This circuit shows that we can implement a voltage-controlled oscillator with almost any CMOS that can be connected as an inverter. The circuit is from Radio Electronics from January 1987.
This circuit was obtained in Motorola documentation from 1969. The transistors are from the time...
The receiver circuit LM567 recognizes the tone set on 555. The connection between the circuits can be made...
This is a bridge for the measurement of low value resistances and high values too. The circuit...