Review on 8 Channel Relay Module Board For Raspberry Pi 4B/3B+/3B/2B/A+/B+/Zero by Trevor Blazis
Can't get started
I worked on it for three days and tried everything. I've tried many other motor drivers with both Raspberry Pi and Arduino and never had so many headaches. The documentation is bad. After all, I've never managed to get a stepper motor to spin; he just twitched back and forth. [Using Raspberry Pi 4B]
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