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How to make an LED light regardless of polarity?

Please excuse the newbie question: How can I make an ordinary LED light up regardless of the VDC polarity? I can imagin...
21 comments posted 22yrs
posted by joe
21 comments posted 22yrs posted by joe

PSpice SCHEMATICS Users Take Note!

PSpice SCHEMATICS Users Take Note! SCHEMATICS continues to be supported in the next PSpice release. Further support dep...
53 comments posted 22yrs
posted by thegreatone
53 comments posted 22yrs posted by thegreatone

Problems with a serial device

Hi all, I have a device that works linked to the serial port of a PC. Throw this serial port some commands are sent to...
3 comments posted 22yrs
posted by saident
3 comments posted 22yrs posted by saident

Power brick different outputs

I have a laptop that needs a power brick at 11V 4.5A that I cannot get hold of. In desparation, I tried a different pow...
1 comments posted 22yrs
posted by nadsinoz
1 comments posted 22yrs posted by nadsinoz

I need a 'hand crank charger' schematic or example.

Hi, I'm looking at making my own hand crank charger. I do know that I can find "hand crank chargers", by doing that sea...
1 comments posted 22yrs
posted by spamproofemail
1 comments posted 22yrs posted by spamproofemail

changing my VMeter from 0.25A to 25A

hi I have a volt meter which can reads DC current up to 0.250A How do I make it able to read up to 25A maybe just adding...
4 comments posted 22yrs
posted by abcd
4 comments posted 22yrs posted by abcd

Help with 6845 CRTC needed

I am building a video circuit to use with a z80-based project. I am looking to use a 6845 to give a screen resolution o...
5 comments posted 22yrs
posted by google
5 comments posted 22yrs posted by google

1999 Pontiac Bonneville Power Mirrors

Anyone have a 1999 Pontiac Bonneville schematic? I'd really appreciate a pinout (wiring color, connector letters, and f...
5 comments posted 22yrs
posted by webpa
5 comments posted 22yrs posted by webpa

Plug Wiring Reversed?

I just bought a house and the inspector tagged four of six basement outlets as hot/neutral reversed. I open the first t...
38 comments posted 22yrs
posted by nielloeb
38 comments posted 22yrs posted by nielloeb

coils

Hello, I would to know how to make coils. I want to make a small motor, but I need to make coils. Basically what gauge...
6 comments posted 22yrs
posted by lera
6 comments posted 22yrs posted by lera

fuse ?

Need to replace the fuse in the AC adapter for a friends external computer speakers, and can't make out the rating of t...
1 comments posted 22yrs
posted by db5151
1 comments posted 22yrs posted by db5151

BFM, Maybe Gen.

I scrounged this big F'ing motor out of the trash bin, looks like it was a drive motor for a big copier or old mainfram...
13 comments posted 22yrs
posted by veryfree123
13 comments posted 22yrs posted by veryfree123

IEEE ICM'2004 last Call For Papers

IEEE ICM'2004 last Call For Papers 12 SEPTEMBER, 2004 SUBMISSION DEADLINE for Extended summaries On-line submission at...
0 comments posted 22yrs
posted by Kholdoun.Torki
0 comments posted 22yrs posted by Kholdoun.Torki

New Fry's.. WOW!

=46Inally, Fry's Electronics opens a store on the east coast, in the Atlanta area, right on my commute route!.. =20 Ama...
4 comments posted 22yrs
posted by dwarner22
4 comments posted 22yrs posted by dwarner22