The speed indication of this circuit is made on an analog instrument. The circuit is used to count pulses (rpm) and was found in April 1976 Radio Electronics magazine.
This circuit was found in documentation from 1977. It consists of a bridge of capacitances using a 50...
This oscillator with the PLL 4046B was obtained from a 90s Radio Electronics. The circuit...
Using the NE5205 integrated circuit this circuit was found in the May 1987 issue of Radio...