Found in a 1967 publication by General Electric, this control is intended for motors up to 2 A according to the SCR used. Higher current equivalent SCRs can be used.
The circuit shown is from the National Semiconductor Linear Applications Handbook of 1994. using...
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...
Found in a 90s Popular Electronics, this circuit uses a 741 to generate frequencies from 0.1 to 30...