Universal speed control (CB20783E)

This control, which may appear in other versions on this site, was found in documentation from the 1970s. SUS is an uncommon component today.

| Clique na imagem para ampliar |

Light Activated Switch (CB3971E)
We find this circuit in a 1970 publication. Transistors can be replaced by current equivalents and LDR is...
Common collector stage (CB9062E)
Featuring low output impedance and high input impedance, this configuration was found in a 1980s...
Alarm with lock (CB8964E)
Found in a 1980s American documentation, this circuit can use a SCR and a general-purpose transistor....