General Electronics

A couple LED questions

1. Can a multi-colored LED (like the one here - http://www.elexp.com/opt_rgbc.htm) change colors 30 times per second? 2...

12 comments posted 17yrs

posted by mousepoop.com

12 comments posted 17yrs posted by mousepoop.com

take a break from work and play a cool flash game

take a break from work and play a cool flash game http://yaofan5.mybrute.com

0 comments posted 17yrs

posted by yaofanfanyao

0 comments posted 17yrs posted by yaofanfanyao

Film scanner service v.s. film and slide sanner puchase

Does anybody know if there is any place that provides the service to convert the film into digital pictures? I was also...

4 comments posted 17yrs

posted by min.zhu

4 comments posted 17yrs posted by min.zhu

Potential Energy

When we go upstairs we spend a lot of energy that gets stored as potential energy. When we go downstairs we waste all t...

16 comments posted 17yrs

posted by karwa-karela

16 comments posted 17yrs posted by karwa-karela

RF signal bypass from power

Hi.. I have an old observation camera Philips VCM8160. From some readings I presume the signal comes in RF mode.. not v...

2 comments posted 17yrs

posted by davide.palma

2 comments posted 17yrs posted by davide.palma

Looking to block / jam VHF frequencies.

Cross-posted to sci.electronics.repair / misc, as I didn't know which one would be most appropriate. Anyone know of a R...

27 comments posted 17yrs

posted by borat_deletethis_

27 comments posted 17yrs posted by borat_deletethis_

ABCD parameters

I am attempting to understand the computation of various interesting quantities (eg, insertion loss as a function of fr...

2 comments posted 17yrs

posted by rjtucke

2 comments posted 17yrs posted by rjtucke

Headsets

Do you talk on the phone for long hours? If yes, then buy headsets and perform your day to day activities while conversi...

1 comments posted 17yrs

posted by Dennis.Jaylon

1 comments posted 17yrs posted by Dennis.Jaylon

Simple digital pulse delay,..

I'm looking for a way to introduce a small amount of dead time into an H-bridge. Switching frequency is up to 250kHz, s...

20 comments posted 17yrs

posted by nick

20 comments posted 17yrs posted by nick

LED based Wireless Networking

I would be intersted to get information about LED based Wireless Networking. R M Patnaik, PhD.

2 comments posted 17yrs

posted by rmpatnaik

2 comments posted 17yrs posted by rmpatnaik

Free Filter Software Just Ask and You Shall Receive

Hello All Good Technical Folks; For you Electronic hobbyist. I have compiled software which should run on Win Xp or Vis...

0 comments posted 17yrs

posted by gmvoeth

0 comments posted 17yrs posted by gmvoeth

Products for electronic assembly and Repair

www.hmcelectronics.com

0 comments posted 17yrs

posted by amycbiron

0 comments posted 17yrs posted by amycbiron

Speaker impedance

I have an old Chevy Cavalier convertible with the factory AM/FM cassette player in it. The rear 6X9 speakers are missin...

1 comments posted 17yrs

posted by jamiegoforth

1 comments posted 17yrs posted by jamiegoforth

LM317 with pass transistor

Hi, I'm looking at a circuit in the TI datasheet for the LM317 voltage regulator. Fig 14 on page 12 shows a circuit wit...

2 comments posted 17yrs

posted by chris

2 comments posted 17yrs posted by chris

Difference between an optocoupler and a SSR

Does anybody know the difference between an optocoupler and a Solid State Relay? Thank you very much! Kind Regards, Mat=...

4 comments posted 17yrs

posted by mabattis

4 comments posted 17yrs posted by mabattis