Arduino TEA5767 radio with analog meters for showing frequency and signal strength.
Project tutorial by Mirko Pavleski
In this tutorial, you will learn how to use a soil moisture sensor. Practical examples are also provided to help you master the code.
Control a solenoid/relay or whatever your locking system, and change the passcode by the keypad only, no program reupload.
Project tutorial by SurtrTech
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