Astable 555 (CB21101E)

This 50% duty cycle configuration was found in a Popular Electronics from the 1990s. The operating frequency is given by C1.

Q Variator (CB7369E)
With this circuit found in an American documentation from 1969 it is possible to vary the...
Digital Voltage Reference (CB24682E)
The reference voltage for this circuit can be selected digitally. The circuit is from Radio...
860 W Precision Dimmer (CB20712E)
This circuit was found in an old factory documentation. The circuit uses single-junction...