Hobby Electronics Basics

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18 volt charger

The charger for my 18 volt rechargeable drill met with an untimely and violent demise this week, and I am trying to bui...
53 comments posted 20yrs
posted by gop4evr
53 comments posted 20yrs posted by gop4evr

LED brightness?

I'm wanting to purchase bright LEDs, but am confused by the specs. Am I correct in the following assumption? A 100mcd L...
18 comments posted 20yrs
posted by no
18 comments posted 20yrs posted by no

One giga ohms resistor

A customer next to me asking the shop assistant whether he sells one giga ohm resistor. I am wondering what is the pupo...
8 comments posted 20yrs
posted by mowhoong
8 comments posted 20yrs posted by mowhoong

Ink jet printer

Will an ink jet printer work for printing out artwork on a transparency for PCB exposure? I've been told it must be a la...
5 comments posted 20yrs
posted by rdavies
5 comments posted 20yrs posted by rdavies

Multiplexing temperature sensor

My engine has a temperature sensor on the right bank for the dash gauge, and a different one on the left bank for the e...
14 comments posted 20yrs
posted by jag_manR__EM*-0_V_E653
14 comments posted 20yrs posted by jag_manR__EM*-0_V_E653

SET tube amp and blowout?

Hey guys, I'm a noob to the world of DIY home audio, so please forgive any ignorance on my part. From what I understand...
5 comments posted 20yrs
posted by paul.t.moore
5 comments posted 20yrs posted by paul.t.moore

Has my PIC blown?

Hello there all, I am sort of new to the electronic world and wondered if any of you could help. I have a PIC16F84 and...
16 comments posted 20yrs
posted by silverfox.williams
16 comments posted 20yrs posted by silverfox.williams

Use of Extension Cord

Is there a specific reason why the instructions of some electrical appliances say not to use an extension cord? Some ap...
129 comments posted 20yrs
posted by littleboyblu87
129 comments posted 20yrs posted by littleboyblu87

From truth table to logic circuits

Given a truth table, is there a procedure to follow in order to draw the logic circuit? For two inputs, it is easy to gu...
2 comments posted 20yrs
posted by emelw
2 comments posted 20yrs posted by emelw

elegant way to make an 50 LED array?

I suppose I could just solder them all together in a big ugly mess. How do you people do it?
8 comments posted 20yrs
posted by leon.park
8 comments posted 20yrs posted by leon.park

balun?

What is a balun, and what for? How is it different than any other transformer? Thanks, Mark
7 comments posted 20yrs
posted by mark-t2
7 comments posted 20yrs posted by mark-t2

Any good magazines for Electronics?

I'd like to get a subscription to a good magazine, but not sure as to what's out there. I tried QST for a while, but go...
7 comments posted 20yrs
posted by hk5388
7 comments posted 20yrs posted by hk5388

Interface 4x4 matrix keypad to AT91EB55 board

Hi all, I'm new to this group and I'm hoping someone could please help with this issue. I'm trying to interface a 4x4 m...
10 comments posted 20yrs
posted by ramkrishna.swamy
10 comments posted 20yrs posted by ramkrishna.swamy