2x Relay Board Mount
thingiverse
I made this thing secure a pair of my favorite relay boards on to a flat surface. Here is an example of the boards that will fit (they are well designed compared to most): https://www.amazon.com/FICBOX-Channel-Optocoupler-Support-Trigger/dp/B07BS6PCR6/ref=sr_1_5?keywords=arduino+relay&qid=1563149173&s=electronics&sr=1-5 There are 2 different versions: dualRelayMount.stl uses 8x M3 bolts to secure the boards. dualRelayMount2.stl is hardware free, using melt-down pins to secure the boards. Heat a medium sized flathead screwdriver with a lighter and press down on the pins. If the pins turn 'gummy feeling' and want to come off with the screwdriver, you probably just need to get your screwdriver a little hotter. Version 2 is shown in the photo. Both versions have 4x 4mm holes for mounting. No supports necessary for either as well.
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