Found in Motorola's 1968 documentation, this control appears elsewhere in this section. The bridge diodes must have current and voltage according to the motor used as load.
This simple transistorized receiver with earphone was found in a Japanese publication from the...
This circuit was found in Mullard's transistor application manual from 1960. The circuit can be...
This simple general-purpose transistor mixer was taken from an article in Electronics Now magazine in...