recommended product for linear actuator

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mmbella
 
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recommended product for linear actuator

Post by mmbella »

Hello,

I am trying to control a linear actuator with a raspberry pi. The actuator requires 12 v with 3 AMPs max current. In order to retract and advance the actuator arm the polarity needs to be reversed. I would like to use some type of relay board to control the linear actuator. Does Adafruit offer such a product? Thanks in advance.

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adafruit_support_bill
 
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Re: recommended product for linear actuator

Post by adafruit_support_bill »

You would need 2 relays in an 'H-bridge' configuration to reverse polarity. https://en.wikipedia.org/wiki/H-bridge
Modern motor controllers use a solid-state H-bridge implemented with transistors. The DRV8871 driver board will let you control both direction and speed of the actuator: https://www.adafruit.com/product/3190

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mmbella
 
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Re: recommended product for linear actuator

Post by mmbella »

Thank you. Compatible with raspberry pi / pi zero?

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adafruit_support_bill
 
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Re: recommended product for linear actuator

Post by adafruit_support_bill »

Yes. You can control it with any of the Raspberry Pi processors. You just need 2 GPIO pins.

https://learn.adafruit.com/adafruit-drv ... ut/pinouts

Set IN1 HIGH and IN2 LOW to go in one direction.
Set IN1 LOW and IN2 HIGH for the opposite direction.

To control the speed, you can use PWM instead of just setting the pins HIGH.

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mmbella
 
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Re: recommended product for linear actuator

Post by mmbella »

Thanks again

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