Phase detector (CB8155E)

This circuit was found in a 1967 Electronic Design. The FET is from that time. Capacitor C is determined by the frequency of the signal worked.

| Clique na imagem para ampliar |

Even and odd counter (CB23780E)
This interesting digital counter with relays with complementary outputs was found in the Radio...
Socket control (CB24880E)
The idea of this circuit is that when the device in SO1 is turned on, the device connected to...
Battery Expander (CB12755E)
This interesting circuit allows to obtain symmetrical voltages from a simple battery. Among its...