CD4017 code lock with wrong code detection

Published: 28 February 2021
on channel: FriendlyWire

35,661

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Learn how to build an advanced six-digit code lock with built-in wrong code detection, using the CD4017 decimal counter, the CD4081 AND gate IC, and the NE555 timer. In this project we will go through the basics of the schematic and build it together, step by step. Let me know if you have any questions in the comments, and I will do my best to get back to you. Thanks for tuning in!

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Timestamps:

00:00 Introduction
00:44 What you need
02:01 Code lock schematic & explanation
10:19 Building the code lock
18:02 Finished code lock
18:25 How many combinations are there?
18:48 Final thoughts

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