Ender-5 rear mount pi

thingiverse

#WIP [Raspberry Pi mount](https://www.thingiverse.com/thing:4140386) redone from scratch in OpenScad to use a YYG-2 SLA-05VDC-SL-C. # Warning I am not an electronics professional and you follow these instructions at your own risk. This is mainly based on [Octoprint plugins for better and safer printing - PSU relay control](https://www.youtube.com/watch?v=ozCqqlPJ3a0) where mistakenly an **underrated 10A relay** is used which is considered dangerous (see the updated video description and comments). The 30A YYG-2 used here should be fine (especially with the decent flat shoe screw terminal) but if you see any mistakes please be sure to leave a comment. # Requirements - [YYG-2 SLA-05VDC-SL-C](https://de.aliexpress.com/i/4000589358083.html) (make sure to get the 5V version with flat shoe terminal) - [LM2596](https://de.aliexpress.com/i/32721507753.html) - [Raspberry Pi](https://www.raspberrypi.org/products/raspberry-pi-3-model-b/) - fork cable shoes - 16AWG wire for the 24v line - 20AWG wire for the 5v line - dupont connectors (or just get raspberry pi gpio cable and cut it accordingly) - soldering iron (mainly for the buck converter) - screw socket (optional, but eases connection to the buck converter) - hot glue (optional, but keeps everything in place and in my case the dupont connectors were quite loose) - [90 degree mini usb cable](https://www.delock.com/produkte/749_USB-2-0-Mini-5-pin/82680/merkmale.html) (right angled, 0.5m) - screws for the boards - multimeter to set voltage on the buck converter - electric tape (optional - used it to tape the bottom of the yyg-2 relay and the usb 5v pin) # Instructions TODO pin 2/9 for power pint 4/6/8 for relay https://www.raspberrypi.org/documentation/usage/gpio/images/GPIO-Pinout-Diagram-2.png # Notes - pin 8 is high on boot for a second (hardware) and thus causes the relay to switch. others are reported to not have this behaviour: https://www.raspberrypi.org/forums/viewtopic.php?t=7443 (might also be fixed by setting the yyg-2 to trigger on low by setting the jumper and configuring the pi accordingly - not yet tested)