Hobby Electronics Basics

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3 lamp light chaser

Hi Im looking for a circuit to control 3 lamps in a "back & forth" motion, ideally I would like the first lamp to take...
15 comments posted 22yrs
posted by sorry
15 comments posted 22yrs posted by sorry

low-droput regulator questions

i am a newbie at electronics and am trying to build this: http://www.geocities.com/CapeCanaveral/Launchpad/3632/pc_ther...
11 comments posted 22yrs
posted by damnesia
11 comments posted 22yrs posted by damnesia

Running 120V/60 devices on 220V/50

I posted this to sci.electronics but I get the impression that wasn't the best idea so I'm reposting it here. Hi, This...
2 comments posted 22yrs
posted by zentena
2 comments posted 22yrs posted by zentena

Low Volts High Current!

Hello everyone, I need some help, I have to convert voltage from a 12 volt car battery to 7.2 volts, BUT be able to dra...
36 comments posted 22yrs
posted by numanracing
36 comments posted 22yrs posted by numanracing

Help on circuit layout

I have drawm up a power supply on eagle, on bread board it all works fine, but when i did a single layer pcb it didn't....
17 comments posted 22yrs
posted by chrispol
17 comments posted 22yrs posted by chrispol

Idea 'bout Major project

Hi, Can someone provide me an idea about my engineering major project on communication or where to look for it? Thank yo...
2 comments posted 22yrs
posted by vaibhav.pareek
2 comments posted 22yrs posted by vaibhav.pareek

Timer chips?

Could anyone please post some info on timer chips? I'm looking for timers controlled by PC serial port. Need three time...
4 comments posted 22yrs
posted by slackin
4 comments posted 22yrs posted by slackin

WTB: Stag PP28 Programmer & MM8000 Trainer

I need the user manual/software for the Stag PP28 EPOM and EEPROM programmer. I also need the manual for the MM8000 8085...
0 comments posted 22yrs
posted by nihoa
0 comments posted 22yrs posted by nihoa

Capacitor Identification

Im stumped on two capacitors I can't quite figure out their size. They are small capacitors One side has 470 A1J the ot...
3 comments posted 22yrs
posted by news
3 comments posted 22yrs posted by news

car electronics - rectifier

I'm connecting some electronics to the power in my car. I know that the car electrical system can be a little harsh, so...
9 comments posted 22yrs
posted by warnockmREM
9 comments posted 22yrs posted by warnockmREM

LED control circuit

Hi Im looking for a circuit to control 5 banks of 4 LEDs I want to use a single potentiometer, so as you turn the pot t...
14 comments posted 22yrs
posted by sorry
14 comments posted 22yrs posted by sorry

Batteries

I hear that in Japan there is a Lithium Ion battery that does not discharge (at least it takes many years). How is this...
4 comments posted 22yrs
posted by crucifyself03
4 comments posted 22yrs posted by crucifyself03

WiFI card

For some reason my wireless pcmcia card on my laptop generates an irritating scratching noise on my speakers during dat...
1 comments posted 22yrs
posted by Rodneykelp605
1 comments posted 22yrs posted by Rodneykelp605