A rather large 63V .22F capacitor bank
Some of you may remember my post about a month back about the little capacitor bank made from random old electrolytics (http://bit.ly/Sc1oxN). That was fun, but I was left wanting for something more,...
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Just Try and Make Your Own Gun - Mehdi Sadaghdar
submitted by Pyronic_Chaos [link][comment]
View ArticleHas anyone taken MITx 6.002x?
MITx is offering it for the second time this spring and I consider taking it.My question is: does it teach how to actually build something simple (like a musical box or an amplifier)? What kind of...
View ArticleHow do I connect a 120V AC - 5vDC SSR to a breadboard?
How do I connect this SSR to my breadboard, and will the breadboard fry when I connect the 120V AC? Is there a right way to connect a SSR to house voltage? I just jammed it in the breadboard...
View ArticleWhat are some basic and "generic" components (like NE555, LM741) that can be...
submitted by iiiioooo [link][10 comments]
View ArticleFYI: I just added roger_ as a mod.
Recently I've been having trouble keeping up with the amount of work it takes to monitor the spam filter. (That thing has completely lost its little silicon mind...) Consequently, some good postings...
View ArticleLM317 question
hey guys. I am gonna keep it short. I am designing a programmable power supply with arduino, lm317 and op amps. going to use pwm for control. so here is the my dilemma:i can use 2 lm317, 1 as current...
View ArticleHow do I figure out what to feed / read from this motor assembly?
I have a motor that I've ripped out of a HP scanner. The motor is geared, and sits nicely on a drive track from the scanner. I was actually looking for a stepper motor, but this would be perfect if I...
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Lead-free solder, is there any current info on using?
So I'm interested in using lead-free solder. Most the information I am finding on the topic is a couple years old, and I figured it might be a good time to try and get some info on he subject. Seeing...
View ArticleNovice trying to make a DIY battery pack...what am I doing wrong?
Late to the game as I am with this, it occurred to me that I could spend a "little" (It's never a little) money and do this DIY battery pack thing folks seem keen to do in order to extend the...
View ArticleAdvice on low cost bench power supplies from ebay, can anyone vouch for...
Did a search in this subreddit and it's been a while since the last bench power supply thread. And I've seen a few generic low cost variable bench power supplies on ebay lately that suit my...
View ArticleLooking for replacement antennas, like 10 or so - discouraged by how much...
I've been looking for antennas for my project- 25-30" antenna, telescopic, chrome etc... The cheapest I've seen or $3-5 a piece (amazon/mouser). Best I found was some rabbit ears at goodwill (2...
View ArticleNeed a 5v power source...
I'm trying to fix a tv and I was testing the power supply. I noticed that a 5v lead wasn't producing any voltage and want to apply 5v to the circuit to see if it fixes the problem. The problem is that...
View ArticleSpeaker Jack Repair
The speakers that i bought have an audio jack that is attached at the subwoofer. Over time the jack must have taken some damage, and can only be coerced to play through both speakers after excessive...
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I am making a special light for my first electronics project and would like...
submitted by Lobsterplant [link][15 comments]
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So I recently acquired this Neurofeedback/Biofeedback Machine, Anyone know...
submitted by dirtjobrob [link][1 comment]
View ArticleWhat is the difference between a 16x2 and 16x4 lcd?
Hello,I am trying to interface a 16x4 lcd with an atmega32 chip. I wrote the following code which used to work for 16x2 lcd #include<avr/io.h> #include<util/delay.h> #define dataport PORTC...
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