Steam locomotive (T315E)

This 1967 modeling circuit mimics the whistle of a locomotive. The steam-shrieking wheezing is set in a 2k2 potentiometer.

| Haga click en la imagen para ampliar |

Oscillator with SCR (CB22094E)
This SCR relaxation oscillator was found in old documentation. The SCR can be TIC106 and the...
Decibel Meter (CB24299E)
Found in the March 1974 Radio Electronics magazine, this circuit is designed to measure the level...
Assisted Ignition (CB6379E)
This circuit was found in Motorola's 1967 documentation. The circuit makes use of power...