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Adafruit 16-Channel PWM Driver Hookup
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Adafruit 16-Channel PWM Driver Hookup

by czuvich on Thu Apr 15, 2021 10:49 am

I recently purchased the 16-Channel PWM Driver (https://www.adafruit.com/product/815), and I am trying to hook it up to a motor I purchased from ServoCity (https://www.servocity.com/116-rpm-premi ... w-encoder/).

The motor does not have a dedicated PWM input but instead has a Motor+ and Motor-. Do I hook up the PWM to the Motor+ and GND to Motor- and leave the V+ disconnected on the channel? I will still have a 12V supply hooked up to the V+/GND terminal block connection on the driver. Also, will there be any issues driving 3 of those motors at the same time from that driver? Thank you!

czuvich
 
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Re: Adafruit 16-Channel PWM Driver Hookup

by dastels on Thu Apr 15, 2021 11:16 am

The motor is a DC motor. The board is for servo motors.

Have a look at https://www.adafruit.com/product/3297, although it requires 2 PWM outputs per motor.

Depending on what controller you're using there are more specific driver boards. For example: https://www.adafruit.com/product/1438, https://www.adafruit.com/product/2348, and https://www.adafruit.com/product/2927. Those are all I2C and handle PWM generation on-board.

Dave

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Re: Adafruit 16-Channel PWM Driver Hookup

by czuvich on Thu Apr 15, 2021 11:40 am

Excellent! Thank you! Is there anything bad that could happen if the motors pull more than 1.2A (at most 5A)? The motors would only run for at most 5-6s.

czuvich
 
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Re: Adafruit 16-Channel PWM Driver Hookup

by adafruit_support_bill on Thu Apr 15, 2021 12:06 pm

The DRV8833 has built-in current limiting, so it can safely handle an overload condition. Although with a 1.2A limit, you will probably not get maximum performance from the motor.

The Motor Shield and Motor Wing do not have current limiting, so they are not a good match for that motor,

The DRV8871 is probably the best match. It has current limiting, but the current limit can be set for up to 3.6A - which is probably about the sweet-spot for maximum power from that motor.

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Re: Adafruit 16-Channel PWM Driver Hookup

by czuvich on Thu Apr 15, 2021 12:39 pm

Thank you!! I'll try out the DRV8871 https://www.adafruit.com/product/3190!

czuvich
 
Posts: 130
Joined: Fri May 20, 2016 6:53 pm

Please be positive and constructive with your questions and comments.