Halloween “head-in-a-jar” Candy Dispenser Decoration With Arduino

This project explains how to build a candy dispenser to use as Halloween decoration build with Arduino Uno.

The leds light up in a back and forward sequence in red and will turn into green if the ultrasonic sensor detects a hand. Next, a servo will open a trapdoor that contains candy and it will fall directly into your hand.

We got our inspiration to do this Halloween prank from another Instructable.
You can learn to do this first step in this link: https://www.instructables.com/id/head-in-a-jar-prank/

After that, we’re going to add the arduino circuit to convert it into a candy dispenser.

To build the Jar Holder was necessary to make a wood structure to subject all the electronic and mechanical components used to run the candy dispenser.

The external structure holds the jar. Also there is a shelf to hold the electronic and the candy cavity pasted to the table.

The candy dispenser consists in a cavity where is possible to put different kind of sweets and the barrier that allows or not the falling of a single candy each time. The whole is made by wood and the barrier is connected to the servo to be moved when the sensor feels a hand near.

In this project we use the following components:

- Servo Motor x1: movement of the gate.

- Movement sensor x1: detection of hand to take a candy.

- LED's RGB x4: output of the sensor (informs the user about the correct use).

- Battery x1: energy to the servo running.

- Cocodriles: to connect the circuit.

- Resistors (220) x8

- Arduino 1