This circuit is from a 1972 Motorola publication. The used transistor can still be found, but it can be used equivalent. The circuit is powered by the amplifier with which it must operate.
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,...