Here I show you how to make an electromagnet from rubbish.
Besides a power source you only need 2 things.
What you need:
Power Source ( USB TTL Module 5V OUT)
Ferrous Thing ( Screwdriver)
Copper Coil from Electro Rubbish
- also used but not necessary:
Step 2: Unwind Copper Coil Adn Rewind
Unwind copper coil, rewind it on the screwdriver and connect everything as show on schematics.
Step 3: Finish
Now you have a simple electromagnet.
At 5 volts, magnetism is beginning to work noticable.