Hobby Electronics Basics

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LM317 wrong output voltage

Hi everyone, I must state first that I'm a total beginner in electronics. I have a problem with a simple Ni-Cd battery...
8 comments posted 22yrs
posted by mullah
8 comments posted 22yrs posted by mullah

OP Amp Oscillations/Feedback

When employing an op amp in a negative feedback configuration, phase shifts due to the feedback loop, and the op amp it...
9 comments posted 22yrs
posted by sonnichs
9 comments posted 22yrs posted by sonnichs

Making a flyback transformer

I'm putting together a simple coilgun but want to make the circuitry easier to see than if I simply pulled the transfor...
1 comments posted 22yrs
posted by tseero
1 comments posted 22yrs posted by tseero

PCB Layout software - what to use?

Looking for suggestions on what to use for doing up some pcb layouts. I am doing up some simple circuits for guitar eff...
8 comments posted 22yrs
posted by user
8 comments posted 22yrs posted by user

What is DC jack?

Dear All, Could you please tell me more about DC jack? What is that? connector? Thank you very much. Best regards, Boki.
2 comments posted 22yrs
posted by bokiteam
2 comments posted 22yrs posted by bokiteam

ASCII schematics from LTSpice

I've just posted up an initial web page that includes my short program for converting LTSpice schematics into ASCII one...
8 comments posted 22yrs
posted by jkirwan
8 comments posted 22yrs posted by jkirwan

Reverese polarity of electromagnet

I have a simple battery/electromagnet setup. Does anyone know how I could set up a switch to reverse the polarity of the...
8 comments posted 22yrs
posted by smpaladin
8 comments posted 22yrs posted by smpaladin

sum of signal noise ratio?

If you have two system, one SN is a, another is b. If they are summed, what is SN? Assuming they can be summed for same...
2 comments posted 22yrs
posted by bighuiw
2 comments posted 22yrs posted by bighuiw

dc-dc atx power supply question

I have two of these R100D1205-12TS (http://www.aconinc.com/pdf/R.pdf)and I want to use it to run a computer on a car ba...
2 comments posted 22yrs
posted by returnoftheyeti
2 comments posted 22yrs posted by returnoftheyeti

high voltage by 78

How could I regulate 190 V DC whit a 78xx? I knew these devices can be used at this high voltage. -- MEMENTO AVDERE SEMP...
15 comments posted 22yrs
posted by vexator_nospam
15 comments posted 22yrs posted by vexator_nospam

high voltage by 78xx

How could I regular 190 V DC whit a 78xx? I knew these devices can be used at this high voltage. -- MEMENTO AVDERE SEMPE...
0 comments posted 22yrs
posted by vexator_nospam
0 comments posted 22yrs posted by vexator_nospam

inkjet circuitry

I'd like to understand the circuitry that accompanies canon cartridges. Has anyone found a good tutorial site. thanks AP...
3 comments posted 22yrs
posted by not_here.5.species8350
3 comments posted 22yrs posted by not_here.5.species8350

noob question - resistance through a device + LED

OK - so now Im wondering: +9V ----> positive lead ---> device ----> negative lead ----> ground seems ok.. yes? what if...
9 comments posted 22yrs
posted by anonymous
9 comments posted 22yrs posted by anonymous

3phase PWM variable speed motor

X-No-Archive: Yes I took apart a DVD-ROM drive for the heck of it and the control LSI is amazing stuff. The driver chip...
2 comments posted 22yrs
posted by dude17
2 comments posted 22yrs posted by dude17