Hobby Electronics Basics

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Sn/Pb plating on heat spreader

I have two different types of cubical heat spreaders. There is a Sn/Pb plating layer on each surface of heat spreader....
4 comments posted 22yrs
posted by ahkit1021
4 comments posted 22yrs posted by ahkit1021

Help reading capacitor code values

Hi, I have a bunch of silver (colour), axial lead capacitors. They are about the size of a 1/4 - 1/2 W carbon resistor....
3 comments posted 22yrs
posted by user
3 comments posted 22yrs posted by user

scr latchup CMOS failure?

I've been testing the watering circuit i built: http://skullcap23.tripod.com/daily-water3-bw.png http://skullcap23.trip...
10 comments posted 22yrs
posted by news4
10 comments posted 22yrs posted by news4

how to connect this laser pointer to wall outlet?

what kind of power converter would i need to connect 3 of these laser pointers to a 110 volt wall outlet? http://store.y...
6 comments posted 22yrs
posted by See.My.Sig
6 comments posted 22yrs posted by See.My.Sig

Monolithic ceramic capacitors

I'm getting ready to order some capacitors in the range of 1pF to 1uF and see that both regular ceramic and monolithic...
1 comments posted 22yrs
posted by alchemcj
1 comments posted 22yrs posted by alchemcj

Resistor packs

Hi, I am working on a logic board that uses resistor packs. I'd like to know what they are without having to desolder t...
1 comments posted 22yrs
posted by sshuvalov
1 comments posted 22yrs posted by sshuvalov

Electronics Design URL?

I need URL of any educational website that features 1. Basic AND OR , etc. gates in electrical schematics as well as in...
1 comments posted 22yrs
posted by newsreader99
1 comments posted 22yrs posted by newsreader99

12V pulse to serial port

I need to read a 12v pulse from a serial port, Can I connect that 12V pulse directly to the serial cable (Receive pin) a...
2 comments posted 22yrs
posted by arriane82
2 comments posted 22yrs posted by arriane82

Identify this PIC Programmer?

Hi A friend of mine recently gave me a PIC programmer that he used a few years ago as part of a course he did at univer...
5 comments posted 22yrs
posted by nospam
5 comments posted 22yrs posted by nospam

load impedance of amplified ear

Hi, I am still having trouble with my amplified ear. I noticed that my headphones have a dc resistance of 16ohms per ea...
2 comments posted 22yrs
posted by pil
2 comments posted 22yrs posted by pil

Cheap Home Generator Questions

I am building a generator using multiple auto alternators and understand (I think) that wiring them in parallel will co...
3 comments posted 22yrs
posted by jwillsi1
3 comments posted 22yrs posted by jwillsi1

Estimating transfomer current rating?

I have a salvaged transformer and I'd like to estimate its max current rating. I've just installed it in a home-brew po...
29 comments posted 22yrs
posted by terrypinDELETE
29 comments posted 22yrs posted by terrypinDELETE

clothes dryer woes

I have a Kenmore electric dryer that went on the blink this weekend. I set the timer (which I can hear running) and pus...
3 comments posted 22yrs
posted by bj_weller
3 comments posted 22yrs posted by bj_weller

circuit needed

Could someone suggest a simple circuit that would light an led for about 2-4 seconds when power is applied and then tur...
8 comments posted 22yrs
posted by Jamie4
8 comments posted 22yrs posted by Jamie4

Problem with a Rin measuer

Hi,I have a problem with this circuit http://digilander.libero.it/checco23/Schemi/Per_sito1.GIF , I try first to calcul...
2 comments posted 22yrs
posted by roxfNOSPAM
2 comments posted 22yrs posted by roxfNOSPAM