Arduino Mystery Box

Learn how to create your own Mystery Box, that will open only by interacting with the three inputs.

Dragos

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Description

Hello!

This is a tutorial for beginners, that will help you create a "Mystery Box" that will only open after using all three inputs (HC-SR04 Ultrasound sensor, Photoresistor, and an NTC Thermistor).

Details

This is a fun 4-step Mystery Box that you make at home, to entertain your friends or family.

You would have to interact with the three inputs of the Arduino in order to open the lock.

The SG90 Servo will only open when all 4 steps are completed.

Files

20170507_220539.jpg Step 1, after powering the box. JPEG Image - 3.31 MB - 05/11/2017 at 13:36		Preview

20170507_223536.jpg The inside of the box, with the SG90 Servomotor and complete wiring. JPEG Image - 3.01 MB - 05/11/2017 at 13:36		Preview

20170507_220847.jpg Another close-up of the inside of the box. JPEG Image - 2.82 MB - 05/11/2017 at 13:36		Preview

20170507_223159.jpg Right side of the box with HC-SR04 Ultrasonic Range sensor and NTC Thermistor 10kohm. JPEG Image - 2.35 MB - 05/11/2017 at 13:36		Preview

20170507_223108.jpg Left side of the box, with the PhotoResistor and the Power supply + Arduino USB port. JPEG Image - 2.73 MB - 05/11/2017 at 13:36		Preview

View all 9 files

Components

1 × Arduino UNO
1 × HC-SR04 Ultrasonic Range Sensor.
1 × Photo resistor
1 × NTC Thermistor 10kohm
1 × Breadboard (generic)

View all 11 components

Build Instructions

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1

Step 1

Hello!
This is a tutorial for beginners, that will help you create a "Mystery Box" that will only open after using all three inputs (HC-SR04 Ultrasound sensor, Photoresistor, and an NTC Thermistor).
2

Step 2

After gathering all needed items, you can wire them like I did in this Fritzing Diagram:
For the NTC Thermistor I used a 10k resistor.
For the Photoresistor I used a 5k resistor.
You can use regular 220 ohm resistors for the LEDs.
3

Step 3

You can position the "sensors" how you'd like it the most in the box, but for me, this was the most easy and effective way.