Weather Station

thingiverse

A simple weather station based on an Arduino Uno and 2 sensors for temperature, atmospheric pressue and humidity, with a 3D printed case. The SCAD file has the case designs - my bed is 15x15 so I designed this as 2 smaller boxes that are screwed together internally. The circuit diagram shows how to interconnect the various components with the Arduino Uno. The ODS file has a full layout for stripboard/veroboard custom shield - I literally printed and stuck that onto my board and it worked perfectly when all components were soldered on and the Arduino was attached. Parts list: Arduino Uno (you could use a different Arduino of course) BMP280 pressure sensor (this is the 3.3V version, hence the MOSFETS) DHT11 temperature sensor CMU 16x2 LCD (or equivalent using HD44780 controller) 2 x 2N7000 MOSFETs 3 x 10k resistors 300 ohm resistor 10k variable resistor push-button switch 4xAA battery holder + battery clip DC barrel jack / power plug (2.1mm inner, 5.5mm outer) 36 hole x 36 hole stripboard / veroboard wire 10 x 3mm screws 2 x 3mm nuts and bolts I opted for a complete power-down when not in use. The Arduino Uno consumes a lot of power and would drain batteries fairly quickly. There are lots of interesting discussions online on Arduino power optimisation but the optimal solution requires using a bare microcontroller and no backlight, which defeats the concept of a quick project. Thanks to the authors of the pages explaining how to use the sensors: https://create.arduino.cc/projecthub/pibots555/how-to-connect-dht11-sensor-with-arduino-uno-f4d239 https://startingelectronics.org/tutorials/arduino/modules/pressure-sensor/