Found in an American documentation from the 90s, this circuit uses small low voltage lamps (6 to 12 V0. The circuit can be adapted to use LED indicators.
We found this relaxation oscillator in a 1967 General Electric documentation. The frequency is given...
This circuit generates a 20 MHz sinusoidal signal from a 10 MHz crystal. It is found in the 1992...
This circuit is from a 1967 publication. The potentiometer above 4M7 is the critical component. The...