Little Bird
4-Digit Display
Add a clear numeric readout to your next microcontroller project with this simple 4-digit LED display module. It is suited to showing counters, timers, score...
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Add a clear numeric readout to your next microcontroller project with this simple 4-digit LED display module. It is suited to showing counters, timers, scores and sensor values without needing lots of I/O pins.
The module uses a 2-wire serial interface with CLK and DIO pins, and runs from either 3.3V or 5V. Wiring is straightforward, requiring just four connections: CLK, DIO, VCC and GND.
It is a handy fit for micro:bit projects, Arduino builds, classroom activities and general electronics prototyping. The package includes 1× 4-Digit LED Display Module.
Features:
- 4-Digit LED Display: Clear numeric readout for counters, timers, and sensor values
- 2-Wire Serial Interface: CLK and DIO pins for simple communication
- 3.3V / 5V Compatible: Works with micro:bit, Arduino, and other common boards
- Easy Wiring: Only 4 pins: CLK, DIO, VCC, and GND
Specifications:
- Interface: 2-wire serial interface (CLK and DIO)
- Operating voltage: 3.3V or 5V
- Required connections: CLK, DIO, VCC, and GND
- CLK: Clock input
- DIO: Serial data input/output
- VCC: 3.3V or 5V power supply
- GND: Ground
- Package contents: 1× 4-Digit LED Display Module
Use it for compact numeric displays in timers, scoreboards, data loggers, temperature readouts and other small embedded projects.
Jargon buster
Plain-language definitions for the technical terms used above.
- 2-wire serial interface
- A 2-wire serial interface sends data over just a couple of signal wires, typically a clock line and a data line. It lets a device be controlled with only a few microcontroller pins, leaving the rest free for other parts; common examples include I2C and similar clock-plus-data protocols.
- CLK
- CLK is a clock line that times when bits are sent and read on a synchronous serial bus such as SPI. Any device using a clock line must have its CLK connected to the controller's clock output so the two stay in step while data is transferred.
- DIO
- DIO means digital input/output, a pin that carries on/off (high/low) signals rather than a smoothly varying analogue voltage. In some 2-wire display and module protocols, DIO is the bidirectional data line that carries the commands and values being sent.
- GND
- GND is the ground or reference connection (0 V) for a circuit. When connecting two devices together, their grounds must be joined so both agree on what counts as a low or high signal.
- LED
- A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
- VCC
- VCC is the positive power-supply connection on a chip or module. Connecting it to the correct supply voltage is needed for the part to power on and helps avoid damaging the electronics.
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