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Understanding Ignition Based 12v Power

This diagram was sourced from another project.

PreviousUnderstanding Arduino Communication over USBNextSetting up the Arduino MEGA

Last updated 6 months ago

Info: Please use your car's manual since the ignition wire can depend on the car brand and model.

Power is sourced from a constant 12V wire which is controlled by a relay that controls system power and Arduino power that is regulated by multiple buck converters. These are all controlled by the 12V ignition wire to tell when the car is on or off.

Hardware Needed

  • Buck Converter (XL4015 DC-DC)

  • Buck Converter for Arduino and Computer (LM 2596s DC-DC)

📎
Power Circuit Diagram