I am using Moteino Mega to drive a DC motor through the following two different motor drivers at 12V.
http://www.ebay.com/itm/171442705595
http://www.ebay.com/itm/Double-BTS7960B-DC-43A-Stepper-Motor-Driver-H-Bridge-PWM-For-Arduino-smart-Car-/200950936475?
The code is standard code where PWM is driven from 0 to 250.
My problem is at 250PWM the output current is still at about 2.4 amp for both drivers. The heat sink does not even warm.
How can I improve the output. Change the PWM signal from 3.3 to 5v or what?
Thank you for your advice in advance.