[Laser] Optical pulse rate counter

Thu, 24 Apr 2003 10:56:02 EDT

In a message dated 4/24/03 11:06:24 AM GMT Daylight Time, 
[email protected] writes:

> I have made small device model PRC-10K that counts pulse rate of optical
> pulses 0-10kHz rate. data is direct RS232 output to your PC directly. It
> operates on a single small 9V battery. I can spare few for US$150 each to
> those want it.
> 
> 

Haven't I seen something like this for about $10 to which you would add an 
RS232 converter chip for another 5  ?

Sorry, it was "I can spare a few" that did it.

73

David

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