Video amplifier 1 (CB9417E)

Found in an Electronic Products from the 90s, this amplifier makes use of an operational amplifier of the time. The power source is symmetrical.

Simple photometer (CB20507E)
This 3-component circuit uses an analog indicator. We found it in an old publication....
Sequencer Using the 4013 (CB161E)
Pulses in sequence can be generated from a clock input using the circuit shown bellow. Outputs A,...
Simple Siren 555 (CB3862E)
This circuit simulates a low-level siren and can be supplied with voltages from 5 to 15 V....