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 circuit is used to test capacitors with a working voltage above 150 V, detecting shorts or...
The circuit shown is used to reset TTL logic when power is established. The circuit uses a 7413...
This circuit was obtained in a Motorola manual from the 70s. The integrated circuit is from that...