Technik Gegg

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Tools, APP Software Used etc.

KiCAD

Kicad

Description

SMuFF Mini Relay Board

This is a mini relay board for the SMuFF project. It allows the controller to switch the Feeder stepper motor signals (1A, 1B / 2A, 2B) between the 3D printer and the controller board back and forth.

For printing the 3D printer is controlling the Feeder stepper, on tool changes the SMuFF controller takes over until the tool change has been accomplished.

I made this PCB to get rid of the (in relation) huge Adafruit 4 switch Relay module which works great for this task but makes the enclosure larger than it has to be.

By using an optocoupler, the relay board is fully galvanically isolated and thus protects the I/O port of the controller (STM32 in this case) from being electrically damaged.

Read more about this project in detail here.

Code

Firmware source code on Github

https://github.com/technik-gegg/SMuFF-1.1

Schematic and Layout

Schematics

https://github.com/technik-gegg/SMuFF-1.1/blob/SMuFF-2.0/Schematics/SMuFF%20Relay%20board/Relay-Board.sch

CAD-Custom parts and enclosures

Project on Thingiverse

https://www.thingiverse.com/thing:4827853

Download Gerbers Download BOM(Bill of materials)

Aug 02,2021

3,094 views

SMuFF Mini Relay Board

A miniaturized relay board for the SMuFF project (https://www.thingiverse.com/thing:4827853)

3094

Published: Aug 02,2021

Standard PCB

Download Gerber file 31

BOM(Bill of materials)

PCBWay Donate 10% cost To Author

Only PCB

PCB+Assembly

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Project images are for reference only. Actual production is based on the manufacturing files on the project page. Please review the designer's notes (e.g., PCB thickness) and select the appropriate options. PCBWay is not responsible for issues caused by unsuitable parameter selections.
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