Seeeduino Nano is essentially a compact Arduino Uno which is fully compatible with the Arduino Nano. The microphone sound sensor – Grove Sound Sensor ... As for the relay and its driver circuit, you ...

They’re using a cheap sound sensor module and an Arduino to catch instantaneous photographs, with students caught in the act of popping balloons. The goal here was to keep things as simple as ...

Some work by sensing sound, some send out ... Here is the circuit for the Sparkfun Active Low style sensor. PIR Pin “+” connects to Arduino +5 one side of the 10K Resistor Connects to Arduino ...