and blinking. I'm not sure what to use for this. [more inside]
I'd like to get a little bluetooth speaker that I can keep in my bag, for all-purpose music listening. What can you recommend? [more inside]
We just bought a Vizio E550VL LCD TV on Craigslist. We tested it before buying it, of course, and it worked fine; we brought it home and watched an episode of Game of Thrones on it, and it continued to work fine. The next morning when we turned it on, the screen brightness starting flickering badly, and a little while later the screen stopped turning on at all. When we opened it up we found this charred wiring (note blackened housing and brown spots on circuit board.) What should we do? [more inside]
So, my 15mo old daughter poured a cup of coffee in my 2011 Mac Book Pro, and now the keyboard and none of the ports work. I am trying to figure out what to replace it with, if anything (at the moment). [more inside]
I have a refurb monitor that's starting to go bad: the screen will fill with vertical color lines that don't change once they appear. Cycling the power almost always fixes it, but it's starting to happen more often. There are three boards inside - which is the likely culprit? [more inside]
A few months ago I moved into a new apartment, and decided to get one of these industrial shelving units - something like this to use as a desk/bookshelf/musical gear shelf. Everything works great, except when I plug my macbook into its charger and start typing. If my hands are on the aluminum body of the macbook and my wrists brush up against the metal frame of the shelving unit, I get a sharp shock, nothing too bad, but painful and annoying. [more inside]
I recently purchased the Iphone 6 and love using it, but the EarPods do not work well for me. Help me find an alternative. [more inside]
I am thinking of getting a friend's old Realistic receiver (Realistic STA-65C, I think). I am not of the nature that I need an exact model replacement of the treble knob and am curious if there is a place online or a store like Home Depot or Radio Shack that might sell knobs that could fit or made to fit. I know eventually I may find one on ebay but don't need it to be a perfect match nor spend too much. [more inside]
I have this USB DAC/headphone amp (which is great). I just started using the RCA outputs for a pair of powered monitors (also great). The problem is that the DAC switches between the outputs based on whether the headphones are plugged in. This makes sense, but it's annoying. I want to hack it and switch between them manually. Electronics whizzes, check my reasoning. [more inside]
I inherited this rice cooker but cannot figure out what buttons to use to make regular short grain Asian rice. I thought it was the large one on the right but the rice is gross and uncooked yet soggy. Can you help? I looooove rice and need to remedy fast. Thanks for your help. Can you tell me what all of these buttons mean? I can't find a mode number so I can't look up the operating instructions online.
I just gave all of my personal electronics an (accidental) bath. Are they all ruined? [more inside]
I need basically this. I'd rather order it from closer to home. My searches for this type of cable in the US haven't turned up anything, and I don't know enough about electronics to figure out what other names it might go by. I think it's a common type of cable so there must be something I'm missing. Thanks!
I want to learn how to build something like this. Starting from nothing, what kind of skillset will I need to acquire?
Is it feasible to take apart, modify, and put back together again a hair dryer so that it works in reverse, that is, become a small vacuum? I assume I would have to make the blower work backwards to become a sucker, and I would have to direct debris into a little sack and away from the blower and power source. If I were going to do it, what would I do? How much work would it be? How ugly would it be, assuming rudimentary skills and a home workshop? If it's impossible-- why?
How do I safely and (pretty) cheaply implement this one-off home electrics / electronics project? I have a low-wattage controller that will drive a high-wattage load having to do with the heating of water. I already have a GFCI extension cord that will stand between EVERYTHING and the wall outlet. The main complicating factor is that this is a single, custom-built thing so I need to use off the shelf pieces for a housing, etc. [more inside]
What are the downsides, or dangers to my TV, of putting my TV in a bay window? [more inside]
We have a foscam webcam with night vision and the works. We can access it via wifi on our phones and computers, but want a dedicated screen to use as a baby monitor. Portable and/or plug-in... what are our options? Thanks!
I have a 9v battery powered water leak detector (this one: http://www.glentronics.com/water_alarm.htm ). I'd like to open it up and replace the audible alarm with an led. How do I do that? [more inside]
What are these mounting holes called? Is there any kind of plate or bracket I could buy that would allow me to retrofit them onto a device that does not have them, without drilling into the device?
