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Light Sensor

$24.95

Detect ambient light with the Modern Robotics Light Sensor! Small changes are detectable in light and dark environments.

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SKU: 45-2015 Category:

Description

The Light Sensor detects the ambient light level using a phototransistor. The value returned is a quasi-logarithmic analog value that allows the Light Sensor to be used over at least four decades of light. This means that the Light Sensor can detect small changes in light and dark environments.

Sensor Type: Three Wire Analog Sensor

Dimensions: 32 x 32 x 12 millimeters

Mounting Holes: 24 x 24 millimeters

Power: 5 volts DC, 20 mA max.

Signal Logic Levels: Analog 0 – 5 volts

Additional information

Weight .0280 lbs
Dimensions 4 × 3.75 × .75 in

FTC SDK

Android Studio Example Program

Download the below program for an example of how to read this Analog sensor. The FTC SDK will supply a value from 0-5 representing a voltage.

In your configuration file, name an Analog Input “light” and name a Core Device Interface Module “Device Interface Module 1”

/*
Modern Robotics Analog Example
Created 7/25/2017 by Colton Mehlhoff of Modern Robotics using FTC SDK 3.10
Reuse permitted with credit where credit is due

The Modern Robotics Core Device Interface reads analog input
using a 10 bit value meaning the Android Phone reads a value from 0 to 1023.
The FTC SDK supplies a "voltage". The SDK is scaling this value of 0-1023 to 1-5 with decimal places.

Configuration:
Analog Input on Core Device Interface "light"
Core Device Interface named "Device Interface Module 1"

Support is available by emailing support@modernroboticsinc.com
*/

package org.firstinspires.ftc.teamcode;

import com.qualcomm.robotcore.eventloop.opmode.LinearOpMode;
import com.qualcomm.robotcore.eventloop.opmode.TeleOp;
import com.qualcomm.robotcore.hardware.AnalogInput;
import com.qualcomm.robotcore.hardware.DeviceInterfaceModule;


@TeleOp(name = "Analog Example", group = "MRI")
//@Disabled
public class MRI_Analog_Example extends LinearOpMode {

    //An Analog Input. In this example, we used a Light Sensor although it could be any analog sensor.
    AnalogInput MRLightSensor;

    //CDI. Using this, we can read any analog sensor on this CDI without creating an instance for each sensor.
    DeviceInterfaceModule cdi;

    @Override
    public void runOpMode() {
        telemetry.addData("Status", "Initialized");
        telemetry.update();

        //Link objects to configuration file
        MRLightSensor = hardwareMap.analogInput.get("light");
        cdi = hardwareMap.deviceInterfaceModule.get("Device Interface Module 1");

        waitForStart();

        while (opModeIsActive()) {

            //Read the light sensor using the Analog Input object
            telemetry.addData("light", MRLightSensor.getVoltage());

            //Read each Analog Port of the CDI. 0-7
            for (int i = 0; i < 8; i++) {
                telemetry.addData("Analog " + i, cdi.getAnalogInputVoltage(i));
            }
            telemetry.update();
        }
    }
}