Problem using servo shield on Arduino Mega 2560 r3

Projects General Guidance
1

Hi!

I'm trying to use Adafruit 16-channel 12-bit PWM/Servo shield on my Arduino Mega. When I try to run the pwm servo example, nothing happens. I have used the shield on my Arduino Uno with no problem. But when I change to Mega, my servo motor is not running.

I use an external power supply to the servo. I have measured the voltage over SCL and SDA connection, showing 4,8V, and over the V+ and GND on the shield. I also checked the PWM signal using oscilloscope, showing no signal. The servo works fine connecting it directly to the Mega, but I want to use the shield.

I'm thinking maybe there is something wrong with the PWM signal, or is it some problem using Adafruit_PWMServoDriver.h library on Mega? Is there someone else having the same problem as me, and have the solution on the problem?

2

Do all the connections match up when you use the shield on a MEGA? Check the SCL and SCA. Are there changes you need to do to get it to work? I would ask Adafruit support.

3

Yes, all pins match up. I will ask Adafruit.

Thanks for the advice!