i want 2 run a small electric motor using my comp. i want 2 feed it electricity thru my comp. so wats d output voltage, current n power in my audio port. my controle pannel shows ' CMI Audio' . or is there ny other better way to feed electricity thru my comp. if so the how. details wld b highly appreciated. Thanks
2006-10-20 17:17:57 · 4 answers · asked by mohit khanna 2 in Computers & Internet ➔ Programming & Design
If you are looking for a way to control the motor from the computer, the printer port or serial port both have pins that can be driven under software control.
You would need some external circuity to isolate the motor from the PC, either a transistor and relay (with catch diode), H bridge driver or something similar would do.
If you are just looking for a source of power from the PC, then USB or the joystick port spring to mind.
Regards, Dan.
2006-10-22 10:39:35 · answer #1 · answered by Dan M 3 · 0⤊ 0⤋
USB would be a better choice and easier to program an output for controlling the motor, but at best both would be about 5 Volts Max. Since the audio output isn't amplified, and how would you get a constant voltage out of your audio port? A constant noise? With USB you could find programming info on the web.
2006-10-20 17:30:05 · answer #2 · answered by knujefp 4 · 0⤊ 0⤋
Any audio port carries close to no voltage whatsoever, certainly not enough to run a small electric motor. However, USB ports carry 6 and 12 volt currents. All you have to do is find a spare USB cord somewhere, slice it open, find the red and black (maybe red and green) wires and hook 'em up. One small warning, if you cross-wire these in any way, you may fry your USB port.
2006-10-20 17:38:48 · answer #3 · answered by fewofmany 3 · 0⤊ 0⤋
You need an I/O relay control board. The output of the PC controlled switch goes to a properly rated relay. The relay switches the motor on and off. Isolating the PC from the motor voltage,
2006-10-20 17:35:37 · answer #4 · answered by Uhookah2 3 · 0⤊ 0⤋