Small 1.2" 8x8 Ultra Bright Square Yellow LED Matrix + Backpack Ecosystem_Qwiic/STEMMA QT 5 10K resistors - Great

5 10K resistors - Great for pullups & pulldowns

We even have a tutorial on how to use two free software programs to plot your data The included RTC (Real Time Clock) can be used to timestamp all your data with the current time so that you know precisely what happened when

Polar T34 Heart Rate Transmitter

At its core is an ATmega328P with 32KB of flash and 2KB of RAM

No other cables or connectors or accessories are included

Small 1.2" 8x8 Ultra Bright Square Yellow LED Matrix + Backpack Ecosystem_Qwiic/STEMMA QT 5 10K resistors - GreatWhat's better than a single LED? Lots of LEDs! Matrices like these are 'multiplexed' so to control 64 LEDs you need 16 pins. That's a lot of pins, and there are driver chips like the MAX7219 that can control a matrix for you but there's a lot of wiring to set up and they take up a ton of space. Here at Adafruit, we feel your pain! After all, wouldn't it be awesome if you could control a matrix without tons of wiring? That's where these lovely LED