Metal sorting machine with magnetic arm

Step

Description of a metal sorting robot arm

Costs

1

You need a minicomputer called Raspberry Pi – people all over the world use it because it is so cheap. You also get used ones for less than 20 €

10-20 €

2

You also need an old screen and a keyboard – you can take stuff from the rubbish dump - it just has to work

0-20 €

3

You need two small servo motors and some small cables to connect your RasPi with the motors

15-40 €

4

Fix motor one on a wooden plate and fix the second one above it – so you can turn left and right and go up and down

0 €

5

Now fix an aluminum arm on the top motor – we used glue and two small screws

0-1 €

6

Install an electromagnet at the end of the arm – you find tutorials how to build it on the internet

0 €

7

Energize the electro magnet by connecting + and - >> again you find many tutorials on the internet

0€

8

Connect the Raspberry Pi with the motor[1]

9

Write a program using Scratch to control the motors and the electromagnet – again you find tutorials on the internet – we want to provide an example on our website soon

0 €

10

Now it should work – you only have to work on the timing

0 €