DIY Alarm Bike Lock

If you don’t have a safe place to lock down your bike, like most of us here in NYC, this might be a great make for you!

via GreatScottLab

In this project I will be showing you how to create a simple shock activated alarm bike lock. Like the name implies, it does create an alarm sound when your bike is being moved around with permission. Along the way we will learn a bit about piezoelectric discs, amplifiers and a simple logic circuit. Let’s get started!

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