Write professional code for measuring the RPM of a 3-wire fan
Measuring the RPM (Revolutions Per Minute) of a 3-wire fan using an Arduino. The code utilizes the tachometer output from the fan to count pulses and calculate the RPM, which is a common feature of 3-wire computer fans.
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Measures and displays the RPM of a 3-wire fan in real-time.
Key Features:
Interrupt-driven pulse counting
Debounce logic to prevent false readings
Regular RPM calculation intervals (every 500ms)
Serial output of RPM measurements
Main Components:
Setup function: Initializes serial communication and attaches interrupt
Loop function: Manages timing and triggers RPM calculations
Interrupt Service Routine (ISR): Counts pulses with debounce
Technical Details:
Uses volatile variables for interrupt safety
Output:
Displays RPM with 2 decimal places via serial monitor
Applications:
PC cooling system monitoring
HVAC system fan speed measurement
General-purpose fan speed monitoring projects
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