Use Speaker wire to send signals.

[MITELMX]

I need to know if is possible to use the internal speaker connection to send a signal and turn on a lamp from there, this in order to implement some visual alarms on some PC´s. It is possible?

Thanks in advanced

 

[edfair]

Should be. It is a square wave 5 volt signal. A filament lamp rated 4.5 should try to glow with a beep signal. Or a bundle of leds properly protected would cycle on and off fast enough to give the appearance of being on.

Ed Fair
Give the wrong symptoms, get the wrong solutions.

 

[MITELMX]

Ok, and if i want to send this signal to a relay, it is enough to activate it or i need to amplify the signal.

Thanks

 

[edfair]

This is a speaker. The input signal is effectively AC at a frequency that is faster than a relay can handle and not powerful enough to seal a relay.
Best bet would be to use the signal to latch some sort of TTL device. and use that to operate the relay.

Ed Fair
Give the wrong symptoms, get the wrong solutions.