5/2/2023 0 Comments Ulm2003a datasheet pdf![]() Is OnFocus basically compatible with APT ? What could be the problem ? I use this sketch to check the correct configuration and wiring, so that the stepper runs without problems. ![]() #define foc_m3 10 // connected to stepper driver M3 pin (pulled LOW #define foc_m2 9 // connected to stepper driver M2 pin (pulled LOW) #define foc_m1 8 // connected to stepper driver M1 pin (pulled LOW) #define foc_en 7 // connected to stepper driver enable pin (optional and recommended) If this IC is subjected to excess current or overvoltage, it may be destroyed. Precautions for Using This IC does not include built-in protection circuits for excess current or overvoltag e. #define foc_dir 4 // connected to stepper driver dir pin (required) ULN2003A 0 3 V ULN2004A 0 8 V Note 3: CL includes probe and jig capacitance. #define foc_step 3 // connected to stepper driver step pin (required) ![]() An Arduino Uno with DRV8825 belongs to the control of the stepper. ![]() But if I press APT Goto + or another button, the stepper barely moves and trembles. APT recognizes the Focuser: "Connected to Focuser". Download HTML ULN2003A Datasheet (PDF) - Texas Instruments Click here to check the latest version. Hi Howard, a question about OnFocus: I want to use OnFocus version 1.0a2 with APT, and connected OnFocus to ASCOM Poth. ![]()
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