Telephone amplifier (CB8630E)

This circuit uses a pickup coil to take the signal from a telephone line without contacts. The circuit is from a 90s Popular Electronics.

| Clique na imagem para ampliar |

Laser trigger (CB7225E)
Found in an American publication in 1967, this circuit generates pulses for the triggering of a LASER of...
Adjustable Current Limiter LM317 (CB15314E)
The maximum current of this circuit is 1.5 A. The circuit has the formulas next to the diagram to...
Biestable Sound Switch (CB5991E)
This biestable vox circuit was found in an old documentation. The circuit makes use of components of...