Hi Daniel,

The two leads coming off your motor will attach to the Out A & Out B pins. These are the pins that will supply the power to your motor. It's OK to reverse these two wires. The only effect if you do this will be that the motor will run the other way.

Your 12v power will attach to the Vin & GND at the bottom of the H-bridge.

One White wire from one signal pin of a Digital port on EZB will be attached to the PMW pin on the left side of the H-bridge. One White wire from a different signal pin of a Digital port on EZB will be attached to the InA pin on the left side of the H-bridge. One White wire from a different signal pin of a Digital port on EZB will be attached to the InB pin on the left side of the H-bridge.

Red wire from the power pin of a digital port will attach to +5V(in) and finally a Black wire from a Ground pin of a Digital Port on EZB will be attached to GND on the left side of the H-bridge.

In ARC add a PMW control and set it's port to where you have the white (Signal) attached. You can now start you motor in a certain direction many ways. Movement panels or scripts by simply turning on the signal port attached to either Out A or Out B making sure one is on and the other is off. An important thing to remember is you need to have your PMW set up or the motor will not start. If left to zero your motor wont start.

Careful you don't reverse your motor too quickly. You could burn out half your H-bridge with fly back voltage. Those big Dewert motors are notorious for this.

Hope this helps.

I'm thinking the problem has got to be with my soldering. I've attached a diagram of my wiring along with a picture of my H bridge and the port settings. The PWM is set up and all the way to the top. The HBridge PWM controller with my right and left PWM both set at D8 (this was the only signal controller I saw that seemed appropriate). My motor connections are A&B on the right side of the Pololu board. My grounds are connected.

Anyone see a problem?

Daniel

Hi Daniel,

Sorry your having these problems. Unless something is burned out I'm sure we can get this up and runnng.

I've not used the PWM H-Bridge control but it looks like you have the right ports set and the wireing looks right. As long as you have the PWM sliders all the way up you should get movement. This is where you need to get your muil tester out to see if your etting the expected voltages you need.

First set your tester to DC voltage and review how to use and set it for your needs. Then disonnect the 12vdc external power supply and motor wires from the h-bridge. Turn on your 12vdc power supply and test the disconnected power supply leads to see if your geting 12vdc. Next power on the ezb and test the 5vdc connection point on the h-bridge to see if you are getting the right power to the bridge. (do you see any lights on the h-bridge when it's powered up?). Hook up your known working 12vdc power supply directly to the motor and switch it on. Your motor should start running if all is well. This will confirm the motor is OK. What are you useing for a 12vdc power supply? Can it supply enough amps to push the motor? With all power off and the EZB turned off, reconnect your external 12vdc power supply. Do not hook up the motor leads. Power up your 12vdc power supply and EZB. Start up ARC and let it connect to EZB. With your tester connected to the motor control pins connectors on the h-bridge toggel the on-off buttons on ARC's h-bridge conrtol (DO THIS SLOWLY AND DONT TOGGLE BACK AND FORTH QUICKLY! PAUSE BETWEEN ACTIONS! DOING SO COULD CAUSE FLYBACK VOLTAGE AND DAMAGE YOUR H-BRIDGE). Make sure your PWM sliders are up all the way. You should see your tester change between +12vdc and -12vdc when you push the buttons. Also you may be able to see LED lights on the H-Bridge come on and off as you move back and forth.

If all is OK till now reattach your motor to the h-bridge and see if ARC will now control it.

Following the above steps will tell you just what is working and where the problem starts.

Good luck and let us know what you find.

Oh ya; and have fun! Dave

Thanks Dave

This is really helpful.

So using my multi-tester I confirmed I have 12 volts going into the H Bridge (vin and ground) however there is no voltage coming out of the A & B leads to the motor (I used the EZ control to test). I then re-soldered my connections but again no power to the A&B. I'm assuming I've damaged the Pololu board. My next approach will be with a second board (guess I'll buy them in bulk ) but this time instead of solder I'll use clips for all my connections and then test.

Daniel

Did you test where are the five volts comes on too the H bridge? Do you have voltage there? Also test where the signal wires attach you should see 5 volts at each point when you toggle the movement on and off in E the builder.

EDIT: Sorry for sounding like a cavemen above. What I meant to say was to test the Ina & INb connectors on the H-Bridge when you toggle on and off the control in ARC. You should see the voltage change from 5vdc to zero as you turn it on and off.

Greetings @Mulberry, from another fellow B9er.

I haven't gotten very far with EZ-B myself, and so I might be wrong on this, but I looked at the diagram that you posted, and it did not look right to me. I have gotten a few motor controllers to work on mine. I do not think that your power (red and black) wires should be hooked up to separate outputs on the EZ-B. Each "digital out" has a ground (black) a hot pin (red) and a signal pin (white). There are also two pins up top just for power.

Your power can be hooked up to any of the hot, and ground pins. It would make sense to use either the dedicated 5v pins, or one of the ones that you are already using. Since your diagram didn't show which pins you hooked up to, I am wondering if you connected your power to signal pins.

Here is a drawing of two ways that it can be done.

Again, I am pretty new to this. Dave has done an incredible job setting his up. Perhaps he could review what I have posted and offer more clarification.

@Danger, thanks for clarifying this issue with a picture. I never thought Daniel may have attached to signal pins of each port. I've not see a picture of how he has it attached to EZB. However after looking at his pic of the port assignments closer he does have them pointed to the power and ground wires in his drawing.

@Daniel, Dangers Option 2 pictures above is exactly how I have all my h bridges set up. The problem with the PWM H-Bridge control your using is it has an extra set of direction toggle buttons and port assignments for a second motor. The H-bridge your using only controls one motor so the second input settings in your movement control panel needs to be set to ports that you have nothing attached to.

Each port has 3 pins, which are Gnd, +5 and Signal. The Gnd and +5 are for powering the device connected to the port. The Signal pin is connected to the EZ-B Microchip for reading or writing data from Digital or ADC. The Gnd and +5 pins are not connected to the Microchip, they are used only for powering the peripheral connected to the EZ-B.

For example, a servo has a 3 wire plug that connects to one of the EZ-B Digital Ports. The wires of a servo connector are Gnd, +5 and Signal. The Gnd and +5 power the motor and circuit within the servo. The Signal wire carries the information to tell the servo what position to move.

BAZINGA! You guys were spot on. I had my port wires incorrect. Once I followed Danger's option 2 and switched to a standard H-Bridge control the bugger sprang into action. You two have no idea how much of a help you've been. This was the last block to actually connecting all the components and firing up the big boy. A big martini for you both if we ever meet .

Daniel