Hobby Electronics Basics

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digital fundamental

hi guys,i want you to help me to find a website for books on digital fundamental.in special case it should be by(thomas...
1 comments posted 20yrs
posted by mohamed.bukhari
1 comments posted 20yrs posted by mohamed.bukhari

analog multiplier

Can you make an analog multiplier with an operational amplifier or a biased transistor? Thanks.
7 comments posted 20yrs
posted by bob
7 comments posted 20yrs posted by bob

building a 220 voltage source

hi guys, i wanted to know where I could go to find a schematic or instructions on building a 220V power supply. I have...
8 comments posted 20yrs
posted by itpurt
8 comments posted 20yrs posted by itpurt

How to make an IR receiver circuit

Hi, i want help in building an IR receiver circuit that can receive signals from 20-25 feet of an IR transmitter. Pleas...
2 comments posted 20yrs
posted by amd.zfr
2 comments posted 20yrs posted by amd.zfr

op amp controlling a mosfet

Imagine you have a vehicle that receives up to ten amps from a generator, and with the generator off you need a blockin...
16 comments posted 20yrs
posted by kellrobinson
16 comments posted 20yrs posted by kellrobinson

Freq response of SB Audigy

I have an SB Audigy 2 card and I was going to use it for a quick freq response tester of a passive audio component that...
3 comments posted 20yrs
posted by Abstract.Dissonance
3 comments posted 20yrs posted by Abstract.Dissonance

Are there any fast simulation tools?

I am using MATLAB to do some simulation work on MIMO-OFDM. But to get simulation results from my computer, I almost hav...
2 comments posted 20yrs
posted by ddznq
2 comments posted 20yrs posted by ddznq

car charger for pda

hi. i have a "home" charger that outputs 1A 5V mini usb for my pda (it camed with the pda) Now i need to charge it in t...
2 comments posted 20yrs
posted by DantePT
2 comments posted 20yrs posted by DantePT

How to make a simple radio controlled car

i am interested in building radio controlled cars/devices Pls help me find websites/books that will help me find receive...
3 comments posted 20yrs
posted by amyth_813
3 comments posted 20yrs posted by amyth_813

power supply 2

HI, I am working on a power supply. The transformer is getting hot after 30 minutes of use. I can touch it , but not mo...
39 comments posted 20yrs
posted by lera
39 comments posted 20yrs posted by lera

Suface Mount Prototyping

Hi Everyone, I purchased the following Honeywell chipset: http://www.ssec.honeywell.com/magnetic/datasheets/hmc1055.pdf...
6 comments posted 20yrs
posted by dratim
6 comments posted 20yrs posted by dratim

Capacitor identification 2

http://www.hucker.plus.com/temp/cap2.jpg Removed from a broken (caught fire!) fanless power supply (fanless PC po= wer...
11 comments posted 20yrs
posted by no
11 comments posted 20yrs posted by no

Audio amplifier circuit does not work as expected

Someone that already have armed and made work the audio amplifier circuit of the book Getting Started in Electronics by...
9 comments posted 20yrs
posted by mariosalinas2005
9 comments posted 20yrs posted by mariosalinas2005

telephone cable wiring

Is all telephone cable wiring of the stranded variety? I would like to get some and splice into it to, but I would prefe...
3 comments posted 20yrs
posted by mike7411
3 comments posted 20yrs posted by mike7411

AC socket/wiring questions

1. Is the Hot wire more insulated than the neutral? If so, why? If the current is the same at all points in a circuit,...
18 comments posted 20yrs
posted by helluvanengineer
18 comments posted 20yrs posted by helluvanengineer