I have the following module which i plan to use to control some peltier elements:http://www.ebay.co.uk/itm/BTS7970B-BTN7970B-power-motor-driver-Controller-module-70A-A2630-78M05-5V-25V-/300921027008?pt=Intercoms_Access_Controls&hash=item46104a79c0
However, i can't find any documentation for the module itself and I'm not totally sure how to get it to work properly. It has the following control pins:
if I run the following code using a small 12v motor to test it I can successfully control the speed of the motor but have yet to work out how to reverse direction. I have tried setting in1 and in2 to HIGH-LOW, LOW-HIGH, HIGH-HIGH, and LOW-LOW.
#define pinIn1 9
#define pinIn2 10
#define pinVin 11
char inChar = Serial.read();
case '1':driveMode1(); break;
for(int i=100; i<255; i++)
What I have found after testing:
In1 - set to HIGH or LOW makes no difference at all.
In2 - motor will run only when set to LOW.
Vin - PWMing this pin controls speed.
So is this module incapable of reversing direction or am I missing something. If it cannot reverse will I be fine using using the double SPDT relay method of switching polarity in conjunction with this module?