This circuit is from an American documentation from the 90's. The SCR can be of any type and the diodes must have current according to the controlled motor.
The circuit shown is from Motorola's Linear Interface ICs from 1992. The circuit uses a...
This circuit is based on an MC1408, an integrated circuit that is not common today. The...
This simple timer or timer activates a low current bell or a buzzer according to the supply...