help design of round counter

Thread Starter

medridha

Joined Mar 2, 2010
6
i need circuit to build a round counter using optical diode and transistor and convert this signal in value in round per minute
 

beenthere

Joined Apr 20, 2004
15,819
There are several examples in the data sheet. Take the signal off the optotransistor, between the collector and the resistor to the voltage source.
 
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