Hobby Electronics Basics

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Police Lightbar Project

My friend acquired a police lightbar from an old police cruiser, and we thought it might be fun to use it with our band...
3 comments posted 21yrs
posted by jjbutera
3 comments posted 21yrs posted by jjbutera

Controlling 12V from 5V

Hi, Newbie question...... I have a device I'm trying to turn on/off that requires 12V. I want to control it with a micr...
13 comments posted 21yrs
posted by nullset.spamtrap
13 comments posted 21yrs posted by nullset.spamtrap

Amplifiers

Hi to all , I want to know about the different BJT/FETamplifier configurations about their working and which component i...
5 comments posted 21yrs
posted by sandeepalankar
5 comments posted 21yrs posted by sandeepalankar

Still looking for joystick

--Have been all over the place, but can't seem to lay my hands on an old centering joystick, analog variety with pots o...
4 comments posted 21yrs
posted by steamer
4 comments posted 21yrs posted by steamer

Looking for bias meter

Hey all; A little while back, I was checking out different bias meters (for biasing tubes) on the internet and came acro...
5 comments posted 21yrs
posted by toccata
5 comments posted 21yrs posted by toccata

Rectenna

Hello, I'm trying to demonstrate the effects of Wireless Power Transmission (WPT), but, I must be doing something wrong...
7 comments posted 21yrs
posted by ed
7 comments posted 21yrs posted by ed

wiper nozzle wiring?

Hi, I bought lighted wiper nozzles for my car. Do I have to cut the head light wires or is there another way to not cut...
5 comments posted 21yrs
posted by JoshTmp
5 comments posted 21yrs posted by JoshTmp

ABOUT Amplifiers

Hi to all , I want to know about the different BJT/FETamplifier configurations about their working and which component i...
6 comments posted 21yrs
posted by sandeepalankar
6 comments posted 21yrs posted by sandeepalankar

Simple Microphone for Memorex Digital IC Recorder?

I have a pocket IC recorder (I have no idea what IC means) that uses memory rather than tape. It fits in my shirt pocke...
0 comments posted 21yrs
posted by wolf_tracks
0 comments posted 21yrs posted by wolf_tracks

DLP/LCD Projectors

Any good sources on the latest on computer projectors? PC Magazine? Popular Science? Consumer Reports? I'm looking for...
0 comments posted 21yrs
posted by wolf_tracks
0 comments posted 21yrs posted by wolf_tracks

Wire for high voltage pulse

Can I use some RG-58/9 coax as a conductor for a fencer? The unit pulses about once per second at about 2500 volts. I n...
10 comments posted 21yrs
posted by rharshbarger
10 comments posted 21yrs posted by rharshbarger

Difficult battery charger task

Dear All, I have been given a task to design a battery charger for SAFT batteries in series. There are 170 batteries in...
35 comments posted 21yrs
posted by boothmultipler
35 comments posted 21yrs posted by boothmultipler

phase lock loop (PLL) HELP

HI i need help for design the phase lock loop . i feel trouble in loop filter design. so please guid me Thanks R.Birasan...
2 comments posted 21yrs
posted by rbiras
2 comments posted 21yrs posted by rbiras

Cell site question

Hi everyone!! I'm courios about some cell site towers where net-like flat sheets can be seen to the sides of some anten...
0 comments posted 21yrs
posted by webcar2001
0 comments posted 21yrs posted by webcar2001

AVOmeter compared to cheap modern digital meter

How do bargain basement modern digital meters perform compared to the old analogue meters from 30 years ago like the AV...
8 comments posted 21yrs
posted by zak
8 comments posted 21yrs posted by zak