Audio Cable Tester (CB3827E)

This simple circuit tests both monophonic and other two-wire audio cables. The circuit is powered by two common batteries.

Temperature to frequency converter (CB5103E)
This circuit is from the owner's manual of the integrated circuits used. The manual is old, which...
Gun Sounds Generator (CB4626E)
The UM3562 integrated circuit is a dedicated circuit found in many toys because it generates three types...
Three Phase Motor Speed Inverter (CB4259E)
This circuit was found in the ON Semiconductor thyristor manual of the 1980s. As the drive is done by...