Additional Info

• What you will learn:

  • Science: The student learns about windmeasuring

  • Engineering: Mechanical engineering, programming

  • Technology: 3D-modelling and printing, basic electricity and electronics. 

• Expected Time:

  120h

• Materials & Recycled Materials:
  • Arduino Uno
  • 4 pcs IrDa transceiver (TCRT1000 or similar)
  • Unipolar Hall sensor
  • Neodym magnet 5x5 mm
  • I2C-compatible 16x2 LCD-screen
  • 2 pcs ball bearings 35x15x12 mm
• Guide:
  • Read the guide while looking at the given pictures. Design the 3D-printable parts according with the guide requirements and personal style.
  • Speed sensor: in the speed sensor the magnet activates the Hall-sensor when the last one is bypassed. The sensor must be of unipolar type and the magnet has to be correctly assembled. 34-40 cm long wires are soldered to the circuit board. Sensor’s circuit board and bearing are placed lower 3D-printed part. Magnet and windmeter spoons are attached to the upper 3D-printed part. Lower part is connected to the Arduino’s case by a 3D-printed pipe.
  • Direction sensor: IR-receptors react to the 3D-printed top part’s reflected light. There is a IR-Led and a IR-transistor in the sensor. 30-40 cm long wires are soldered to the circuit board. Sensor’s circuit board and bearing are placed in the 3D-printed lower part. Upper part is non-reflective material and a 140 ° wide surface is fixed to it. The 3D-printed direction arrow is attached to the upper part. Lower part is connected to the Arduino Uno’s case via 3D-printed pipe.
  • Arduino’s case: 3D-modeled case is 3D-printed for the Arduino and the LCD-display. A circuit board is designed to Arduino’s top, where sensor’s wires and LCD-display are connected.
  • Programming: Speed sensor is read with a stop and sensor is to be connected to Arduino’s inputs D2 or D3. Direction is read at digital inputs and sensor is connected to Arduino inputs D8-D11. LCD-display is driven via I2C pins and display is connected to connectors SDA and SCL.
• Further Steps:
  • Once the assembly works, try modeling and building a second one with different style or size.
• Software used in the project:
  • - Solidworks
  • - Ultimaker Cura
  • - Eagle.
• Difficulty level: Hard
• Developed By: Salpaus