Datasheet

This is a simple yet enjoyable Grove to use. The piezo can be connected to digital outputs, and will emit
a tone when the output is high. Alternatively it can be connected to an analog pulse-width modulation
output to generate various tones and effects.
Relay
The Grove-Relay module is a digital normally-open switch. it is controlled by a relativly low voltage(5V)
pin(D1) and is capable of switching a much higher voltages and currents. When set the control pin (D1)
to HIGH, the port "Com" and "On" will be connected and the LED will be light, when set to low, these 2
ports will be disconnected and the LED will go out. The maximum voltage and current that can be
controlled by this module upto 250V at 10 amps.
Please exercise great care when working with high voltages – if in doubt please contact a professional
such as a licensed electrician for help.