Integrated control circuit of the LM324 opamp circuits are working with 12-24 volt motor direction (the direction B) and speed control (24volt 10Amp are) able to. Working frequency of 270Hz and printed circuit materials list. Motor Speed Control Circuit... Electronics Projects, BI-Direction Motor Speed Control Circuit LM324 Mosfet IRF9540 IRF540 "motor control circuit, motor driver circuit, " Date 2019/08/02