Any sensor or piezo capsule can be used as a sensor in this circuit. The integrated circuit is also common in our days and a table of sensor voltage levels.
This circuit is from a 90s Popular Electronics. The circuit employs a ZN461E that is not a common...
June 2017 - A wide variety of Rohm Semiconductor audio and codecs for audio is available from...
This circuit switched with the help of small inductors produces a peak voltage above 20 V that is...