Hobby Electronics Basics

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~ OT? Dust in a computer

Any good solutions to keep the dust out? Anyone doing anything along those lines - and how's it working? I have a deskt...
13 comments posted 17yrs
posted by default
13 comments posted 17yrs posted by default

Stereo and bass signal into bass speaker cabinets

Hi, I would like to find a way to play both my stereo and bass guitar through a pair two 4x10" bass guitar speaker cabi...
3 comments posted 17yrs
posted by steverossiter
3 comments posted 17yrs posted by steverossiter

Transformer Simulation in LTSpice

I have just started using LTSpice . I am slowly learning how to use the simulator. I thought that I would try to simula...
3 comments posted 17yrs
posted by jalbers
3 comments posted 17yrs posted by jalbers

Pwr Supply Problem

I made a power supply with 3 paralelled LM338 Regulators in paralell (24V 12A trans), with 2 paralelled 20A rectifirs,...
1 comments posted 17yrs
posted by eb3354
1 comments posted 17yrs posted by eb3354

S-Video To RCA

I want an S-Video to RCA adaptor, but they aren't cheap, so I was wondering if I build my own, what pins to connect whe...
12 comments posted 17yrs
posted by the1930s
12 comments posted 17yrs posted by the1930s

Norton Resistance Question

Hi guys, I've gotten a lot of repsonses, but no real answers. To clariy, the text says to remove RL and short the sourc...
18 comments posted 17yrs
posted by radlee
18 comments posted 17yrs posted by radlee

RFI of 2 ATC radio of the same model

Hi all, wondering anyone have face any RFI issues for two ATC radio (same model) place in the same place with their ant...
2 comments posted 17yrs
posted by ralph
2 comments posted 17yrs posted by ralph

maximum length of wire?

I have some video equipment i need to power off directly from my car's battery. I need a wire that is not too big, beca...
11 comments posted 17yrs
posted by rose250
11 comments posted 17yrs posted by rose250

Hybrid-pi model parameter determination

I've been trying to determine the parameters of the hybrid-pi model for a given bjt transistor. Some books give the fol...
0 comments posted 17yrs
posted by jerry
0 comments posted 17yrs posted by jerry

Why Did This Battery Recharge?

My son's truck battery ran down, and I tried starting the truck by jumping my 600W powerpack across it. I heard the cli...
10 comments posted 17yrs
posted by notvalid2
10 comments posted 17yrs posted by notvalid2

Dram chips

I have some older circuits (from the '80) that I would like to build. The logic chips are still available. I have one t...
2 comments posted 17yrs
posted by aaron_stansbury
2 comments posted 17yrs posted by aaron_stansbury

puzzling grounded input

In this circuit: http://kitsrus.com/projects/k48.pdf Why is the other end of RV1 grounded? Thanks, Michael
9 comments posted 17yrs
posted by mrdarrett
9 comments posted 17yrs posted by mrdarrett

Low resistance

I need to measure the resistance of some motorcycle alternator coils They should be about 1.5ohm I have a cheap DVM, wh...
5 comments posted 17yrs
posted by user
5 comments posted 17yrs posted by user

Norton Resistance question

Can someone tell me (step by step) how to calculate the Norton's resistance for this circuit? (see picture below) http:/...
8 comments posted 17yrs
posted by radlee
8 comments posted 17yrs posted by radlee