10A motor driver problem

Hi everybody,

I have a problem with my motor controller. I bought an motor controller from ebay which is http://www.ebay.com/itm/251347662854?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649

I connected +5V and GND without PWM and DIR. Motor turns on full speed.

after that I connected PWM and DIR pins to my arduino Mega PWM pins and nothing changed.
I had bought two of it and first one is burned out.

My power supply is 24V-12A battery.

Another problem is when I connected driver arduino light is getting off after a few seconds and turns down.

What is wrong with this controller?

Thanks for your helps

Your question assumes that there is something wrong with the controller. It is much more likely that you are using the controller incorrectly, but you haven't posted enough information for anyone to know.

Post your complete circuit diagram, showing how all the power supplies, the Arduino, the motor driver and the motor(s) are connected. Also describe the signals you have sent to PWM and DIR, and post the Arduino program (using code tags (#)). Then perhaps you will get a helpful reply.

I connected +5V and GND without PWM and DIR. Motor turns on full speed.

If you allow the PWM and DIR pins to float (i.e., not connected to ground or 5v) , there is no telling what the board will do.

Hi, have you got any overload protection for the motor controller, a fuse rated at 10A should be fitted in the supply between the battery and the controller.

Tom..... :slight_smile:

From the picture its clear this is a very simple H-bridge controller just using
some logic gates and MOSFET drivers.

Such drivers cannot hold the top MOSFET on indefinitely (only a few ms), so you
must use PWM at < 100% duty cycle. If you don’t the top MOSFETs lose their
bootstrapped gate supply and drift into the linear region in which they will
rapidly fry.

When stopped the lower MOSFETs should both be on to recharge the
bootstrapped supplies on the MOSFET drivers.

If there is a datasheet for the board it should mention this!

If you want to test the thing safely disconnect motors and connect back-to-back LEDs
with a series resistor in their place, and get it all working without high currents.