The 4-Digit Seven-Segment Display adds bright numeric output to clocks, timers, and counters, with decimal points and centre colon dots for time-based projects.
Design a clock, timer or counter into your next project using the pretty Adafruit 4-digit seven-segment display.
These bright crisp displays are good for adding numeric output. Besides the four 7-segments, there are decimal points on each digit and an extra wire for colon-dots in the centre (good for time-based projects).
These are 30mcd bright. You can drive these with less current to get the same brightness to save power, or crank them up to 20mA and have them at their brightest.
These displays are multiplexed, common-cathode. What that means it that you can use a 74HC595 or just 8 microcontroller pins if you can spare them to control the 8 anodes (7-seg + decimal) at about ~15mA each, and then connect NPN transistors or a TPIC6B595 to the cathodes to sink the 8*15mA = ~120mA maximum per digit.
We strongly recommend getting our backpack version, which comes with an LED driver on the back. This version is just the raw display, and requires a lot more work to get running!
Features
4-digit seven-segment display with decimal points on each digit
Extra centre colon-dots wire for time-based projects
30mcd brightness for crisp, clear numeric output
Adjustable brightness control via current regulation (up to 20mA)
Multiplexed, common-cathode configuration
Requires 8 microcontroller pins or 74HC595 shift register for anode control
NPN transistors or TPIC6B595 needed for cathode control
Maximum current draw: ~120mA per digit
Raw display module (backpack version sold separately with integrated LED driver)
