715 posts tagged with Electronics.
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Pick a Protest PA system for ~500 people

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]
posted by ChrisHartley on Jul 10, 2016 - 10 answers

Shop open in Krakow past 6pm where I can buy chargers

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]
posted by lollusc on Jul 9, 2016 - 6 answers

Can electronics, hard drives survive in a car for a week?

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.
posted by eliluong on Jun 23, 2016 - 10 answers

Recommendations on a small bluetooth speaker?

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]
posted by Anticipation Of A New Lover's Arrival, The on May 19, 2016 - 16 answers

Historically, what's the difference between Aux and Phono?

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]
posted by sodium lights the horizon on May 5, 2016 - 12 answers

Electricity / Electronics for Dummies

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]
posted by jasondigitized on Apr 27, 2016 - 7 answers

Looking for a less expensive replacement DC motor for Gene Cafe roaster

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]
posted by ChrisHartley on Apr 22, 2016 - 1 answer

Can I salvage $50 out of this dinosaur?

I have an old laptop to get rid of. How to best get a few dollars out of this? [more inside]
posted by DoubleLune on Mar 27, 2016 - 8 answers

Buying an American Rock N Play for use in Germany

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]
posted by catspajammies on Mar 9, 2016 - 2 answers

Contact for connecting to PCB header through-holes

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]
posted by Behemoth on Feb 3, 2016 - 7 answers

Best New TV For Watching Old Movies?

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?
posted by The Whelk on Jan 28, 2016 - 17 answers

Standards for the operation of electronics in high temperatures?

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]
posted by MintSauce on Dec 29, 2015 - 10 answers

Laptop charged, house lights flicker. What's going on?

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]
posted by wemayfreeze on Dec 7, 2015 - 16 answers

recommendations for electronic soldering kit

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?
posted by fimbulvetr on Dec 1, 2015 - 7 answers

Why don't they charge small batteries in parallel?

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?
posted by jonclegg on Nov 16, 2015 - 8 answers

Electronics tools

What goes in an electronics technician's tool bag? [more inside]
posted by pH Indicating Socks on Nov 7, 2015 - 31 answers

Can anyone identify this device pointed at our bathroom windows?

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.
posted by prosopagnosia on Nov 1, 2015 - 34 answers

How do I hook up this kind of chip?

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.
posted by jonclegg on Oct 27, 2015 - 10 answers

Help me NOT beanplate a computer purchase!

I have $1400 to spend on a new computer. I have no idea what I'm looking for. Help? [more inside]
posted by youandiandaflame on Oct 27, 2015 - 14 answers

Tinkering with electronics & mechanics: getting started

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]
posted by nightrecordings on Oct 2, 2015 - 10 answers

Teach me to robot.

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]
posted by cmoj on Sep 16, 2015 - 5 answers

Advice for LED light installation

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]
posted by Shibui on Sep 13, 2015 - 7 answers

DC motor control with Arduino and relay shield- coding question

Trying to run a DC motor with an Arduino UNO and a relay shield - need help with the code! [more inside]
posted by AutoPilot83 on Jul 29, 2015 - 11 answers

Trying to find these vintage-style toggle switches

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!
posted by dmalashock on Jul 22, 2015 - 8 answers

It's the "Which one of my components is screwed up?" game!

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]
posted by ajax287 on Jul 17, 2015 - 13 answers

What caused these wires inside our TV to turn into charcoal?

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]
posted by fermion on Jun 16, 2015 - 11 answers

Keeping sensitive electronics cool in a car

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!
posted by jeffcovey on May 25, 2015 - 16 answers

(preferably print-outable) resources for a budding electrical technician

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]
posted by aqueousdan on May 22, 2015 - 2 answers

What would make tiny electronics repair more comfortable?

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?
posted by andreapandrea on Apr 14, 2015 - 27 answers

What computer do I want?

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]
posted by annie o on Apr 12, 2015 - 17 answers

Wii signal dropoff

Why does the signal keep dropping on my Wii? [more inside]
posted by roll truck roll on Mar 17, 2015 - 4 answers

Blu-Ray inconsistently plays .avi movie files with high pitch screech

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]
posted by chicaboom on Mar 14, 2015 - 5 answers

Do microwaves still screw up other electronics?

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?
posted by dejah420 on Mar 9, 2015 - 8 answers

Gas oven control panel fried?

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]
posted by miyabo on Feb 28, 2015 - 3 answers

Collectible items damaged in international shipping. Liability?

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]
posted by Rach3l on Feb 24, 2015 - 17 answers

Monitor "fades out" slowly into vertical lines

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]
posted by IAmBroom on Feb 16, 2015 - 8 answers

Remedial electronic engineering filter: how does USB charging work?

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]
posted by foursentences on Jan 28, 2015 - 7 answers

What Kind of Glue Can I Use in Electronics?

So - I need to epoxy some wire back into a tiny plug. The old one holding it was whitish. Can I use regular epoxy or do I need some kind that it especially made for electronics? Thanks
posted by watercarrier on Jan 19, 2015 - 10 answers

Viable Electronic Engineering job - Product Development Engineer?

Recently got offered a new job in the area of electronic engineering (I think anyway!).... [more inside]
posted by b3vcard on Jan 18, 2015 - 3 answers

What's the cause of this electrical hum in my cheapo tube amp?

video of the issue, details within. [more inside]
posted by colin_l on Jan 16, 2015 - 10 answers

Arduino/Christmas lights projects for beginners

What are some good Arduino projects involving Christmas lights for someone new to microcontrollers? [more inside]
posted by DakotaPaul on Jan 2, 2015 - 9 answers

Good consumer electronics stores in South Jersey?

My mother-in-law's TV is out of HDMI ports. I need a switch and a cable. I can't order online-- I need to be here to set up, and leave early Monday. Best Buy/Radio Shack are last resorts. [more inside]
posted by Mayor Curley on Dec 26, 2014 - 5 answers

Will a japanese turntable work in the US?

Recently I found a good deal on a direct drive DJ turntable which was manufactured for the japanese market. I know japanese consumer electronics run on 100V while US runs on 120V. I have heard conflicting things on whether this would be an issue. It seems like the turntable would likely run but I have heard some reports that this difference in voltage might eventually damage it. Is a power adaptor a permanent solution to this problem? Is a power adaptor even necessary?
posted by bigspoon on Dec 16, 2014 - 3 answers

Electricians of AskMe: Help, my desk keeps shocking me!

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]
posted by taromsn on Nov 30, 2014 - 6 answers

EarPods That Work

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]
posted by incolorinred on Nov 28, 2014 - 10 answers

Comparing Similar 7 inch tablets

Hi - I'm hoping for a bit of help comparing two similar 7 inch tablets that are on sale this Black Friday. [more inside]
posted by stewieandthedude on Nov 24, 2014 - 7 answers

HELP! HAL is in my IBM!!

I just picked up an IBM electric typewriter from a salvage shop. However, as you can see HERE, there's something a little bit strange going on. Any electricians out there who can give me some insight? Thanks!
posted by crazylegs on Oct 24, 2014 - 6 answers

PCBA Oy Vey

There are a ton of printed circuit board assembly companies in Asia. How do I choose one? [more inside]
posted by Dansaman on Oct 16, 2014 - 5 answers

Replacement knobs for old receiver - DIY or other?

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]
posted by chicaboom on Sep 13, 2014 - 6 answers

Vintage Record Player Whisperers Wanted

I have acquired a gorgeous vintage record player, which I would like to either repair myself, or find someone to repair in the Chicago area. [more inside]
posted by shaka_lulu on Sep 10, 2014 - 8 answers

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