Arduino-Based Universal AC Motor Speed Controller

Thread Starter


Joined Apr 20, 2019
Hello everyone, i am trying to replicate a project from here but with no success, if i spin the motor with hand the real rpm on the lcd changes, so tacho works, i can hear the relay click, so that works, i scoped the output of the zero cross circuit, that works, but i still have nothing on the output that goes to the triac. What could i be doing wrong ? I am also attaching a print screen of my pcb design
ac m.jpg