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26" / 29mm x 56mm x 6
it will automatically append data so you don't have to worry about accidentally losing data if power is lost
to provide some filtering on the power supply
Built-in microSD slot - uses 2 more digital lines
16x8 1.2" LED Matrix + Backpack - Ultra Bright Square Green LEDs screw terminal 26" / 29mm x 56mmWhat's better than a single LED? Lots of LEDs! And what's better than lots of LEDs? TWO TIMES AS MANY LEDS!!! With the 16x8 LED Matrix Backpack we've doubled your project's matrix capacity by making it super easy to get two separate 8x8 matrices onto one handy board! Matrices like these are 'multiplexed' so to control 64 LEDs you need 16 pins and to control 128 LEDs, you'd need 24 pins. That's a lot of pins, and there are driver chips like the MAX7219
US$ 38.00
US$ 14.99
US$ 14.99