Using 5 V relays, this circuit can be used as a control shield for microcontrollers. The circuit uses relays, and the motor voltage is independent of the control voltage.
The circuit shown is from National Semiconductor, having been found in the 1994 Linear Application...
We found this circuit in a 70s American documentation. The integrated circuits are from that time....
This circuit is from a 1978 French magazine Electronique Pratique. The magazine no longer exists, but...