Film marker (CB8347E)

Used with old projector films, this circuit found in Signalite documentation from the 1980s, records digital information on 35 mm films.

| Clique na imagem para ampliar |

LEDs in 110 V and 220 V (CB12804E)
The circuit shown has the advantage over the reductions with resistors to have a much higher...
Digital Motor Control (CB25629E)
This circuit uses a switch to select the direction of rotation of a DC motor. It was found in the...
Base triggered multivibrator (CB21471E)
Found in American documentation, this circuit can make use of modern equivalent transistors. The...