This motor speed control with tachometer sensor was found in the 1993 Radio Experimenter Special Projects. The maximum current is 2.4 A.
The presented circuit can be implemented with a BC548 and for larger currents a BD135 can be used....
This circuit works directly connected to the network and special care must be taken with its...
Suitable for dual applications, this timer was found in a 90s Popular Electronics. The circuit...