I have a project that I am working on. I want to build a small dashboard that displays several readings from my engine. This is in a classic Mustang, so there is no OBDII or such to use. What I am monitoring is RPM (via this little module here), vacuum via a 0-5V analog sensor, and air/fuel via a P…

iOS Bluetooth Automotive Dashboard via Uno - 12V on/off signal - #10 by system - General Guidance

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