Low charge audible warning for 12V batteries – in DIY Kit

By Boris Landoni on October 2, 2023

This low-charge warning buzzer alerts you when your vehicle’s battery is low. It is designed for vehicles with 12V batteries, such as cars, campers, and vans. You can set it to sound when the voltage drops below a user-defined threshold using a trimmer that allows for adjustment.

Soldering is required for assembly. The kit comes with assembly instructions in English.

Circuit diagram

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About Boris Landoni

Boris Landoni is the technical manager of Open-Electronics.org. Skilled in the GSM field, embraces the Open Source philosophy and its projects are available to the community.

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