The shield provides a simple solution for a universal I/O (input/output) for the Arduino boards, including the Uno, Leonardo, and Mega2560. It features many useful subsections, including 7-segment displays, pushbuttons, LEDs, and more.
Four LEDs
Three pushbuttons
A reset button
A piezo-buzzer
An LED display module (four-digit, seven-segment)
Two serial LED display driver ICs(74HC595)
A multi-turn trimpot (10K)
A port for DS18B20 temperature sensor
A port for TSOP1838 infrared receiver module
A APC220 wireless module interface (serial/UART interface)
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