Does the Arduino Board heat up?

Projects General Guidance
1

Hey,
I am working on a school project right now. The project involves a pressure sensor connected to an Arduino through Breadboard. There is a LCD connected with the Breadboard and Arduino as well. The pressure sensor takes the pressure from the surroundings and the results are displayed on the screen.

The Arduino Board I am using is Arduino UNO R3 Compatible Atmega328P Board.

These are the details of the pressure sensor:
Company Name: Mouser Electronics
Mouser P/N: 785-SSCDRRN005PD2A3
Description: DIP, Dual Rad Barbed Honeywell Board Mount Pressure Sensor

And the LCD model is 1602 16x2 Character LCD Display Module HD44780 Controller Blue/Green screen blacklight LCD1602 LCD monitor 1602 5V

I am going to connect the 12V power supply in parallel to the air pump and the Arduino Board. The Air pump includes a 12V Vacuum Pump used for air pumping and air extracting and a DC 12V solenoid valve. I searched similar circuits up online as well. Is there any chance of the Arduino Board heating up if it is connected in parallel to the power supply and air pump?

Thank you!

2

Yes. They get quite hot enough at 9v, 12v just make it worse.
Since you are sensitive to this, and need to reduce the voltage, you might as well put in a decent 5v regulator and sleep well at night. Only 5v is ever available at Arduino's output pins, no matter what the supply is, so I assume you are planning to use some control gear for the 12v apparatus, like switching transistors or something.

3

Hey,
Thank you so much for the prompt response. The power supply is 12 V DC so the air pump is safe. As per your advice, I am using a 5V regulator for the project and I found one online. Can you tell what each of the ports in the regulators mean so that I can easily connect it to the Arduino Board. I couldn't understand what the suffix EN means?

Thank you once again!

4

Hey,
Sorry I didn't attach the picture of the back side of the regulator for reference. It is attached with this post.

Thank you!

Screen Shot 2019-03-11 at 8.02.49 PM.png

5

I'm afraid I am not familiar with the device. I see that it has variable output, so I guess the EN controls that. Surely there is something simpler that you can find? And I bet that when you do it will be cheaper.

6

EN usually stands for Enable. You probably turn the output on and off by applying 5V to or grounding the EN input, respectively.

The data sheet for the module is your best source of information.

7

Hey,
Thank you for your replies. I checked the website i.e. Abra Electronics. The link for the component on the website is as follows:

There is no data sheet available for the component at the website. If possible, could you explain a bit more about how the connections for the enable part of the voltage regulator should be made? The enable port of the voltage regulator cannot be connected to both 5V and ground at the same time. Can we leave the port as it is and attach the input and output to their respective ports only?

Sorry for the inconvenience and thank you for the response.

8

You usually don't connect the EN pin of a buck converter (it has internal pull up),
unless you want to be able to turn it off (not needed here).
Connect it's 5volt output directly to the 5volt pin of the Arduino.

The link shows a buck/boost converter.
Since you're only dropping 12volt to 5volt, it's better to use a buck converter (higher efficiency).
Leo..

9

600 mA is somewhat stingey for Arduino, even though you are avoiding the onboard regulators. A 1 Amp is surely available and would be a better choice.