Hobby Electronics Basics

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recycle cell phone as garage door opener

I hope some genius on this usenet group can give me some clues in recycling a cell phone. I spent over a $100 for it ab...
6 comments posted 19yrs
posted by SierraBrother
6 comments posted 19yrs posted by SierraBrother

Not sure about PIC ICSP Spec

I'm having a hard time figuring out what this spec means http://www.semiconductorstore.com/pdf/newsite/microchip/PIC24F...
1 comments posted 19yrs
posted by Jon_Slaughter
1 comments posted 19yrs posted by Jon_Slaughter

tv remote w channel/timer functions?

At one point in time several yrs back, there was a tv remote that also had a channel /timer function that allowed the r...
5 comments posted 19yrs
posted by patm31751
5 comments posted 19yrs posted by patm31751

Inverted Pins

When I see an inverted pin in a timing diagram do I need to invert it or what? Basically I'm looking at a pic that has...
13 comments posted 19yrs
posted by Jon_Slaughter
13 comments posted 19yrs posted by Jon_Slaughter

log with JFFS2

Hi, I want to log a file in a JFFS2 filesystem. I have a NOR Flash of 128Kb sectors and a typical 100000 erase cycles by...
0 comments posted 19yrs
posted by none
0 comments posted 19yrs posted by none

balanced photodiode

My professor gave me a circuit schematics of Balanced photodiode. This is my first time to study Balanced photodiode. I...
1 comments posted 19yrs
posted by sperelat
1 comments posted 19yrs posted by sperelat

civil

Why plywood is not used in boats?
11 comments posted 19yrs
posted by thiaga.1989
11 comments posted 19yrs posted by thiaga.1989

troubleshooting steps

This is a wide open question and I expect I'll get alot of varying opinions, but here goes. What would you consider to b...
6 comments posted 19yrs
posted by tukester01
6 comments posted 19yrs posted by tukester01

eni filter

Normally its mentioned that common mode current flows through the saftey ground and returns along the line and neutral...
0 comments posted 19yrs
posted by krishmaniac
0 comments posted 19yrs posted by krishmaniac

Building an IR lightsource

I've modified a webcam to see into the infrared. And I know where to get IR LEDs. Now I have to build the light source...
11 comments posted 19yrs
posted by yan
11 comments posted 19yrs posted by yan

are modern IC minimum specs accurate/precise ?

i was re-checking the specs on the A618SEP replacement for my SN75518N .... advertised as drop in replacement and i not...
2 comments posted 19yrs
posted by some
2 comments posted 19yrs posted by some

What frwequency garage door opener transmitter?

Just acquired a Stanley Auto Trans Invisible garage door opener transmitter. On what RF frequency do these transmit? I...
7 comments posted 19yrs
posted by tsanford
7 comments posted 19yrs posted by tsanford

Flash controller for 12V brake/tail system

Hi all, I am trying to build a controller to flash an automotive LED brake/ tail light. The light has a 3-wire interfac...
8 comments posted 19yrs
posted by dbonnell
8 comments posted 19yrs posted by dbonnell

Help with normally closed relay on motion sensor

I have a motion sensor that has a normally closed relay. When motion is detected, the relay opens. There is no option f...
6 comments posted 19yrs
posted by drw41
6 comments posted 19yrs posted by drw41