Incubator Project

Projects General Guidance
1

Hi, I'm new on this forum and to Arduino coding.
I had a few doubts regarding my Arduino project. I am building a cost effective incubator as a project. I have decided to use an Arduino Uno with two LM 35 sensors to check the temperature of the infant and the incubator itself.
I also want to display these temperatures on a single LCD while controlling a switch to the incubator's heater, which is controlled by a pre set temperature that will be included in the coding.

My doubts are :

  1. Is it possible to interface 2 LM 35 sensors with the Uno. If yes, a link to a tutorial will be of immense help.

  2. Will the Arduino Uno be able to handle 2 inputs and 2 outputs at the same time ?

  3. If there is need for an external supply, will batteries work ? (since i'm trying to make it as small as possible.)

Thanks in advance.

2

The UNO with an LCD shield (with buttons/rotary control) is quite capable of that.
You can have as many LM35s as there are analogue inputs.
Start with just the UNO and one LM35, and use the serial monitor to display the temp.
Google "Arduino LM35 temp sensor", and you get plenty of examples.
Then add a second LM35, and try to add that in the code.
This setup has a resolution of ~0.5 degreeC per digital step.
You might want a better "resolution" by using the 1.1volt A-ref.
When it all works, and you understand it, then it's time to think of adding the LCD.

Battery power is possible, but not a permanent solution.
Unless you want the infant to freeze or cook when the battery dies.
Leo..