This circuit allows you to read capacitances on a common analog instrument. It is part of an article in the April 1990 Radio Electronics magazine.
This circuit produces the ticking of a clock on a common piezoelectric transducer. The circuit has an...
The basis of this circuit is a double T in the feedback, which has the components calculated to...
This configuration was found in the Texas Instruments optoelectronics manual. PNP transistors...