Dual Hbridge W/PWM icon Dual Hbridge W/PWM Dual H-Bridge w/PWM movement panel: control two DC motors' direction and speed via EZ-B PWM for responsive forward/reverse/turning. Try it →

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#1  

Try to contact them using the link at the top. (ABOUT then CONTACT US). They get back with you soon. First what is it doing?

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#2  

How do you mean bad? I had a couple (not EZ-Robots ones) turn up which were bad (motor moved but horn didn't) but were very easy to fix by opening them up and pushing everything back in to place).