Rotary Encoder Counter with TM1637
An Arduino study that reads rotary-encoder direction through interrupts and displays an increasing or decreasing count on a TM1637 module.
About the Project
A compact embedded experiment that reads rotary-encoder motion with direction information and sends the resulting count to a four-digit TM1637 LED display.
How It Works
Encoder channels A and B connect to Arduino interrupt pins. Each rising edge triggers forward() or backward(); the level of the other channel determines direction and increments or decrements the counter. The main loop calls showNumberDec() only when the value changes.
Technologies
- Arduino C++: interrupt routines and counter state.
- TM1637Display: four-digit display driver.
- Hardware interrupts: capture of encoder pulses outside the main loop.
Hardware
Arduino Uno/Mega/Nano, four-wire rotary encoder, and TM1637 display.
Technical Notes
The sketch demonstrates basic quadrature direction reading; it does not add a separate debounce filter for mechanical contact bounce.