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Published January 23, 2022 © GPL3+

Distance Activated Night Light w/ Brightness Control

Using Ultrasonic Sensor + WS2812B LED Strip & 10K Potentiometer

BeginnerFull instructions provided684

Distance Activated Night Light w/ Brightness Control

Things used in this project

Hardware components

LED Strip, NeoPixel Digital RGB

WS2812B Addressable RGB LED Strip

Rotary potentiometer (generic)

10K Potentiometer

Arduino Nano Every

To Manage Everything.

Ultrasonic Sensor - HC-SR04 (Generic)

Breadboard (generic)

Jumper wires (generic)

Software apps and online services

Arduino IDE

Microsoft VS Code

PlatformIO IDE

Story

I've tried using an HC-SR501 PIR Motion Sensor for this project, but due to space constraints (Yes, I do have a small room), it's just not the right component to use because its shortest sensing distance is just 3 meters which is a little bit too much.

Every time I, or my dog move when trying to sleep, the Motion Sensor would trigger the light to turn on and that's just annoying.

So I opted to use a sensor that's not movement-reliant.

By using an Ultrasonic Sensor, the light would only turn on if I'm close to where I set it to.

I think this project can be used as an example on how effortless it is to merge or interface two or more components together and make them work according to our preference.

It is indeed the lazy way to do it.

But, for the purpose that it’s going to serve, I think it’s fine.

******************************************************************************

Helpful Links:

Analog Input Sample Code

Analog Write Sample Code

Analog In-Out Serial Sample Code

FastLED Github Library Basic Usage

Ultrasonic Sensor Github Library

******************************************************************************

Facebook

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Full Project Tutorial

https://youtube.com/@HeathenHacks

Code

Final Code

#include <Arduino.h> 
#include <Ultrasonic.h>
#include <FastLED.h>
#define NUM_LEDS 10
#define DATA_PIN 6

Ultrasonic ultrasonic1(3, 4); 
CRGB leds[NUM_LEDS];
int Pot = A0;
int PotVal = 0;
int OutVal = 0;

void setup()
{
  Serial.begin(9600);
  FastLED.addLeds<WS2812B, DATA_PIN, GRB>(leds, NUM_LEDS);
}

void loop()
{
  PotVal = analogRead(Pot);
  OutVal = map(PotVal, 0, 1023, 0, 255);

  if (ultrasonic1.read() <= 10)
  {
    fill_solid(leds, NUM_LEDS, CRGB::OrangeRed);
    analogWrite(NUM_LEDS, OutVal);
    FastLED.setBrightness(OutVal);
    FastLED.show();
    delay(5000);
  }
  else
  {
    FastLED.clear();
    FastLED.show();
  }

  delay(100);
}

Credits

HeathenHacks

24 projects • 57 followers

I don't know what I'm doing here.

Distance Activated Night Light w/ Brightness Control

Things used in this project

Hardware components

Software apps and online services

Story

Helpful Links:

Schematics

Schematic Diagram

Code

Final Code

Credits

HeathenHacks

Comments

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Distance Activated Night Light w/ Brightness Control

Distance Activated Night Light w/ Brightness Control

Things used in this project

Hardware components

Software apps and online services

Story

Helpful Links:

Social Media Links To Follow (I mean, if you want to):

Schematics

Schematic Diagram

Code

Final Code

Credits

HeathenHacks

Comments

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