I have a costume helmet that I'd like to have a forced air ventilation system for. I would like a small, low power fan (maybe from a laptop or small computer?) that I can run on batteries. [more inside]
We have an alarm for a door that sounds constantly while the door is open. It is run from a 9v transformer that plugs into the wall and the circuit is triggered with magnets on the door. I would like to install volume control for the alarm. Is the correct device a potentiometer? If so, how do I select the correct one? Thanks!
What's the name of this circuit that I need to build or buy? [more inside]
Should I buy a TV off of Craigslist? [more inside]
It looks thusly. My issue is that, despite the fact that it was originally barely taped down at all, I am unable to successfully, reliably reattach it using the same method. ("it" in this case being the printed black strips on the left). I am reasonably sure that lack-of-contact is my problem, because if I physically hold the cable to the board, it will reliably work when I push a button. Best I can do is that sometimes, after putting it all back together for the Nth time, one button will work. Maybe other buttons on its side will work, maybe not. Maybe it'll work for a few presses and then quit. The cable looks fine, the board contacts look fine, no amount of scotch tape is helping me out here. How do I affix these suckers but good?
I want to use a timer (minimum on time is one minute) to turn on my coffee maker. The ON-OFF button on the coffee machine is a momentary contact push button which is read by a logic board. Can I use the (isolated) relay contacts on my timer to close that push button for one minute, the minimum on-time of my timer? [more inside]
I'm trying to fix my phone. How do I deal with a very tiny, hard to get at screw with a stripped head? [more inside]
I have a pair of Monster Inspiration. I'm trying to play Madness by Muse but if I plug the headphones completely into the iPod or computer, I can't hear the vocal parts at all. If the jack isn't completely in, then I can hear it perfectly. Why is this happening?? [more inside]
I want to watch videos from a yoga website (Yogaglo) on my TV. The tools I have available to me are: MacBook, xbox 360, and Apple TV. Can I make it happen? [more inside]
Your best hacks for cleaning filthy items such as computers, electronics, tools? [more inside]
Snail trails on Garmin Nuvi 255W. When out and about this device is now making pale blue 'snail trails' on the map tracking the car from A to B. It is working as it should otherwise. Does this mean that the device is on its way out? I checked some forums but could find any mention of this bizarre behavior.
What ambient temperatures are safe for typical consumer electronic devices? [more inside]
What kind of IC is this? Picture shows a TO-220-3 IC with the label S9010, B5 and a manufacturer logo of a sort of stylized C. It is installed in the Q1 position so I assume it is a transistor. [more inside]
What laws or rules govern automobile door locks in the United States? [more inside]
Does flipping a switch on and off rapidly damage electrical equipment? [more inside]
Help me choose the right small HDTV. [more inside]
What could/should my friend and I build first with an Arduino starter kit or two? [more inside]
Best camera for indoor/low light conditions about $500ish --without use of a flash preferably. Difficulty: Must be available at Best Buy or somewhere immediately available. [more inside]
Where can I get a replacement motor for my vintage Christmas color wheel? [more inside]
How to I tackle replacing (rear) car speakers when there's a special connector? [more inside]
Please Hope me select a new TV. [more inside]
Help me find a place that can do quality speaker/subwoofer repairs in the Los Angeles area. [more inside]
Is there a way to directly download a coded configuration from an FPGA board to a computer? [more inside]
What are some cool things I can do with an arduino, Python and stuff I already have, with only a few new parts? [more inside]
How do I replace a blown woofer in a Spica TC-60 loudspeaker? The datasheet is here. I am generally capable, but don't know anything about building/repairing speakers. Can I get away with replacing just the one? Is there any danger of damaging the crossover (whatever that is)? The very nice guy from Madisound recommended a ScanSpeak replacement but how do I know if it will fit and/or work properly? If I'm reading the datasheet correctly, the original seems to be 180mm in diameter, and the replacement he recommended 170mm - is this a good idea? How can I tell if there's anything else I should try? What, if anything, do I seem to be overlooking? Thank you!
I want to drive 20ish LEDs, should I run them as series or parallel and why ? [more inside]
What is going on in LED lightbulbs? I mean the devices, not the industry. [more inside]
Where can I get a replacement A1242 transistor? [more inside]
Today I bought a Nokia 2730; stupidly, I took the battery out before taking it home. Now, even though it says the battery is charged, the phone won't work. Help! [more inside]