K40 Laser Relay control box
thingiverse
This was a relay box that I created for my K40 laser. Has separate input for the mains 240v accessories (extractor fan, water pump, air assist pump) and the 5V circuits (going to the buttons on the control panel / 5V supply for the relay). Recommended upgrade is to have a removable connector between the 5V leads coming from the K40 laser and the relay box, that way you can still move the K40 laser independent of the relay box Uses this relay (4 channel 5V) - https://www.ebay.co.uk/itm/5V-12V-24V-1-2-4-8-Channel-Relay-High-Low-Level-Optocoupler-Module-Arduino-PI/263560749851?hash=item3d5d71e31b:m:mmiqmRDYUbao0Bu3hzbUxZA uses x6 3.5 x 16mm screws uses x4 3.0 x 12mm screws uses x2 PG11 cable glands
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