Hi everyone, I'm using arduino UNO, an H-bridge driver and a 24V DC motor. At the moment my arduino is sending a PWM signal with a 19Khz frequency more or less.
1 - My first question is, can I send the arduino output signal directly to 1 of the 2 pwm pins of the driver? I can't find the driver datasheet, but through this link: http://www.arduinothaishop.com/productdetail.html?id=6063 it seems the driver has 6 pins that communicate with the microcontroller (arduino UNO). The PWM pins are PL and PR ( CW and CCW ); I think EN it's a pin that is used to "activate" the driver (I just have to declare it in my code); and I believe US and IS are just to observe the signals on a scope..
2 - My second question is, since I'm using a powerful motor do I need something to protect my driver (diode?) every time I want to change the speed of the motor? http://www.batteryspace.com/dc-motor-heavy-duty-24v-dc-motor-750w-2600rpm-28a-rate.aspx To begin I want to start with something simple, so I'm not even thinking about changing the direction.
3 - Even though I'm going to use the motor with no-load (at least for now..), if I use 2x12V batteries in series, will they give enough voltage and current to the driver in order to the motor move in one direction? The specifications say that in no load condition, the output current = 1.5A.
Thanks in advanced!