Ender 3 Sonoff & RPi Power Supply
Description
This is my creation to make better use of the Ender 3, OctoPI and Sonoff Basic. WHY?: I designed this for my brother, who also got an Ender 3 just after I did, and wanted only 1 power cable to extend down to the wall outlet, or powerbar. (while using a Raspberry Pi for Octoprint) I also wanted the Ender 3 to 'auto-on', and 'auto-off' when I spooled a print job. I used the Tasmota-MQTT, and MQTT plugins in OctoPrint, together with a Sonoff Basic to accomplish this. (Manual Gcode inserted in to the Printer profile using M80 / M81 commands) - (PDF) Document Included to help with this task! With this design, I 'broke open' the RPI Power Supply ac/dc adapter, and used just the circuit board / microUSB cable. The design has 2 compartments - 1 for the Sonoff basic, which goes with the big hole for the power switch, and the space for the RPI power Supply. Be sure to test and validate your RPI power supply is up for the task - I DIDN'T and that caused me to redesign the entire project as the new replacement circuit board was a completely different shape/size. I changed the design to try and share this with everyone, the circuit boards now are affixed to a 'universal' tray - You can edit the tray and make it fit your specific circuit board, as they vary greatly. This keeps the shell universal, and unmodified for future changes (say your PI Power supply dies, and you need to replace it). The trays each only fit one-way and are a very tight fit. If you need to remove a tray, using a screwdriver (slot / flat-head) twist the head while wedged under the tray to pop it out of it's guide slot. Then do the same to the tab on the same side. Once both TABS are popped out slightly, you can then pry the board using the bottom surface as leverage, and the tray will come right out. I used a SONOFF BASIC R1.0, The Power switch 'overlaps' the circuit board, so this flat area was important to dictate the orientation/direction of the Sonoff module. I have uploaded pictures of v2.0, as I have not yet completed assembling v3.0 - Instead I decided to share my 'Generic' files first. I will be uploading the trays, modified for my specific circuit boards once completed. For now, if you like this design, you can get started printing the case and top, and modifying the trays for your own needs. v3.0 (the STL files included) have wire management holes through the walls that should allow for all required connectivity. The project is wired such that the power switch kills power for the entire circuit, but when on; it allows the RPI t o run 24/7 while allowing for remote power-on and off for the Ender 3 printer. The Case has the Vslot rail insert, to allow it to be installed from the BACK of the printer (remove the endcap) and slide it in to position behind the LCD display. It will stop in the correct position, to align the power cord with the Ender 3 Power Supply. (please see photo's) Parts List - Links provided are NOT affiliate links. for reference only. ---------- 1 - 12V DC switch - AliExpress (https://bit.ly/2Gu5LlK) 1 - PC Power cord - PricessAuto This is additional to the one included with the Ender 3 (https://bit.ly/2MhKgbB) 1 - AC Input block - AliExpress (my prototype used one from a broken ATX Power Supply (https://bit.ly/2Kaplo7) 2 - 6mm grommets - AliExpress (https://bit.ly/2yjJQcd) For now, this thing is a work in progress. Please let me know your thoughts. Comments welcomed.
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