Two-component photorelay (CB22087E)

This circuit makes use of an ultrasensitive relay or reed-relay. LDR supports equivalent.

Colpitts Oscillator with MOSFET (CB8141E)
Found in an American documentation from 1969, this circuit operates at a frequency determined by the...
Negative ion generator (CB20683E)
This circuit was found in Radio Electronics from the 90s. The components used are common, and the...
Gun Sounds Generator (CB4626E)
The UM3562 integrated circuit is a dedicated circuit found in many toys because it generates three types...