Developing a fake currency detector which can be low cost and kept in the wallet of a person
Hello All, lets make a build group for developing a low cost and simple fake currency detector which can be put in your wallet like your credit card or so and used whenever you have suspicion of fake currency please all join in for all those interested
Put a UV LED in an Asylum “Learn to Solder” Badge.
For good measure, put a second IR LED on the Badge. It’ll show up in photos.
And the third can be a White LED to use as an emergency torch.