Home        Store        Docs        Blog

Light not working with PWM signal

(Brian Proksch) #1

I am using the example arduino code provided by BlueRobotics for the Lumen Subsea Light. Power supply for the light is set at 10V. I have verified on an oscilloscope that the PWM signal is being output correctly at a pulse width of 1700us at a frequency of 50Hz, but there is no output from the light. I am not sure what the problem might be.

(Patrick José Pereira) #2

Hi Brian,

Do you have the Arduino ground connected to your power supply ground ?

(Brian Proksch) #3

I figured out that was the problem, it is working properly now with the power supply ground connected.

I have a Newton Subsea Gripper that is still not working using the same configuration. When a PWM open or close signal is applied, the power supply drops down to 5v at 0.2 amps and the gripper doesn’t close or open.

(Patrick José Pereira) #4

Hi Brian,

Probably your power supply is not providing enough power for the gripper, can you increase the current limit of your power supply to 4~6A with 9V ?

(Brian Proksch) #5

That’s it! Swapped power supplies with one that could output more than one amp and now the gripper is working.

Thank you