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.
Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.
Step 1: Build the Head-in-a-jar
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.
Step 2: Build the Jar Holder
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.
Step 3: Build the Candy Dispenser
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.
Step 4: Electronic Components
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