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Add LICENSE
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Hendrik v. Raven's avatar 83389cbd
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README.md

Coil matrix MOSFET driver PCBs

This repository contains the Kicad design files for a isolated DCDC converter module to drive N-channel MOSFETs and a control PCB to control up to 7 coils using GPIOs.

Control PCB

The control PCB is designed to work with the matrix like MOSFET box. It is inteded to switch power supplies to coils as needed. Each PCB can control 2 power supplies which are connected to 7 coils each.

The seven coils outputs are isolated from the control logic, each one needs an independent, floating, power supply to drive it.

The control input connectors are designed to match the Adafruit GPIO Expander Bonnet, but they can also be connected to anything else (single 5V control pin per MOSFET).

Power supply PCB

The power supply PCB uses a DCDC converter module from Recom to convert 5V to isolated +15V. The output is filtered to reduce the switching noise, this also loweres the output voltage to approx. 13.5V. The output is floating and can be used to drive N-channel MOSFETs on the high-side of the coils.

Version changes

Revision 2

  • fixed the symbol and output pins of the DC-DC converter. +Vout and -Vout were swapped