This circuit is from a 1967 General Electric SCR manual. The capacitors are polyester and the inductor must have current according to the controlled load.
This damped oscillator that mimics the sound of a gong was found in 90s American documentation. The...
PIC16F19197 Microcontroller Family Combines Battery-Friendly LCD Drive with Core Independent...
We find this circuit in a 1977 technical documentation. The circuit generates signals in a wide...