|Firmware for the Refined Full-Wave Motor Speed Controller [1010221A.HEX]|
Firmware for the Refined Full-Wave Universal Motor Speed Controller (1010221A.HEX).
The alternative version, 1010221B.HEX, works identically except that when power is applied, it won't start the motor if the speed pot is not at zero. You need to rotate the speed pot to zero and then back up to start the motor. This safety feature could be useful in some situations.