Adafruit
Red 7-segment clock display - 0.56 digit height
A red 4-digit 7-segment clock display with 0.56″ (14.2 mm) digit height. Each digit includes a decimal point, plus a centre colon for time-based displays. Br...
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A red 4-digit 7-segment clock display with 0.56″ (14.2 mm) digit height. Each digit includes a decimal point, plus a centre colon for time-based displays. Bright at 18 mcd, these displays are easy to read and can be dimmed by reducing drive current to save power.
This is a raw multiplexed common-cathode display — it requires external driver circuitry such as a shift register (e.g. 74HC595) or dedicated LED driver. You'll need 8 microcontroller pins or a shift register to control the anodes (~15 mA each), and NPN transistors or a high-power shift register to sink up to ~160 mA per digit on the cathode side.
Key Features
- 4-Digit 7-Segment Display – Plus decimal points and centre colon
- 0.56″ Digit Height – Clear, readable digits
- 18 mcd Brightness – Bright red LEDs, adjustable by varying drive current
- Common Cathode, Multiplexed – Standard configuration for driver ICs and shift registers
Specifications
- Digit Height – 0.56″ (14.2 mm)
- Colour – Red
- Brightness – 18 mcd
- Max Current per Segment – 20 mA
- Configuration – Common cathode, multiplexed
- Segments – 7 segments + decimal point per digit, plus centre colon
Ideal For
- Clocks and timers
- Counters and scoreboards
- Instrument readouts
- Arduino and microcontroller display projects
Package Contents
- 1× Red 4-Digit 7-Segment Clock Display (0.56″)
Jargon buster
Plain-language definitions for the technical terms used above.
- LED driver
- An LED driver is a control chip or circuit that supplies and switches power to LEDs. For a display board, it reduces the number of microcontroller pins needed and handles tasks like lighting the right segments and adjusting brightness.
- 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.
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