tag:blogger.com,1999:blog-7271315367558300569.post7656547491577208427..comments2024-02-01T05:10:14.833-08:00Comments on The Unorthodox Engineers: Review: More Arduino Motor Modules: A3967 EasyDriver, HG7881 "Dual H-Bridge", and ULN2003A "Stepper Driver"Anonymoushttp://www.blogger.com/profile/13912838690573000458noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-7271315367558300569.post-71748566344910283522014-06-18T00:12:26.746-07:002014-06-18T00:12:26.746-07:00Regarding the HG7881 bridge, I think the capacitor...Regarding the HG7881 bridge, I think the capacitor on the output is a bad thing, I had the same experience with blowing smoke using a PWM signal to drive it. Looks like the capacitor is charging/discharging through the output stage and I suspect it overloads the device. If I get a chance, I'll try again, removing the cap on the output pins (and also the pull ups to VCC which are counterproductive if you don't have the same VCC for the motor and the logic)Anonymoushttps://www.blogger.com/profile/16344238451272665909noreply@blogger.com