Which Arduino should I buy

Hey Guys, I‘m pretty new here

I do have a new project in mind but I need some help in choosing a suitable Arduino micro controller.

The Ardunio should be able to handle following tasks simultaneously:

  • operate 2 relays

  • a timer with a small sound module ( just a “peeper” ,an acoustic signal)

  • a waterproof thermal sensor up to 100 degrees Celsius

  • a display

  • a keyboard

Which arduino is your eyes the right one for my job ?

Thank you for your help

Tobias

Hi,

The most-common "UNO" would be fine for this application.

Here is a reference with many details:

http://arduino-info.wikispaces.com/QuickRef

There are variations on the UNO as you will see there..

DISCLAIMER: Mentioned stuff from my own shop...

Your choice of display will factor heavily into it.

What kind of keyboard?

What kind of display?

Your requirements on those two fronts are key. Interfacing a computer keyboard to an Arduino is difficult and expensive (as you need a USB host shield/module). A small B&W OLED display or character LCD demands very little from the controlling hardware, while a color TFT LCD is awkward to drive from most Arduinos due to the comparatively large amount of data involved.

If you need a good display and a computer keyboard, you may be looking more at a raspberry pi project - as those can natively interface with keyboards and fullsized displays - at the price of being less ideal for interacting directly with other devices.

If a simple keypad and character LCD are appropriate, almost any Arduino will work - Uno/Nano/Pro Mini would be the default choice. Uno is bulkier and more costly, but somewhat easier to work with (particularly if you prefer shields over modules); nano and pro mini are smaller and cheaper (but code-compatible) versions.