How to Create a Fingerprint Detector (simple)

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About: A simple person who loves technology and making things ;), gamer ... and Silent Assassin.

You need to:

1 - pencil

2 - a knife

3 - paper

Step 1: Step2

.Then stripping the pencil of wood as in the picture

Step 2: Step3

Grind the lead and put it in a bowl.

Step 3: Finished

Put the powder on the place of the fingerprint , then remove it and you will see ...

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