This circuit is from Dutch documentation from 1967. The circuit works with a component of the time, the BRY39, which is uncommon today.
This circuit was found in the PC documentation from 1996. The maximum current of the motor is...
This modern XTAL radio replaces the galena crystal for a germanium diode as the 1N34 or...
We found this circuit in a 1967 documentation. The circuit can be designed based on current...