Target for fan-speed upgrade SMD assembly done Test fit Preparing spacers One spacer done Done with soldering BLDC commutation signal Signal after comparator Side view Top view BLDC commutation signal Back to an orderly state Insulation only works if it doesn't slip Hopefully the final programming Added ISP connector Wire routing That is evil Not enough wire Fixed safety-earth cable Some shrinking tube for mechanical support That didn't last very long YOUYUE 858D+ PCB YOUYUE 858D+ PCB Good policy - wasn't implemented OPTO isolation slot Hrrrmmp! Thermo couple I had to redo the lousy ground wire IMGP8559.JPG Not so safe safety-earth connetion Not so safe safety-earth connetion Doesn't stick and melts when device is on IMGP8557.JPG