How can i make a fingerprint reader to unlock a door? (Preferably under ÃÂ£20)?
I'm wanting to make a fingerprint scanner to go on a hidden door (made into a bookcase), the hiding of the scanner isn't a factor i'm worrying about at the moment - But i can't afford to pay out like £50 just for a scanner!
Or if you can think of any alternatives to this, that would be great too! (: