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Raspberry Pi Projects

1 Post authored by: mrwolfe

I'm working on a 3D controller hat for a Raspberry Pi. This is a glimpse of the hardware prototype. You can see the USB and ethernet ports of the Pi on the left side.

 

Pilolu 3D controller board

 

Features:

 

4 motor control channels

  - compatible with A4988 and DRV8825 Stepstick motor drivers

  - Motor supply voltage up to 45V

 

3 High power (15A Max) 12v/24v discrete switch channels to drive fans, heaters, extruders, spindles etc.

 

6 Digital switch inputs for limit switches. Can also be used as 3.3V digital outputs

 

4 Thermistor input channels

 

4 Unassigned analogue inputs.

 

SPI port for expansion.

 

The board provides power to the Pi, and can run from 7-12V DC. It has separate supplies for the bed and motors.

 

The software is the hard bit (for me at least).  I'm looking at a real-time raspbian kernel at the moment.  The Pi will probably have to run a kernel device driver to drive the motors, but will probably be able to use the BCM2835 GPIO library for everything else.

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