Hobby Electronics Basics

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Button Pusher for Time-Lapse Photography

Button Pusher for Time-Lapse Photography ---------------------------------------- This article is being cross-posted in...
2 comments posted 19yrs
posted by gh424NO824SPAM
2 comments posted 19yrs posted by gh424NO824SPAM

How to detect wave crest accurately?

A normal waveform is converted to digital signal by A/D converter. And we use a microprocessor to detect the ware crest...
5 comments posted 19yrs
posted by Xieyu1219
5 comments posted 19yrs posted by Xieyu1219

Rechargeable battery

I purchased a new Dewalt cordless drill 18 volts it came with two batteries that I will not need for awhile maybe a yea...
1 comments posted 19yrs
posted by rickj
1 comments posted 19yrs posted by rickj

12 Volt DC Battery as Power Source for Camping

I'm a total newbie to amps, volts, wattage. I'm going on a camping trip into the desert for 2 weeks, so I've purchased...
32 comments posted 19yrs
posted by beth.stover
32 comments posted 19yrs posted by beth.stover

Need circuit for antenna up from Sirius radio

I need a circuit that knows when the power is on at my Sirius Stratus radio to tell the antenna to go or stay up. Probl...
0 comments posted 19yrs
posted by gpbeck
0 comments posted 19yrs posted by gpbeck

Chameleon for Optoelectronics

Optical semiconductors made of magnetic particles change their color depending on magnetic field strength http://theanal...
0 comments posted 19yrs
posted by diyakimble
0 comments posted 19yrs posted by diyakimble

Simple comparator with delay?

Hi all! I have this: http://bayimg.com/fADbOAABN The image shows the input and output voltages given certain conditions...
6 comments posted 19yrs
posted by mr.whatever
6 comments posted 19yrs posted by mr.whatever

Voltage regulator puzzle - any ideas?

Hi, I built this PSU circuit: http://modular.fonik.de/soundlab/sl_psu.pdf All is well, except I'm getting -21v from the...
17 comments posted 19yrs
posted by downlode
17 comments posted 19yrs posted by downlode

M-Bus

hi all i'm searching for a M-BUS sniffer? M-Bus is a special bus where the master will send a voltage (idle state typic...
2 comments posted 19yrs
posted by pedast
2 comments posted 19yrs posted by pedast

How do i build a FM Reciever?

Hi Any body know how to build a Fm Reciever? Thanx
6 comments posted 19yrs
posted by connectme.deepak
6 comments posted 19yrs posted by connectme.deepak

Voltage Trigger

Hi everyone, I am trying to build a circuit that will trigger an SCR when a capacitor is charged to, or above, 800 volt...
4 comments posted 19yrs
posted by mysweeps123
4 comments posted 19yrs posted by mysweeps123

Remote controlled laser pointer?

I'd like to have this for a magic trick: A laser pointer rigged to go on and off by remote control. Is there a remote-co...
6 comments posted 19yrs
posted by Mitch
6 comments posted 19yrs posted by Mitch

FM Transmitter with more power

Hi, Is there a way to build a FM Transmitter that have more power than the current ones you find in kits around the net?...
6 comments posted 19yrs
posted by jg0268
6 comments posted 19yrs posted by jg0268