Dear makers, engineers, and hardware Mefites of all stripes: I'm working on an Abby Yates (Ghostbusters 2016) cosplay, and I want to make her helmet. It's a bit more complicated than Rick Moranis's was! Can you identify (and maybe even source) more pieces, particularly the square circuit board and round spool-like pieces? [more inside]
A dead family member has left us three Barnes & Noble Nook readers. They're not screen locked, but I seem to be unable to run updates or get into the Google Play store. How can we reset them and make the usable? Can they be repurposed to general readers for books under Kindle? Model numbers under the cut: [more inside]
I grind my teeth and want to stop. My current idea for how to stop is to find the right pressure sensor, hook up a set of them to a computer and make the computer klaxon every time it feels pressure. I know the basics of soldering, and I've taken an electronics class, though it was a while ago. I know how to write code. How do I learn what I need to know to be able to find and pick pressure sensors, wire them up, connect them to something that connects to a computer, and receive the signal in a computer program? Also welcome - other ideas for how to _stop_ teeth grinding. I've tried the SleepGuard and various supplements and drugs, but am always open to ideas.
Doing a tiny bit of electronics stuff, ordering resistors and capacitors and other components. The vendors' cool search engine has hundreds of options and lets me choose among manufacturers. Is there any way to know which manufacturers are best environmentally, or are at least trying/stating a policy/located in places with good regulatory oversight? [more inside]
In the house we're buying (hopefully), downstairs in the closet with the electrical panel, there is an an exchange of coaxial and data/phone connections. It's a bit more complicated and interesting-looking than anything I've dealt with in the past. Here are some photos. What is it? What is it used for? Can I do anything cool with it? [more inside]
I have a Technics Stereo Graphic Equalizer SH-8066 (circa 1985-1989), and the left channel is out. What is my first step in diagnosing the source of the issue? [more inside]
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]
I bought this waterproof iPod shuffle so I can listen to music while I swim laps. Sadly, I don't understand all the science involved. What is the likelihood this thing will electrocute me? [more inside]
I have an old school speaker, and I would like to be able to hook it up to my phone via bluetooth. I thought I had this solved, but is there a new way to do it? [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]
So I've enjoyed building computers as a hobby for years now. I enjoy putting the components together, reading comparison tests, looking at spec sheets and comparing prices, all that stuff. The problem is that I can't do it as often as I'd like because its too expensive! I need a hobby that's like building computer but is a lot cheaper. [more inside]
After completing some projects and aborting others, I've got some extra materials that would make someone very happy. Problem is, how do I find that someone? Is there an online forum or donation group or something? [more inside]
I'm sick of attending rallies and protests where the speakers are talking into an under powered megaphone and no one past the first row can hear. I'd like to purchase a nice, powerful, somewhat portable PA system to share with progressive groups in my city. I need your help since I know a fair amount about electronics but not much about audio. [more inside]
I just arrived in Krakow from Australia. My luggage did not. Insurance will cover replacement of everything if it hasn't turned up after 8 hours, which will be 5pm. I desperately need clean clothes, a laptop charger (Acer) and a phone charger before tomorrow as I am teaching a workshop. Have located places for clothes open until 10pm. What about the chargers? I am in the Old Town. [more inside]
I will be shipping a car in the US and this is estimated to take 4-6 days in an open transport. I will leave some things in the trunk (yes, I am aware it can be stolen). Since it is summer weather, the car may be potentially on the top, so it will be subject to significant heat, I wanted to ask if things such as hard drives and electronics will make it through the trip. Thanks.
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]
I've got a 1970s Nikko STA-5050 receiver/amp with tape, aux and phono inputs. Nowadays aux and phono seem to be used interchangeably but I know they used to be different specs. [more inside]
Please help me understand electricity and electronics. I have read the water analogy numerous times but I still can't quite grok it. Like "Ummm, Where does the water go and does it evaporate?" I have started tinkering with a Raspberry Pi and would love to build more complicated circuits with capacitors and transistors. [more inside]
I have a Gene Cafe coffee roaster that appears to have a dead motor (receives 12V, doesn't turn, shaft is frozen even with gear box removed). The company sells a replacement motor for $39, plus shipping that brings it to almost $50. I have a strong suspicion that this motor should cost around $10-$15. [more inside]
I have an old laptop to get rid of. How to best get a few dollars out of this? [more inside]
I want to buy an American Rock N Play (baby bouncer) that has a plug. Will it work here if I use a travel adaptor, or will it start smoking and explode? I copied this info from the manual "Requires an AC adaptor (input 120 - 240 VAC, 50 - 60Hz, with an output of 8 VDC) for operation (included)" [more inside]
I'm looking for a way to connect to standard 0.1" pitch PCB headers directly on the PCB without soldering in the header pins. Is there any kind of spring or barb-type contact designed specifically for this purpose? [more inside]
Our TV, a stately Sony Trinitron that's served us since 1999, is dying. We need a new 42 inch-ish TV. I have no idea what to look for in this new flat/plasma/HD market. All I want to avoid is that godawful HD thing where old movies look like cheap soap operas and everything is too sharp and flat. No interest in a smart TV or 3D or anything like that. What should I buy to make our media diet of old movies and Netflix TV shows look the best?
