Voltage Based Theromometer and Sensor Based Humidity Reader

Inspiration

We were trying to grow Guiana Chestnut and Cacti in our home. But these plants can be sensitive to humidity, especially in the wintertime. Since the thermostat was outside it would not tell us the relative temperature and humidity in the room, especially since it changed by the humidifier. So I decided to make this for a better estimate.

What it does

It is connected to an LCD, so the information can be just read off the screen for convenience. I used a DHT-11 Sensor to tell the humidity, it also can tell the temperature but can only do it by integers. So would only know if its 25 or 26 degrees nothing in the middle. So I decided to use a thermoresistor, which is sensitive to the temperature around it and effects the voltage accordingly. This led to me hooking that up to the Arduino as well, and measuring the voltage difference as the temperature rose, for accuracy up to 2 decimal places.

How I built it

Build using Arduino, LCD panel, DHT-11 sensor, and a 10k thermoresistor.

Purpose

Just a cool little project to meet a small inconvenience, also not something I will have to tweak again.

Built With

• arduino
• dht-11
• lcd