Anet A8 PSU cover with switch, relays, fan and OctoPrint

thingiverse

Just another PSU cover with power switch for Anet A8 printer. This one can also contain a 2-channel relay board to remotely cut off power to the printer, an Orange Pi Zero Plus to run OctoPrint, a 5V AC/DC to power the Orange Pi, and an 8x8cm fan to cool down the PSU, the Orange Pi and the AC/DC board. My setup is as follows: * one Orange Pi Zero Plus (other versions of Orange Pi Zero can fit) * one SunFounder 2-channel relay module (can be bought on Amazon or AliExpress, see official wiki for additional details) * one power switch (note: there are two similar versions of this switch, one with countersink screw heads and one without, depending which one you buy, use the right screws) * one AC/DC board (220V to 5V) to power the Orange Pi * one 80x80x25 mm fan (I've used an old Coolermaster fan, but other fans like this or this should fit, I've powered it with 5V instead of 12V) * screws and nuts needed for mounting + 2 M3x10mm countersink head screws (for switch) + 10 M3x12mm countersink head screws (for switch reinforce, AC/DC board and Orange Pi board) + 4 M3x18mm countersink head screws (for relay module) + 7 M3x10mm round head screws (for front and right box panels) + 1 M3x18mm round head screw (for left box panel) + 2 M4x16mm round head screws (for fan, note: these are M4, not M3) * 23 M3 nuts * 2 M4 nuts * wires and connectors needed for connections + 16-18 AWG 220V wires for neutral, line and ground (from plug to internal fuse, from fuse to switch, from switch to relay and from relay to PSU) + 22 AWG 220V wires for neutral and line (from fuse to AC/DC) + 22 AWG 5V wires for Vcc and GND (from AC/DC to Orange Pi) + 6 dupont wires female-female (from Orange Pi to relay) To assemble the whole box, attach a schematic diagram as soon as I have free time to design it. **WARNING** Unfortunately, I discovered that the location of the Orange Pi is not optimal because the USB cable to the Anet board suffers interference (EMI) from the PSU. So I moved the OPi above the PSU attaching it to the Anet frame with this simple holder. All the interference disappeared.