Description
The TM1637 4-Digit LED Display Module is a compact alphanumeric display board featuring four 0.36-inch common anode 7-segment digits with colon points, making it ideal for clock, counter, and sensor readout applications. Driven by the TM1637 integrated circuit, this module requires only two signal lines (CLK and DIO) to control all four digits and the embedded colon, significantly reducing GPIO pin usage on host microcontrollers. The red LED segments offer adjustable brightness across eight gray levels, and the module operates on either 3.3V or 5V logic.
Key Features
- 4-digit 7-segment display with colon points (12 clock-style display points total)
- Driver IC: TM1637 reduces communication to just two signal lines
- Only two pins required on the microcontroller (CLK and DIO) to control four 8-segment LEDs
- Display color: Bright red (common anode)
- Adjustable display brightness: 8 gray levels (dim to bright)
- Logic level compatible: 3.3V and 5V microcontrollers (Arduino, ESP32, Raspberry Pi, STM32)
- Four M2 screw positioning holes (2.2mm diameter) for easy and secure mounting
- Modular design allows inter-module combination for multi-display setups
- Compact footprint with 0.36-inch digit height
Specification
- Display type: 4-digit 7-segment LED with colon (HH:MM format capable)
- Digit height: 0.36 inch (approximately 9.14 mm)
- Driver IC: TM1637 (serial interface, constant current drive)
- Communication: 2-wire serial (CLK, DIO) — not I2C, but similar
- Operating voltage: 3.0V to 5.5V DC (typical 3.3V or 5V)
- Operating current: ~80mA at 5V (all segments on, full brightness)
- Standby current: <10µA (display off via software)
- Brightness control: 8 levels (0 = off, 7 = maximum)
- Display color: Red (peak wavelength ~630–660nm)
- Module dimensions: Approximately 42mm × 24mm × 12mm (1.66" × 0.94" × 0.47")
- Mounting holes: 4 × M2 (2.2mm diameter) at corners
Applications
- Digital clocks and timers (real-time clock displays)
- Temperature and humidity readouts (DHT11, DHT22, BME280)
- Counter displays (odometer, people counter, production line tally)
- Voltage, current, and power meters (with INA219, ACS712)
- Speed and RPM indicators (tachometers)
- Stopwatch and countdown timer projects
- Arduino, ESP32, STM32, and Raspberry Pi GPIO-based projects
- Dashboard indicators for robotics and automation systems