AnsweredAssumed Answered

vrf 22KHz square wave

Question asked by VRFuser on Aug 13, 2002

You don't mention why you would want to use a RS232 COM port to
generate a 22KHz square wave.  It is the last way I would do it.  Some
1) Use a 555 timer set for 22KHz.
2) If exactly square is a requirement, use a 555 timer set for 44KHz
and a flip-flop to square the output.
3) If you need to control on/off of the pulse stream, use the com line
to "reset" the 555 timer or the flip-flop.
4) If some real logic is needed, use the com port to talk to a stamp
processor and have it generate the square wave.
5) If an exact number of pulses are needed, use a count down timer or
a stamp to create the pulse.

Just some ideas off the top of my head.

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