555 Code Oscillator (CB26324E)

Found in a 1990s Popular Electronics, this circuit produces a tone on a small speaker. The keyer directly controls the power supply.

| Clique na imagem para ampliar |

Pulse Width Multiplier (CB6349E)
This circuit is intended to increase the width of a pulse. The circuit is TTL and can be used as a...
Flasher with Transistors (CB5210E)
We found this circuit in an American 1980s documentation. The transistors can be equivalent as BC548...
Single Phase AC Motor Driver (CB7151E)
This circuit was found in Sprague Electric documentation from the 90s. The circuit uses a...