A practical build log, complete wiring guide, calibration notes, and flicker-free display sketch The MG811 is an interesting solid-electrolyte carbon-dioxide sensor, but it is not a simple “connect analog output to Arduino A0 and read percentage” device. During this project, we learned that the sensor needs a dedicated heater supply, […]
sensor
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Items Needed: Code: #include "LCD.h"#include <LiquidCrystal_I2C.h>#define I2C_ADDR 0x27 // <<----- Add your address here. Find it from I2C Scanner#define BACKLIGHT_PIN 3#define En_pin 2#define Rw_pin 1#define Rs_pin 0#define D4_pin 4#define D5_pin 5#define D6_pin 6#define D7_pin 7LiquidCrystal_I2C lcd(I2C_ADDR,En_pin,Rw_pin,Rs_pin,D4_pin,D5_pin,D6_pin,D7_pin);void setup() { // initialize serial communication at 9600 bits per second: Serial.begin(9600); lcd.begin(20,4); lcd.setBacklightPin(BACKLIGHT_PIN,POSITIVE); […]
DHT temperature and humidity sensors, are very basic and slow, but are great for hobbyists who want to do some basic data logging. Each DHT is made of two parts: Capacitive Humidity Sensor and Thermistor. There is also a very basic chip inside that does some analog to digital conversion […]
In this tutorial, we will show you how to build a low cost thermometer, using Arduino & DS18B20 waterproof version (Digital Temperature Sensor) Step 1: Items you need to have Arduino UNO (or other Arduino Models) DS18B20 Waterproof Resistor 4.7KOhm (Preferably 1/2Watt). You can check the Watt availability for 4.7KOhm […]
Step 1: Items you need to buy 1x Arduino UNO 1x Color Sensor 1x Breadboard 1x RGB Led 3x Resistors – 220E Step 2: Connections Connect the following pins together properly: Color Sensor: S0 <-> PIN 3 S1 <-> PIN 4 S2 <-> PIN 5 S3 <-> PIN 6 Out […]
This Sensor KY-037 is easy to use, cheap and can be used in different applications. It has two outputs: AO, analog output, real-time output voltage signal of the microphone. DO, when the sound intensity reaches a certain threshold, the output high and low signal. The threshold-sensitivity can be adjusted […]