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!
Adafruit 16-Channel PWM Driver Hookup
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- dastels
- Posts: 15656
- Joined: Tue Oct 20, 2015 3:22 pm
Re: Adafruit 16-Channel PWM Driver Hookup
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
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
- czuvich
- Posts: 132
- Joined: Fri May 20, 2016 6:53 pm
Re: Adafruit 16-Channel PWM Driver Hookup
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.
- adafruit_support_bill
- Posts: 88089
- Joined: Sat Feb 07, 2009 10:11 am
Re: Adafruit 16-Channel PWM Driver Hookup
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.
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.
- czuvich
- Posts: 132
- Joined: Fri May 20, 2016 6:53 pm
Re: Adafruit 16-Channel PWM Driver Hookup
Thank you!! I'll try out the DRV8871 https://www.adafruit.com/product/3190!
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