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 control for 12 V drills was found in a 90s Elektor. The components are current, and Q1 can be...
Found in an old English publication, this circuit applies to the 240 V network, but can be changed to...
This circuit was found in a 90s Popular Electronics. With it, using a 4066, it is possible to...