Optical potentiometer (CB22159E)

This voltage-controlled potentiometer using an LDR was found in an English documentation. LDR is common and LED of any type.

555 Delayed Pulse Generator (CB24440E)
This common 555 circuit was found in documentation from the 90s. The circuit uses two 555s and the...
Zero crossing detector (CB20624E)
This type of circuit, found in American documentation from the 1980s, triggers producing output...
1 kV Power Supply (CB13005E)
This circuit is nothing more than a voltage quadruplicator that can generate close to 1 000 V from...