Hobby Electronics Basics

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More on dual pulse generator

(See thread " Special "dual" pulse generator circuit " and "Porblems with NTE3083(4N32)" for recent discussion on this...
27 comments posted 21yrs
posted by Jag_Man653R-E-MOVE
27 comments posted 21yrs posted by Jag_Man653R-E-MOVE

Memory stick ID

I have two memories sticks and don't know what speed they. They came out of a old PC runnfor the first one: 28092101 10...
5 comments posted 21yrs
posted by ronakshaw
5 comments posted 21yrs posted by ronakshaw

Static electricity equivalent generator

Is it possible to build a circuit for generating high voltage at very low current equivalent to that of a simple electr...
2 comments posted 21yrs
posted by movsw
2 comments posted 21yrs posted by movsw

pabx caller id bypass

hello I was wondering if anybody knows how to bypass a PABX for caller-ID information, so the internally connected hand...
3 comments posted 21yrs
posted by peter273
3 comments posted 21yrs posted by peter273

Positive or negative tip: how to tell?

I have an old Sanyo cassette recorder, model M 1540A. Can find no information on what polarity of tip it uses. Only kno...
9 comments posted 21yrs
posted by questions
9 comments posted 21yrs posted by questions

DC motor

First, let me say hello to everyone as I am new to the group. My question is how can I wire a DC motor to be reversible...
55 comments posted 21yrs
posted by webmaster
55 comments posted 21yrs posted by webmaster

oscilloscope recommendations

Hello, I posted a message a while back on recommendations for an oscilloscope. This would be my first one primarily use...
2 comments posted 21yrs
posted by no_spam
2 comments posted 21yrs posted by no_spam

why aren't electronics schematics trade secrets?

Just curious why electronics schematics aren't closely guarded trade secrets. Is it because the hard part is making the...
10 comments posted 21yrs
posted by jidanni
10 comments posted 21yrs posted by jidanni

press to see time wristwatch saves battery?

How much longer would the battery of a digital wristwatch last if one had to press a button to view the time? (Otherwise...
8 comments posted 21yrs
posted by jidanni
8 comments posted 21yrs posted by jidanni

alternator circuit

I have an old BMW motorbike retrofitted with an a 12V alternator, I would to find a circuit for an 'idiot light', so th...
1 comments posted 21yrs
posted by pgw1
1 comments posted 21yrs posted by pgw1

Running electric blanket on DC?

Greetings All, I know this is silly but here it goes: My wife and I keep our bedroom un-heated so it gets cold in the w...
12 comments posted 21yrs
posted by etpm
12 comments posted 21yrs posted by etpm

PIC resets when powering fluorescent lights

Need some advice on powering a bank of fluorescent lights. My controller uses a PIC 16F876 to a 2803 Darlington array t...
11 comments posted 21yrs
posted by Richard
11 comments posted 21yrs posted by Richard

Is this jack wired correctly?

Please see J4 for a TenTec RX-320HF receiver -- copied from the TenTec web site: http://home.att.net/~cprstn54/J4.JPG A...
4 comments posted 21yrs
posted by cprstn54zz
4 comments posted 21yrs posted by cprstn54zz