https://forum.allaboutcircuits.com/threads/scr-ujt-dc-motor-speed-motorola-app-note.148001/
Thread Starter AnalogKid Joined Aug 1, 2013 11,056 Apr 21, 2018 #1 https://forum.allaboutcircuits.com/threads/scr-ujt-dc-motor-speed-motorola-app-note.148001/