This circuit is part of an oscilloscope project with the PC. Its purpose is to record a peak in a signal that is to be displayed. We found it in the Radio Electronics magazine of February 1990.
This capacitor for small capacitances is based on the tuning of a receiver circuit. The variable is...
This 1995 documentation circuit detects when an extension on a phone line is active. Adjustment of the...
This analog tachometer can be used in cars with platinum or in robotic and automation applications to...