We found this circuit in an 80s Intersil documentation. Modern equivalent operating systems can be used. The potentiometer adjusts the detection level.
This unity gain circuit was found in the February 1995 Electronics Now magazine. The frequency is 10 kHz,...
This circuit has a logarithmic response sourcing signals to na analog meter. The meter is a 200 µA or...
September 2017 - SparkFun offers through Mouser Electronics its protboard solderless board that...