Humidity sensor with led alarm | Arduino project

This page contains Arduino Humidity sensor with led alarm source code. This project is good for someone who wants to make a humidity meter or hygrometer with led alarm if humidity and temperature over a threshold. It's easy to make and doesn't require an external power supply, just use power from an Arduino UNO R3 board (USB power compatible with this project).

Electronic components list:
1 x Arduino Uno R3
1x 20 x4 I2C LCD display
1 x AM 2320 humidity/temp sensor
1 x 5 mm led ( 2 x if you plan to use led for pin 13 instead built-in led)
1 x 1000 ohms resistor ( 2 x if you plan to use led for pin 13 instead built-in led)
Any USB power adapter, 500 mA current at least.

Here is the Arduino code:
AM 2320 library https://github.com/hibikiledo/AM2320
LCD display i2c library https://github.com/fdebrabander/Arduino-LiquidCrystal-I2C-library


#include <Wire.h>
#include <AM2320.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x3F, 20, 4);
AM2320 th;
int led2 = 12;
vo…

How to remove scratches from your eyeglasses (hard core version) no cut scene!!!!

I saw many ppl ask before and after pictures in my previous "how to remove scratches from eyeglasses" video, so I decided to upload no doubt and clear method.

The eyeglasses lens I used in this video was severely full of scratches because I wipe multicoat with sand paper so you can see the progress very clearly.

This method not just for eyeglasses but good for another plastic material too.

You can use any soft car wax in the market to rub your eyeglasses but water is the key to making it done.
All you need is
-soft car wax
-microfiber cloth
-water
-time.

I also saw people comment that this method not working so I will tell the secret.(... patience is the key to success...)


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