200 in 1 Lab kits anyone have one and can tell me about the instruction quality
I'm planning on buying a 200 in 1 electronics lab kit for my nephew (elenco MX907/ maxitronix / various other brand names) however the 300 in 1 and 500 in 1 versions of these seem to have fairly scant...
View Article3.3V dc/dc boost converter help
Hey /r/electronics! I've been trying to get a dc/dc boost converter working for some time. I'm using the microchip MCP1624 dc/dc boost converter, with the recommended components. I'm even using the...
View ArticleNeed help soldering old motherboard connector onto new heatsink (wire colors...
I decided to fix up an old Dell Dimension 4600 I got for free so it could play some newer games and HD video. 2gb of ram and an HD4650 sped it up a bunch, but the current Pentium 4 is bottlenecking the...
View ArticleRF question: Could cell phones be used to communicate on their own little...
Reason I ask, my buddies and I are looking at buying bluetooth helmet headsets for a motorcycle trip. We would simply be bluetoothing them to our phones for music and phone calls, but then the headsets...
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Replacing a CFL backlight in a 19 inch TV?
I have a TV that decided to stop working and as it turns out, the LCD panel itself is just fine. The only part that doesn't work is the backlight. I believe the CFL bulbs burned after being connected...
View ArticleProcessor question!
Hello, redditors! I have a question regarding processors. I really wan't to understand how processors work at the most basic level, so that my understanding of the topic can evolve. I was thinking...
View ArticleEfficient way to double encoders on a Teensy++?
Hello - I'm a beginner with electronics and trying to learn a bit by planning out a MIDI controller design. I've posted a few questions over the past few days with a lot of helpful and friendly...
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[help] Output transformer frequency response
I'm looking to create an output transformer for a tube amp and am wondering what the factors are that influence the frequency of a transformer. I understand the concept of magnetizing inductance,...
View ArticleDid any of the old test equipment engineers at Tektronix, HP, etc. ever write...
I'd love to learn how their clever circuits worked, and how they extracted every bit of performance from a few resistors and transistors. submitted by roger_ [link] [2 comments]
View ArticleMaking electricity lesson plan fun for kids
I have to explain the concept of electricity to children and I need some fun, easy and cheap experiments to do which will involve the kids and get them to like the topic. Thanks submitted by joduor2...
View ArticleQuestion about robot arm construction. Challenge?
Hey Reddit! So I'm building a robot arm for my schools Science Olympiad team, and was wondering if you guys had any ideas on how to make the arm using only four servos. So far, I have a 360 degree...
View ArticleProbably a stupid question; is there any audible difference when an audio...
Title says it all. I need to run a guitar signal through an inverting op-amp and am just wondering if inverting the signal creates any audible difference? Thanks. submitted by lambslaw [link] [29...
View ArticleLearning about voltage references
I want to study about the Bandgap Voltage reference and use it in somewhere. But first I would like to learn more about the basics of generating and using voltage references (mostly for op-amps). What...
View ArticleWhat parts to get for a beginner? I have another 12 hours to make a list
Hello! Tomorrow I will be making a trip to the part store. I have to go to a medical 'Rehab' kind of thing for a few weeks, so this will be my last trip for about a month or so. I wan't to have a basic...
View ArticleWall wart strangeness...
I bought a new 120AC -> 9vDC 300ma output wall wart a few weeks ago and have been using it exclusively with an audio circuit I designed and built. (The nature of this circuit is probably irrelevant...
View ArticleIs there a readily available P channel MOSFET with ~0.0075Ω Resistance?
I'm looking to switch the fuel pump on my car with a P channel MOSFET. The fuel pump will draw no more than 20A, probably more like 8-10A in practice. It's a normal brushed motor, so expect a spike...
View ArticleMaking a music box.. but with electric movement/speakers... Please help!!
I want to make a music box that plays a song when opened.. but instead of a mechanical movement to play it. It will simply be a circuit board attached to a set of small speakers which will...
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