In order to use the Arduino analog inputs to read voltages above 5 volt (actually above V REF, see here for more details), we need to design a voltage divider to divide the large voltage into a ...

Little Bird Electronics posted an article about using an analog voltage reference with Arduino. This is a tool available when using an analog-to-digital converter. By setting up either an internal ...

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He built transistor and voltage divider circuits to act as level converters. The programming software bit bangs the pins with a write time of less than eight seconds per 1k words of program data.