If you are a beginner and would like to build your own power supply, you should consider making an isolated power supply, from both a safety and not blowing up your Arduino accidently point of view.
You would need to use a power supply that has a mains transformer in it. This would be pretty simple to make, but on th eother hand as has been mentioned you could buy a mains rated plug pack that has all the safety features built in.
For a home made one, you need a fuse, 120 -> 9v transformer, a diode bridge or just two diodes (depends on the transformer you buy), a capacitor and a voltage regulator 7805 or similar. That will make a basic power supply. The transformer needs to be rated at, at least 1.8VA .
Circuits with actual parts and part numbers can be made if you wish. There are many websites with basic linear power supply circuits.
If you are a beginner and would like to build your own power supply, you should consider making an isolated power supply, from both a safety and not blowing up your Arduino accidently point of view.
You would need to use a power supply that has a mains transformer in it. This would be pretty simple to make, but on th eother hand as has been mentioned you could buy a mains rated plug pack that has all the safety features built in.
For a home made one, you need a fuse, 120 -> 9v transformer, a diode bridge or just two diodes (depends on the transformer you buy), a capacitor and a voltage regulator 7805 or similar. That will make a basic power supply. The transformer needs to be rated at, at least 1.8VA .
Circuits with actual parts and part numbers can be made if you wish. There are many websites with basic linear power supply circuits.
