Building an Arduino controlled OLED display VU meter, Part 5.
This part will teach you which how to control the voltage reference and adjust the range of voltages for your diplay.
Commands:
analogReference(DEFAULT): Reference voltage is 5v, measuring 0 ~ 5v.
analogReference(INTERNAL): Reference voltage is 1.1v, measuring 0 ~ 1.1v.
analogReference(EXTERNAL): Reference voltage is connected externally to the (A)REF pin. Never forget to give a voltage if you issue that command otherwise you might fry your arduino.
Негізгі бет OLED VU METER with Arduino - Part 5 - Voltage Reference
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