Creality Ender-3 station (LCD + Raspberry Pi)
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This is a station for using Raspberry Pi3 B+ with Creality Ender-3 (Octopi/Octoprint) and also to protect electronics of printer LCD.
05/01/2020
I made 3 different versions:
1) ender station (clean station just to support Raspberry Pi 3 B+ and protect electronics of printer LCD)
2) ender station C (same as number 1 but with Camera support and cable camera passthrough)
3) ender station BFC (same as number 1 but with Button hole, Fan hole, Camera mount and cable camera passthrough)
This version is upgraded and has some fixes:
-better tolerance to fit Raspberry Pi
-perfect LCD fitting
-better extrusion 4040 fitting
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Instructions for adding a power pushbutton with status indicator LED:
Power button:
1) connect GPIO3 and GND (pin 5 and 6) to pushbutton
2) edit your /boot/config.txt file and add the following line:
dtoverlay=gpio-shutdown,gpio_pin=3
3) I use a power switch to power on (and to completely power switch off, since it's not possible to cut power to Raspberry Pi only by software)
LED power/status indicator:
1) Use a 330Ω resistor connected to a small LED (about 2V, but one of slightly higher voltage will work well too - just keep it below 5V); the LED is powered by the Pi's TxD serial output pin (pin 8) and the resistor protects the Pi against your LED requesting high current draws that can fry your Pi; the LED's "short" (negative/cathode) lead connects to the…
