LED seven segment display
What is much better than an individual Light-emitting Diode? Lots of LEDs! An enjoyable option to make a little show is to utilize an 8x8 matrix or a 4-digit 7-segment screen. Matrices like these are 'multiplexed' - so to regulate all of the seven-segment LEDs you may need 14 pins. Which is a lot of pins, and you will find motorist chips like MAX7219 that may get a handle on a matrix for you personally but there's a lot of wiring to set up and additionally they use up a lot of space. Only at Adafruit we feel your discomfort! After all, wouldn't it be awesome if you could manage a matrix without tons of wiring? This is where these adorable LED matrix backpacks are offered in. We've them in two tastes - a mini 8x8 and a 4-digit 0.56" 7-segment. They work perfectly using the matrices we stock in Adafruit shop while making including a bright little screen insignificant.
The matrices make use of a motorist processor chip that does all heavy-lifting available: They have an integrated time clock so they multiplex the show. They normally use constant-current drivers for ultra-bright, constant color (the photos above are photographed during the dimmest setting-to avoid overloading our digital camera!), 1/16 action screen dimming, all via an easy I2C program. The backpacks incorporate address-selection jumpers in order to link up to four mini 8x8's or eight 7-segments (or a mixture, such as for instance four mini 8x8's and four 7-segments, etc) for a passing fancy I2C bus.
The merchandise system includes:
Some soldering must connect the matrix on the backpack but its easy to complete and only takes about 5 minutes.