A few years back I threw together a temperature and humidity project to test the humidity of my home before and after a whole home humidifier installation. The result was abysmal and the net change was barely detectable evan 60 days after installation so this quickly became a trinket on my desk to monitor the conditions of my office.

Having acquired a 3D printer and having a desire to learn AutoDesk Fusion 360 I decided to give this project just a little more life, plus help to prevent damage from when it "accidently" falls off my desk because the cat wants knock it around my office.

Pretty basic shell/bumper that has vents next to the temp/humid sensor (incase I do make a lid), a rear hole for a powered USB cable, and support posts that line up with the PCBs drill holes. The support posts provide 1 mm clearance from the base of the shell and the PCB fits in snuggly. If I did have to build this circuit again, I would change the location of some components, as it current layout make a lid a more time consuming task to design.

I have included a few screen grabs from Fusion, an STL file, and the Arduino Code (ino) file. The Arduino Code has a nice pin out table as well as some decent comments (I surprise myself sometimes). Here is a link to the AutoDesk Fusion 360 Files

Main Electronic Components: DHT22 Perma-Proto Half-sized Breadboard PCB ATmega328P a .96" SPI Serial OLED from eBay 16MHz Crystal 22pF Capacitor (Quantity: 2) Tactile Reset Switch 10K pull-up resistor for DHT22 1K pull-up resistor for ATmega