Hello readers in this instructable i will show you how to make arduino piggy bank

How it Works?

when u bring coin near the piggy bank the coin slot opens for sometime in that time duration the coin can be inserted which will be closed automatically ,this is an awesome science project idea for school students

Step 1: Video Tutorial

Hate reading?

watch this simple video tutorial

https://youtu.be/wedW3inIizQ

Step 2: Materials

Mini Breadboard
Ultrasonic Sensor
Arduino mini
Jumper Wires
Cardboard Box
Micro Servo

Step 3: Circuit Diagram

The circuit is made as per the image shown above

Step 4: Programming

Connect usb to laptop
upload the code

Step 5: Finishing Up

Test the working of micro servo
connect everything to the box
attach the battery(i have placed outside so it can be easily replaced)
Micro servo is attached with piece of cardboard which is used to open and close coin slot is hot glued to cardboard
Bring your hands near sensor and start saving money

https://youtu.be/wedW3inIizQ Watch this awesome working of project