Let's Make Robots!

fried

U7 got fried for some reason :(

I just got my Dagu 4 Channel Motor Controller, already a small part gave some smoke and one motor channel is not working anymore.

All four wheels were turning at the same time before the channel4 got fried.

Connections:

  VCC to Arduino 5V

4 PWM on the motor controller to 4 PWMs on the Arduino uno.

Dagu 4 channel motor driver fried

Hi,

I have fried my 4 channel motor driver and don't know how this can happpen. As you can see in the picture the Dual FET IC  U10 for motor 4 is blown away. This happened during a first test of my IOIO-SHR v2 robot. Before connecting the motor driver the program has been tested with an oscilloscope, all Outputs are working as expected. All connections has been double checked. Power supply testet with an voltmeter. Each PWM pin can be controlled from the Android phone with a Slider of my test app. PWM frequency was 1kHz.

This is a simple Arduino Light seeker. It has an Arduino Duemilinove on board. It is powered by 2 AA batteries for logic( with boost converter), and 4 AA batteries … Read more

Zen Master

I'm building a robot with many different voltages here.

I have managed to avoid voltage regulation by cheating, I run the motors that are rated for 4.5 volts at 6 volts from a RC NiCd battery, and I use an RC Electronic Speed Controller that can give 5 volts to the RC receiver, the wireless camera and the Picaxe. I feared that this might be a problem and turned to the all knowing LMR forums for help. And help I got...

Fritsl answered: