3pi robot turns off when PD0 pin is active

Support Robots
1

Hi:

I am using an Arduino development board to give commands to the 3pi robot via serial. However, whenever I connected anything to the PD0 pin (I am only having the robot receive instructions, so the TX pin is not needed), the robot turns off. I tried everything from using a fresh set of batteries, to powering it using a 5V source, to making sure that my circuit wasn’t shorted. Can anyone offer me any further insight into why this is happening?

2

Hello.

Are you sure you don’t have that pin set up as an output? You can check by measuring the pin voltage while connecting it through a large resistor (~10k) to power and then to ground. If the pin is an input, you should see the voltage get to 0 and 5V; if you see it just one way or the other, the pin is probably set up as an output.

If that isn’t it, can you post some pictures of your setup?

- Jan