Hobby Electronics Basics

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Driving a LED from an IC

Hello. I have successfully used a transitor as a switch to drive a LED from an Intel PXA255 CPU, pretty much exactly li...
2 comments posted 20yrs
posted by njsand
2 comments posted 20yrs posted by njsand

simple electric car

I was thinking of building a simple electric car. Basically, it would be 4 DC motors, a switch, a battery, and a potent...
6 comments posted 20yrs
posted by bob
6 comments posted 20yrs posted by bob

help with 555 schmitt trigger resetting

Hello I have built this basic sound to light 555 schmitt trigger circuit The circuit I am using (see fig.9) is at this...
10 comments posted 20yrs
posted by alex
10 comments posted 20yrs posted by alex

OT: RC boat info wanted

OK, I know this is a bit OT, but I hope someone can point me to a group or forum that's more appropriate.... My soon-to...
2 comments posted 20yrs
posted by yan
2 comments posted 20yrs posted by yan

How Do You Sort Your 7400 Series ICs?

I just got a 7400-series assortment from Jameco. Looks like there's a lot of neat stuff in here (I'm still going throug...
15 comments posted 20yrs
posted by blahbleh666
15 comments posted 20yrs posted by blahbleh666

current limiting smps

Please bare with me, im technically a newbie to electronics, being that im not aware of all the different circuits. How...
10 comments posted 20yrs
posted by vpalazzo
10 comments posted 20yrs posted by vpalazzo

PICkit 2

Well, I picked up the PICkit 2 developer, and it's a good little system. Now I need to move on to the next step; I've p...
0 comments posted 20yrs
posted by randy.day
0 comments posted 20yrs posted by randy.day

Frequency pair

Can someone explain me what do we mean by the term frequency pairing? I met the term in an avionics book.The phrase is...
3 comments posted 20yrs
posted by papageorgiou40
3 comments posted 20yrs posted by papageorgiou40

Problems with building an ESR meter

I built an ESR meter according to this link: http://www.ludens.cl/Electron/esr/esr.html As I completed building its ele...
4 comments posted 20yrs
posted by simo.kaltiainen
4 comments posted 20yrs posted by simo.kaltiainen

what is the joule rating on surge protectors?

Hi, I have a question about the joule rating on surge protectors. From some information I found on the net, this is the...
47 comments posted 20yrs
posted by j_joensuu
47 comments posted 20yrs posted by j_joensuu

Touch-switch mouse for RSI sufferers

I have cheaply modified a commercial trackball to operate with a touch-switch rather than a button (which requires pres...
3 comments posted 20yrs
posted by pdm_joker
3 comments posted 20yrs posted by pdm_joker

using a motor as a generator

I already posted this in another group but got no response, oh well i dont want to talk to them either I have a project...
10 comments posted 20yrs
posted by vpalazzo
10 comments posted 20yrs posted by vpalazzo

common mode rejection ratio

Let's say you're measuring voltage across a sense resistor on a dc line where the voltage with respect to ground fluctu...
13 comments posted 20yrs
posted by kellrobinson
13 comments posted 20yrs posted by kellrobinson