Hobby Electronics Basics

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Basics of electronics / PCs

HI, Is there a good site / book / projects that explain what happens when we send some information from the keyboard to...
0 comments posted 21yrs
posted by geekscosmos
0 comments posted 21yrs posted by geekscosmos

DC to AC

Hello I bought very old used overhead mobile video. I intend to use inside the house with AC and mobile video has 12V w...
2 comments posted 21yrs
posted by barbecuesauce99
2 comments posted 21yrs posted by barbecuesauce99

Black epoxy covering ICs?

I've often noticed on some circuit boards that there is a type of black epoxy that seems to be covering ICs. Is this bl...
4 comments posted 21yrs
posted by none225
4 comments posted 21yrs posted by none225

Explanation of Amps

I am trying to learn more about electronic, but for some reason I cannot fully Amps with the examples the book provided...
19 comments posted 21yrs
posted by tuxtlequino
19 comments posted 21yrs posted by tuxtlequino

TV Flyback: finding HV return

I am after high voltage (for photomultiplier tubes) and considering use of TV flyback transformers. I have a couple, in...
2 comments posted 21yrs
posted by dlwebb
2 comments posted 21yrs posted by dlwebb

LCD controlling with comparators

Hi all, I've (half-)built a "clock" using a cheap LCD display and a couple of PICs. Currently, it's very OTT with pics,...
36 comments posted 21yrs
posted by danny
36 comments posted 21yrs posted by danny

Green PCB's

How do manufactured PCB's get there green colour and what purpose does it surve. Thanks.
3 comments posted 21yrs
posted by richard_harris_2
3 comments posted 21yrs posted by richard_harris_2

Current meter circuit

Does anyone have a simple circuit for a digital ammeter? I have a car project that I want to monitor how much current t...
2 comments posted 21yrs
posted by danritter
2 comments posted 21yrs posted by danritter

PC keyboard to IC

Hi all, I've heard there is an IC which can convert an IBM PC keyboard to ASCII. Any help is very appreciated. Thank you...
7 comments posted 21yrs
posted by padmow_69
7 comments posted 21yrs posted by padmow_69

charge an american device in Europe

Hi, I live in Europe where the electricity is 240V and 50HZ I just bought a (WAHL) hair trimmer from the USA. The batte...
34 comments posted 21yrs
posted by andreas.manoli
34 comments posted 21yrs posted by andreas.manoli

How to make USB ports more zap resistant?

Several months ago, a port on an NEC-based USB card failed (a section of its LM3526 power controller & overcurrent prot...
31 comments posted 21yrs
posted by larrymoencurly
31 comments posted 21yrs posted by larrymoencurly

Need help with op-amp/comparator circuit

Hello all, Danny got me thinking about my op-amp stuff, so I resurrected it for another application/experiment. Now wha...
16 comments posted 21yrs
posted by spam
16 comments posted 21yrs posted by spam

tmer relay help needed

I have a project that needs a timer relay to run a device ON for a few seconds (30ish?) evey few minutes. i purchased t...
12 comments posted 21yrs
posted by urjant
12 comments posted 21yrs posted by urjant

Soldering Snot

Hi, do your pcb's look like some one has sneezed solder all over it when your finished soldering it? Is this normal I d...
16 comments posted 21yrs
posted by richard
16 comments posted 21yrs posted by richard