2011-10-18

[public] 24.7K views, 220 likes, 7.00 dislikes audio only

Applied Science

http://www.techkits.com/kits/index.htm#sla7062

Stepper motors can be made to rotate more smoothly by providing simulated sine waves. The SLA7062 chip uses internal PWM to provide sinusoidal current waveforms to unipolar stepper motors. I have this working fairly well, but the PWM frequency is acoustically apparent and annoying.