We found this circuit in an American publication from the 90s. It generates pulses that can be modulated in amplitude. The supply can be done by voltages from 5 to 12 V and the frequency depends on C1 and C2.
This timer has a divider programmed by BCD switches. The circuit is from a Radio Electronics...
Using a mechanical drive motor, this circuit was found in old documentation. The engine turned off the...
When the input voltage exceeds the value set in R4, the LED lights up, indicating this. The...