Found in a Philips publication from the 1970s, this circuit uses a DO040, which is difficult to obtain today. The circuit is powered by 12 V on pins indicated in the diagram.
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,...