Raspberry Pi / Arduino Nano / Relay Module Case

Last crawled date: 4 years, 3 months ago

Use Case
This thing was designed to fit a Raspberry Pi 3 B, a 4 channel solid state relay board, an Arduino Nano (with removed headers) and be mounted under a desk; it could also be mounted on a wall.
the Raspberry Pi runs Pi-Hole and Node Red
the Arduino Nano is flashed with Firmata Standard and wired to the RPi via serial, with the use of a logic level converter; it's powered by a 12V PSU via the VIN pin
the relay board is wired to the Arduino Nano
a DS18B20 temp sensor is wired to the RPi GPIO
two 5050 RGB LED strips are wired to the Arduino Nano, with the use of mosfets, and powered by the same 12V PSU as the Arduino
The Raspberry Pi and the relay board are mounted to the case with 4 M3x10 screws each, and the arduino is press fitted into its slot.
There's a bracket included, which mounts with 2 M3x14 screws, that should clamp down on the wires going to and from the relay board; it should offer some strain relief.
The side compartment is housing the 12V power connector that powers the Arduino/LEDs, the cables that hang loose from the LED strips as well as the mosfets (the combined length of the strips is under 3m and they're 60leds/m, so the mosfets dont get hot at all).
Print Settings
The print pictured above has a 0.28 layer height; the only thing that is a must is printing with Supports / Touching build plate, other than that no particular settings.
Notes
The Arduino slot might be a little bit bigger than the PCB itself (my clone was a little bit wider than the specs). If thats the case some hot glue might come in handy.
The hole for the DC power connector has a diameter of 8.20mm.
To Do
The plan is to change the design as soon as I get some panel mounted connectors (C7 & C8 for the relays, suggestions are welcome for the LED strips) so everything can be easily removed, with no wires permanently attached to the case.