This passive loudness control was obtained in an old publication. The critical component is the tapped potentiometer that can be adapted with an external resistor network.
The traditional circuit was taken from a French magazine Radio Plans that no longer exists but can...
This astable TTL with the 7400 integrated circuit appears elsewhere in this section. This version is...
June 2016 - It can be obtained from Mouser Electronics this new chip for motor control, motion,...