Arduino Sensors

= TM1637 = http://tronixstuff.com/2014/12/01/tutorial-using-ds1307-and-ds3231-real-time-clock-modules-with-arduino/
 * Connecting TM1637 4x7 Segment Display to Arduino

= DS3231 =


 * Setting Time for first usage

http://www.raspberrypi-spy.co.uk/2015/05/adding-a-ds3231-real-time-clock-to-the-raspberry-pi/ http://woodsgood.ca/projects/2014/10/21/the-right-rtc-battery/
 * DS3231 RTC Clock Using Non-Rechargeable Batteries

http://www.instructables.com/id/Real-time-clock-using-DS3231-EASY/step3/The-code/
 * DS3231 RTC Clock with Display

http://www.rinkydinkelectronics.com/library.php?id=73
 * Library

= HC-SR04 = https://codebender.cc/sketch:212841#Distance%20Sensor%20TM1637.ino
 * HC-SR04 UltraSonic Distance Sensor with TM1637 Display

http://playground.arduino.cc/Code/NewPing
 * Library

= MQ-2 Gas Sensor =

If you're using the sensor for the first time, it's a good practice to leave it powered on for about 24 hours before getting a good read. Don't skip this step. then comes the calibration process. just calibrate it to get about 100-150 from analogRead in a good air condition. normal air returns ~100-150 alcohol returns ~700 lighter gas returns ~750+
 * MQ-135

= DS18B20 = http://www.tweaking4all.com/hardware/arduino/arduino-ds18b20-temperature-sensor/

= JHD162A LCD =

https://www.rastating.com/using-a-jhd162a-lcd-screen-with-an-arduino-uno/ http://www.circuitstoday.com/interfacing-lcd-to-arduino

Pin 1 to GND Pin 2 to 5v Pin 3 to center pin of 10k ohm Pot(103), One leg to +VCC & other to GND Pin 4 to Arduino pin 12 Pin 5 to GND Pin 6 to Arduino pin 11 Pin 11 to Arduino pin 5 Pin 12 to Arduino pin 4 Pin 13 to Arduino pin 3 Pin 14 to Arduino pin 2 Pin 15 to 5v through a 220 ohm resistor Pin 16 to GND

= PIR Sensor =

http://www.instructables.com/id/Arduino-Basics-PIR-Sensor/?ALLSTEPS