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 ...

Getting an analog reading is also pretty simple. A call to the read method returns the analog value: # Read the Adc Result = A0.read() Production considerations. We have looked at some very simple ...

If you’ve run out of I/O pins on a project and need a way to add user input you can find a slew of port expanders that work with various communications protocols like I2C and 1-Wire. But if y… ...