Hobby Electronics Basics

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type of switch on computer?

Hey all; A friend of mine wants to put a remote switch on his computer. The PS will already be on, it's just that he wa...
1 comments posted 21yrs
posted by toccata
1 comments posted 21yrs posted by toccata

AC Synchronous Motor

I want to use a synchronous motor at 120V 50/60Hz. I have a motor that I am using right now and it works fine at 60Hz b...
3 comments posted 21yrs
posted by learnfpga
3 comments posted 21yrs posted by learnfpga

Parts

I need some cheap sources for electronic parts in small quantities. I have some of those 50 in 1 kits to raid, but I'm g...
5 comments posted 21yrs
posted by julian814
5 comments posted 21yrs posted by julian814

A/D module input resistances

I've been shopping around lately for remote (USB/serial/ethernet) A/D input modules and so far the highest input resist...
3 comments posted 21yrs
posted by asdadsasd
3 comments posted 21yrs posted by asdadsasd

4 input NAND w/ 2 input NANDs?

Hello all.. I'd like to verify my thinking here and make sure I'm not missing something simple. I have a circuit that r...
7 comments posted 21yrs
posted by kleptein
7 comments posted 21yrs posted by kleptein

3 Phase - 3 Phases

In lieu of a 3 phase mains feed, can 3 independent single phase feeds be applied to a 3 phase transformer? In this scen...
4 comments posted 21yrs
posted by aaawelder
4 comments posted 21yrs posted by aaawelder

Video Balun

I'm sure some of you have seen the cat 5 to coax video baluns that let you run composite video over one of the 4 twiste...
3 comments posted 21yrs
posted by 1qazse4
3 comments posted 21yrs posted by 1qazse4

combining two pulse streams for counting

Suppose I have two sensors that give off a pulse every time an event occurs; I have a choice of negative-going or posit...
4 comments posted 21yrs
posted by nospam
4 comments posted 21yrs posted by nospam

Newbie Question: High Beam/Low Beam

Total and absolute newbie alert! I'm putting an old motorcycle back on the road and to pass inspection it must have bot...
10 comments posted 21yrs
posted by this_is_a_fake_address
10 comments posted 21yrs posted by this_is_a_fake_address

Use of 120 VAC neon mini lamp on 240 VAC circuit

I would like to use a Radio Shack # 272-704 120 volt neon lamp as an ON/OFF indicator on a 240 volt circuit (single pha...
19 comments posted 21yrs
posted by whatelse
19 comments posted 21yrs posted by whatelse

Floating DC power supplies

I have a floating AC/DC unregulated 48vdc (nominal) linear power supply ,just a transformer,rectifier bridge and filter...
11 comments posted 21yrs
posted by philinsingers
11 comments posted 21yrs posted by philinsingers

Beginner's dilemma

Hi, I just took-up electronics as a hobby. Purchased a breadboard and a few jumper wires(?). And am waiting to light-up...
7 comments posted 21yrs
posted by OldBuzzard
7 comments posted 21yrs posted by OldBuzzard

PIC micro ringing power supply

I am playing with PIC microcontroller 16F628. I am seeing high frequency ringing on my power supply with nothing else h...
12 comments posted 21yrs
posted by ednspace
12 comments posted 21yrs posted by ednspace

Tri-Color LED Computer Header Problem

Ok. I've built a PC and crammed it into a Nintendo case. What I want to do is hook up a single Tri-Color LED to my moth...
3 comments posted 21yrs
posted by sbbowers
3 comments posted 21yrs posted by sbbowers

can some identify this transistor please

D140 G (or 6). There a ".T" marking on it too. I've done several searches but can find a datasheet (or pinout) for this...
3 comments posted 21yrs
posted by dave
3 comments posted 21yrs posted by dave