Ender 3 Pi Powerbox

thingiverse

WARNING! If you mess this up, you could start a fire or get electrocuted, or BOTH! If you don't know what you're doing, STOP! So, with the warning out of the way, let's move forward. When completed, power control of the printer is handled through Octoprint (a.k.a. a python script on pi) using 5v, ground and pin18 (although that can be controlled via the script) to turn a relay on/off. Video: https://youtu.be/On9ZEO7QUV8 Bill of materials: 10 - M2x4mm screws 4x - lid 4x - relay mount 2x - plug 2 - M5x20mm screws to attach to 20x20 rail 3 - 14-16 gauge crimp female ends (optional if you want to solder) 1 - M5 Tap kit (watch YouTube videos to learn how to use it, if needed). Costs about $13 USD. Required to create M5 threaded holes on the 20x20 rail of the Ender 3. 1 - Pi controllable relay - https://www.amazon.com/gp/product/B082S47JXM/ref=ppx_yo_dt_b_asin_title_o06_s01 1 - C14 Inlet Module Connector Male Power Socket with Switch - https://www.amazon.com/gp/product/B078NT4F61/ref=ppx_yo_dt_b_asin_title_o02_s00 3 - Female Jumper wires for connection to Pi There's a nice Octoprint plugin called "PSU Control" that works without any scripts. https://plugins.octoprint.org/plugins/psucontrol Or you can use the Octoprint plugin, "System Command Editor" to run python at the command prompt in Octoprint. The python scripts assume that you're using pin 18 for the control line. Python Scripts: nano power-on.py import RPi.GPIO as GPIO import time GPIO.setmode(GPIO.BCM) GPIO.setwarnings(False) GPIO.setup(18,GPIO.OUT) print "Switch ON" GPIO.output(18,GPIO.HIGH) nano power-off.py import RPi.GPIO as GPIO import time GPIO.setmode(GPIO.BCM) GPIO.setwarnings(False) GPIO.setup(18,GPIO.OUT) print "Switch OFF" GPIO.output(18,GPIO.LOW)