I am looking for an USB (or serial) interface and program which will allow me to do the following.
I need to create a 3 volt pulse at a variable rate of between 50 and
400 pulses per second.I would like to vary the rate of pulse as CPU load (or something like that) changes.
Any help would be greatly appreciated. Matthew
I see two possibilities :
- Either you use a pin of the RS232 port that is under owtware control (DTR line or similar), and you toggle it directly with a PC-based software, using on of the timers of the PC to set the rate. Vert easy under DOS, a little trickier under Windows...
- Or you hook a small 8-pin micorocontroller on the serial or USB port and you program it to generate the good pulse rate, based on orders sent through the communication port. Easy with a serial port, a little more complex on USB...
Cheers, Robert Lacoste - ALCIOM : The mixed signals experts
"Matthew" a écrit dans le message de news: snipped-for-privacy@posting.google.com...
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