Thunderchild said:
I need to make a voltage controlled amplifier to put in a theremin. unfortunately the IC specified in the diagram is impossible for me to getso i must find another IC or make a VCA with an op amp. can anybody help me in this. i was also woundering: the theremin will probably have a log or exponential reaction so could this be neutralised with an op amp in expo or log configuration ? :roll:
My friend, i want you to explain the principle with more clarify, could you please do that?!
for example , what is VCA?!
thanks!