I have purchased a PCA9685 16-Channel Servo Driver and have not been able to get it to work, when I run the Servo example the servo motors do nothing. Tested with 2 versions of Arduino Uno, using 2 different computers with different operating systems (MacOS & Ubuntu). In the video of the following …

Nice video but it did not help me. Your best chance is to post a schematic, not a frizzy thing with links to technical information on each hardware device. Along with that post the code.

@gilshultz thanks for answering. I made the pin connections respecting the indications of the creator of the module, see the link... [image] Adafruit PCA9685 16-Channel Servo Driver Learn how to connect and program the 16-channel 12-bit PWM/Servo Driver with Arduino, Python or CircuitP…

The creator of the module states that there are no problems in my wiring, and they suggest I contact the seller, look at the link... https://forums.adafruit.com/viewtopic.php?f=8&t=181594

What is the brand/model of the servo? Make sure that you have the correct wiring for the servo connector, not all servos have the power/ground/signal pins arranged the same way.

@david_2018 thanks for answering. I used a PC power source, with 5V it can supply up to 25A. The 4 motors used cannot consume 25A.

Please confirm a second/spare board also does not work. Do these servos work independently with a simple servo sketch. It is incumbent on you when asking for help to supply a proper schematic.

You seem to be running power to everything including the servos through tiny thin wires and a breadboard. Both are bad ideas particularly with those fairly large servos. The servos at least should be more directly connected to the power supply using thicker wire and decent connectors. Steve

I was not referring to the power source, but to the connector on the servo - make sure those are plugged in correctly.

Thanks all for your answers and your advice. Following your suggestions I did 3 tests with 3 servo motors (one for each test) of different sizes, including a micro servo. The result does not change, please look in this link a second video... [Problem with PCA9685 16-Channel Servo Driver - pa…

So you didn't bother changing the wiring but still you've convinced yourself that the wiring isn't the problem. O.k. Have you run an I2C Scanner (plenty of examples via Google) to check that the board is visible and with the address you're expecting?

Problem with PCA9685 16-Channel Servo Driver

Community General Discussion

roilldcuba July 28, 2021, 2:11pm 15

@david_2018 in the links exposed in comment #3 you will find every detail about the tests.

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Problem with PCA9685 16-Channel Servo Driver

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