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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. Cat No SC5807. Price: Free Files: TRIAC motor controller PIC12F617 (1010221A-B).zip (ZIP contains .hex and .asm files; 15.0KB) Related to: Project: Refined Full-Wave Motor Speed Controller (April 2021 [print issue] [online issue]) Other items relevant to this project: Refined Full-Wave Motor Speed Controller PCB [10102211] ($7.50) Add to trolley PIC12F617-I/P programmed for the Refined Full-Wave Motor Speed Controller [1010221A.HEX or 1010221B.HEX] ($10.00) Add to trolley (with default options) Hard-to-get parts for the Refined Full-Wave Motor Speed Controller ($60.00) Add to trolley (with default options) Refined Full-Wave Motor Speed Controller PCB pattern (PDF download) [10102211] (Free) Add to trolley Cutting diagrams and lid panel artwork for the Refined Full-Wave Motor Speed Controller (PDF download) (Free) Add to trolley