You can use any standard 9V battery to power the whole circuit, and the Push-ON (push ‘n’ hold) switch (S1) to activate the alarm function. An additional Electro-Magnetic Relay ... Panic Alarm Arduino ...

What You’ll Need: Arduino Uno (or any compatible board) Joystick module LED (any color) Resistor (220 ohms for the LED) Buzzer Breadboard Jumper wires Circuit Diagram: Joystick: VRx to Analog Pin A0 ...

A switch and buzzer is easy enough, but the key component of this build is an actuated rocker switch. It’s basically a normal toggle switch with two additional terminals for a coil that can move ...

By observing the graph, users can visualize the intensity and direction of the detected vibrations. Steps to Use Setup Arduino Code. Connect the Arduino Uno board to the ADXL335 accelerometer, LCD ...

The white LED strip also runs on the same external 12-V DC supply. The following hardware diagram gives you a clear idea of the entire hardware structure. The warm white LED strip used here is a 5-m ...