Arduino Calibration

Posted on Feb 7, 2014

This example demonstrates one techinque for calibrating sensor input. The Arduino takes sensor readings for five seconds during the startup, and tracks the highest and lowest values it gets. These sensor readings during the first five seconds of the sketch execution define the minimum and maximum of expected values for the readings taken during th

Arduino Calibration
Click here to download the full size of the above Circuit.

e loop. Connect an LED to digital pin 9 with a 220 ohm current limiting resistor. Connect a photocell to 5V and then to analog pin 0 with a 10K ohm resistor as a reference to ground. These may seem backwards. Initially, you set the minimum high and read for anything lower than that, saving it as the new minimum. Likewise, you set the maximum low and read for anything higher as the new maximum, like so:

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    Low-Battery Detector
    6W Warble-Tone Siren
    A Compact Co-Planar Waveguide-Fed Zeroth-Order Resonant Antenna
    30 watt audio amplifier
    How I built a shortwave Armstrong FET regenerative receiver
    Unipolar Stepper Motor Control Circuit
    Direct coupling audio power amplifier configuration A741 circuit
    Fluorescent light circuits at low temperature and pressure