Hi everyone. IM SORRY FOR MY BAD ENGLISH I HOPE YOU WILL UNDERSTAND ME Im working to build a sawdust burner for home central heating. I need to control speed of air supllying fan with PWM signal that comes from PLC output. i need help to build driver for fan motor, shematics, circuits, instructions anything. PWM signal : 24V 500Hz duty cycle from 30% to 100% Motor: 12V DC 10A brushead motor If possible, i want to isolate PLC output with optocoupler.