Electronics help. I'm looking for a good informational/tutorial web site for working with high power LEDs 5 Watts and up. [more inside]
Where do I buy electronics components in southern Brooklyn (or lower Manhattan)? [more inside]
Can I learn anything useful from the circuit board of a nonfunctional infrared remote control? [more inside]
I'm making my first electronics project: a super-simple musical sequencer controlled by an Arduino and SNES Super Advantage. Can you help me out with some logistics/feasibility questions? [more inside]
How to I tackle replacing (rear) car speakers when there's a special connector? [more inside]
How can I solicit electronic equipment for short term loan for an NYC art exhibition? It is affiliated with a non-profit and reasonably high profile, I have a PR kit ready but am having trouble finding the right contacts (at Samsung, Sony, or Panasonic for example). I need a monthlong loan of a flatscreen LED display and in exchange can offer PR opportunities, exposure to a sophisticated arts audience, and VIP performance tickets - a lot to offer!
Please Hope me select a new TV. [more inside]
Pet peeve: hardened, twisted electronic cables that come with brand new products. How can you soften them? [more inside]
Looking for an wireless microphone system (lavalier style) that connects to a stereo minijack of a video camera.
Looking for an wireless microphone system (lavalier style) that connects to a stereo minijack of a video camera. [more inside]
Calling all electronics hobbyist people: I want to get (back) into making electronic stuff -- noise-making stuff, specifically -- as a hobby, help me get started. [more inside]
Noob electronics. I want to connect the following units. A Panasonic (old tube type, but nice big screen) tv, DVD player, and my MacBook Pro. The tv has one input, the VCR many. Do I need a 'modulator'? But more important, is there a way to get my digital downloads to the TV?
What's the real reason Blu-Ray players don't come in multi-disc carousel configurations? [more inside]
Can you help me find a specific digital video camera + wireless microphone combination? [more inside]
After resisting the call of the flatscreen tv for an embarrassingly long time, my boyfriend and I are finally saying farewell to our twelve-square-foot CRT and taking the LCD plunge. After much research we've settled on the Samsung UN46D8000, but I have two special-snowflake hardware concerns. [more inside]
I want to learn how to personally repair a Canon 5D with an internal power problem. What resources should I look into in order develop this skill set? I do not care that this is silly, uneconomical idea. I am also well aware of the fact that developing this skill set will not be overnight. [more inside]
I want to put together a list of every iOS app I've ever purchased. And I've purchased a LOT. I know I can go into my account information on Itunes and pull purchase history, but it only displays in small 'batches' at a time and I can't cut & paste from there. Next thought is to pull it from Itunes receipts in Gmail, but I don't want to have to go into each email & cut/paste into another document. Is there any way to concatenate all the emails automagically? Is there another solution for this I'm not thinking of?
Can you help me find an mp3 player with very specific qualifications? [more inside]
Is is safe to store flash media and other electronics in a tin? [more inside]
I'm trying to identify a +- 10 V cable for an electromagnet power supply I recently purchased. The manual calls it a "BR2" cable but I can't seem to find it anywhere... [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]
1960 grundig majestic stero console. features include am/fm radio with world wide access; phonograph(top of line). Information on back reads"Musical Instrument 9098/usa. Magnificient piece of furniture in mint condition. I paid $ 2000 dollars in1960. what is it worth today. Thanks
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!
My camera fell into a lake. Yikes! Took it home, let it dry in a bowl of brown rice and now it turns on (Yeah!) but the screen shows the view as a monotone blob of something. Help! [more inside]
Please recommend some decent outdoor speakers for under $200! [more inside]
Is there a tool online that might be able to tell me what parameters I would want for a new computer (probably laptop) given my current patterns of use? Looking in stores leads me to think I don't need the high end models but I'd hate to buy something only to find out I should have sprung for the extra RAM. [more inside]
Being an electronics wizard, what do you wish you'd known when you started out? [more inside]
I am trying to build a circuit to turn off an alarm when a passive infrared sensor detects a human in a room. Yes this is a bit backward but it is for turning off a door alarm when our receptionist is at her desk rather than detecting intruders. I know enough about electronics to just get myself in trouble (which isn't much), so any advice on parts and construction would be excellent. Thanks!
I want to drive 20ish LEDs, should I run them as series or parallel and why ? [more inside]
I was with a person that had an older style cell phone, I think it was an LG, but not sure. He was showing me pictures, but I was distracted with a series of around 10-12 numbers that were displayed on the screen, to the left and top of the picture area (not inside). They kept changing about once a second, each digit with no regularity. One would think that it may have been GPS coordinates but the numbers were too random and not changing in any particular sequence. What the heck was that? A tracking device? When I asked him what it was he very quickly deflected the question.
I can't quite get to the bottom of a USB peripheral auto-switching circuit diagram. [more inside]
Help me rediscover an electronics project from Radio Shack from back in the '80s. [more inside]
What is going on in LED lightbulbs? I mean the devices, not the industry. [more inside]
My USB Mic started picking up an omnipresent hum all of a sudden. It never used to. Any ideas what could have changed? [more inside]
Help me find a place to purchase this tiny car part for a Scion xB! [more inside]
How smart are smartpens? [more inside]
I am looking for an interesting or exciting video that would, in some small way, get Grade 7 kids excited about electronics or science in general. The video will be one part of a talk by Skype I'll be giving to a teacher friend's Grade 7 class. Ideally, the video would be less than 15 minutes and deal with electricity or electronics directly.
I tripped over an RCA cable connecting my amp to my laptop...and the RCA cable broke off, leaving the actual plugs stuck inside the amp. How the heck can I get them out? [more inside]
Help me identify a mystery component from the board of one of two damaged/crippled Nokia 6820 phones and determine if it's possible for me to get one working Frankenphone out of the two. [more inside]
Where can I get a replacement A1242 transistor? [more inside]
What are some reasonably complex and conceptually interesting electronics projects that I can make for my class? [more inside]
I'm trying to interrupt a standby timer on a DVD player for a homebrew projector dowser project and I need some help with capacitors and resistors. I've wired a momentary switch across the eject switch terminals to pop the cd tray from a distance. [more inside]
Where to source cheap LED strands? [more inside]
It's been cold recently (-15C) and I burned out two bulbs in my dutch bike's headlamp in a short time. Since the bulbs are hard to find, I thought this was a good time to replace the bulb with a 1-Watt LED light. What I built works, but I don't quite know why. [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]
I am looking for recommendations for DIY synth kits. I recently built the Weird Sound Generator and Voice of Saturn kits and am now looking for more to build. Does anyone here know of any similar noise-making PCB kits, or something else in general I should look into? Thanks.
How can I connect my TV (via my stereo system) to my wireless bluetooth speakers? [more inside]
Cheap wall USB charger seems to interfere with iPod headphones, do I just need a better charger? [more inside]
I'd like to use a single 5mm UV LED (3.4Vf, 20-25mA) to charge a daub of glow-in-the-dark paint. It only needs to be lit around 1 minute of every 10 (or 6 seconds of every 60), and only when the (room) lights are out. What battery/circuit would be most economical to operate, and require the least-frequent battery changes? [more inside]