Synchronized switch (CB8253E)

Synchronized key. This circuit was found in a 1966 General Electric documentation. Modern equivalent components can be used.

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Overload protection (CB24883E)
This circuit is a continuation of the previous one, serving as a protector against overloads in...
One Transistor High Power Switch (CB990E)
This circuit can handle 25 A unde a 32 V voltage using a hight power old transistor. This...
500 mW amplifier using the 741 (CB6991E)
This circuit was found in 80's Popular Electronics. Transistors are commonly used. The...