This simple project demonstrates how to use the Arduino Uno to convert an analog signal into a digital value and display the result on the Arduino IDE's serial monitor. The analog input is generated ...

It starts by using Vcc (~5 V) as the reference for the ADC. If the reading is less than 1.1 V, the ADC reference is switched to the 1.1-V internal reference. This reference is continued to be used ...

The Arduino measures the rectified analog value to an integer, and applies the appropriate sign from the supplied bit value. The second circuit takes a variation on the same technique but with two ...

Prestissimo Uno+ Arduino dev board with extra I2C UART SPI ADC IO and PWM channels. 2:24 pm November 5, 2018 By Julian Horsey.