Infinite Impedance (CB6154E)

This circuit is from an American 1967 documentation and can be implemented with modern equivalent transistors. The circuit serves as a Q multiplier.

| Clique na imagem para ampliar |

Bicycle speedometer (CB7382E)
This circuit appears in other versions on this site. obtained from other publications. This is...
Neon inverter (CB6699E)
This simple circuit, suggested by 1969 documentation, has already been featured in other articles...
Scheduled Triggered Timer (CB4338E)
This circuit was found in a 1989 documentation and was intended to be part of a presence...