Make sure the Hall Effect Sensor is working:
- Place sensor in board
- Use DC Power Supply to power the sensor
- Set supply to 5V and maximum of 1A
- Use a multimeter to measure the voltage and current values throughout the circuit
- Initially power the fan and measure the current by passing the red and black wires of the fan through the sensor
Additional
- Connect to resistor network to make sure output signal is 3.3V instead of 5V