I'm looking for an internationally recognised ISO or IEC style standard or certification, against which I can have an electronic device tested and cleared for use. The temperatures involved are high, but not extreme. The device will be used within a metal enclosure in the Middle East. [more inside]
I've just moved into a new (to me) house. (The house itself is old and quite funky.) I brought with me my extant Macbook Pro (most-recent vintage). I'm finding that when my computer is fully charged and the charging cable is plugged in (green light), the house lights flicker. [more inside]
I enjoy building electronic kits, and am looking for a new one to work on. Ideally, I would like a reasonably complicated and advanced kit that will be more than an evening or two of work. Any recommendations?
I'm sure this is a stupid question, but I wondered. Why don't cell phones and other chargeable electronics charge multiple small batteries in parallel? The analogy is like this: * I have one cell phone with a large battery that takes 3 hours to charge. * I have three cell phones with small batteries that take 1 hour to charge. Why can't cell phones just have 3 smaller batteries and charge them all at the same time, and therefore make the charging faster?
What goes in an electronics technician's tool bag? [more inside]
Here are a couple of photos taken from inside our bathroom. I'm afraid I might seem paranoid, but we've been having an ongoing dispute with the neighbors who placed it there (which recently culminated in being forced to file a restraining order). Someone suggested it might be some kind of carbon monoxide or VOC detector, since they had accused us of letting smoke waft onto their property. But the window has remained closed thus so far, and there's something inside of it that glints like a camera lens when the light hits it just right.
I bought a few of these for a motorcycle project. I need to hook it up to a little arduino, but i'm used to breadboards, how does one hook this up? Do I need to solder these little connections? Btw, the project is to make custom signals tail lights for a motorcycle. I bought these hoping they would convert the 12v of the bike to 5v for the arduino.
I have $1400 to spend on a new computer. I have no idea what I'm looking for. Help? [more inside]
I want to start tinkering with electronics/mechanics/appliances, specifically stereo equipment (preferably vintage/obsolete). I have little experience and I've never thought of myself as one with a good sense of "electronics" or even "mechanics" nor do I have any kind of STEM background. What baby steps do I take to get started? [more inside]
I have an Arduino, and I want to make it do things. I gather that what I really want is a Raspberry Pi in addition to my Arduino. The trouble is, I don't know Python and my C and circuitry skills are severely rusty. So do you know of any online courses or physical books that will teach me all of this as a general subject of "making devices" rather than individual Python, C, and electrical engineering courses of study? [more inside]
I am after some good old collective internet wisdom on the best way to go about a LED light installation behind my headboard and bedside tables. Just wondering if anyone had done a similar project and could offer any tips, especially on the correct way that I should go about connecting the strips? [more inside]
Trying to run a DC motor with an Arduino UNO and a relay shield - need help with the code! [more inside]
Can anyone identify a manufacturer who makes these toggle switches? I'd like to get ahold of some, and want to know if they're still being manufactured, or, alternatively if there's a good source for them. This photo is of a Technics RS-263AUS cassette tape deck. Thanks for any help!
My desktop PC has taken a turn for the worst and after some troubleshooting I'm still not exactly sure whats going on. PC doctors of mefi - help! [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]
I'm selling almost everything I own so I can fit everything that's left into my car and travel for a while. The inside of my car can get volcanically hot at times, and I'm worried about storing my MacBook and iPad there. What can I do to keep them as cool as possible? Buy a cooler they'll fit in? Do I need to worry about condensation in that case? Any ideas would be very welcome -- thanks!
So I managed to get myself a job in a busy factory as an electrically biased maintanance man and need resources to help me become more up to scratch with what im dealing with. [more inside]
My husband likes to take electronics apart and put them back together (cameras, smart phones etc.). Right now his setup is ridiculous: he works (mostly) over a big tupperware container to catch the screws that fall into it, unless they fall on the floor, and he holds the flashlight on his iPhone with one hand while trying to wrestle tiny screws into place with the other hand. There has to be a better way; this looks painful. what can i buy him to improve his setup (lights, magnifiers, other things i haven't thought about)? What do you use in your efficient and effective home repair shops?
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]
Why does the signal keep dropping on my Wii? [more inside]
These are various .avi files from old which my player a Panasonic Blu-Ray DMP-BDT230 supposedly supports. It will 50% of the time but only show the picture and then a high pitch dog-level sound comes through speakers. It is connected via HDMI to TV with TV's audio output RCA to early 2000s receiver. [more inside]
My current house room setup doesn't make sense, and I'd like to move the media room to a different location. However, the only available wall for for TV/Xbox/Etc, is the wall that divides the kitchen and the living room; so the TV would be hung on the same wall as the microwave and stove, but on the other side, in a different room. (If that makes sense.) Is interference still a thing, or is most equipment shielded enough that this idea isn't a problem?
Is the control panel on my gas oven really completely fried after switching the breaker on and off? How can I prevent this in the future? [more inside]
My fiance sold and shipped some very expensive, heavy, one-of-a-kind electronics to an online friend overseas. They were damaged during international shipping. The purchase price was over a thousand dollars and the items are literally irreplaceable. Who is legally liable here? What are the ethics? We *cannot* afford to reimburse this expense. [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]
I'm trying to set up several micro USB charging stations in my house and car, and I'm realizing that I retain very little from 9th-grade Intro To Electronics. Set me straight on how current works? [more inside]