user63502: This is my first venture into Arduino. I am unsure which one to use even for this. As this will be a dedicated unit, and size is a small priority, the smaller the better.
Here is more info on the scheme I am looking for.
Switch 1 on turns on LED groups 1 and 2 
Switch 2 on turns on LED groups 3, 4, 5, 6, 7 and 8 
Switch 3 on turns on 1 for say 500 ms, then turns 1 off, turns on 3 for 500 ms, then turns off 3, then turns on 5 for 500 ms, then turns off 5, turns on 7 for 500 ms, then turns off 7, then loops back and turns on 1 repeating the cycle. 
Switch 4 on turns on 2 for say 500 ms, then turns 2 off, turns on 4 for 500 ms, then turns off 4, then turns on 6 for 500 ms, then turns off 6, turns on 8 for 500 ms, then turns off 8, then loops back and turns on 2 repeating the cycle.
Will I need an Arduino uno, nano or micro? 
I am hoping this will be an easy to do project in order to learn the world of Arduino

user62838: Micheal well easy solution is to use arduino nano as its bread board friendly and easy as it comes with the arduino IDE installed, well if size is what you are looking for then digispark attiny 85 can also do the task and its size is almost equal to a coin but for that youll need to install it in the arduino IDE which is a bit difficult.
if you need any help with attiny 85 you can come here

user63451: First of all, you need to have an overview over the whole project because you need to know what components you are going to use, how many digital/analog pins do you need, then check the official Arduino website to see if the board fulfills your needs.
If there is no special need, like more EEPROM or more analog inputs, almost most of the board will work for you (because most of them have the same microcontroller: ATMEGA328P), so it is up to what form factor you prefer more.
Personally, I would like to go with the Micro board because it has microusb connector, it is breadboard friendly (which is a big plus when you are prototyping) and it can be recognised as a mouse or keyboard.

63502: <p>This is my first venture into Arduino. I am unsure which one to use even for this. As this will be a dedicated unit, and size is a small priority, the smaller the better.</p>

<p>Here is more info on the scheme I am looking for.</p>

<p>Switch 1 on turns on LED groups 1 and 2 </p>

<p>Switch 2 on turns on LED groups 3, 4, 5, 6, 7 and 8 </p>

<p>Switch 3 on turns on 1 for say 500 ms, then turns 1 off, turns on 3 for 500 ms, then turns off 3, then turns on 5 for 500 ms, then turns off 5, turns on 7 for 500 ms, then turns off 7, then loops back and turns on 1 repeating the cycle. </p>

<p>Switch 4 on turns on 2 for say 500 ms, then turns 2 off, turns on 4 for 500 ms, then turns off 4, then turns on 6 for 500 ms, then turns off 6, turns on 8 for 500 ms, then turns off 8, then loops back and turns on 2 repeating the cycle.</p>

<p>Will I need an Arduino uno, nano or micro? 
I am hoping this will be an easy to do project in order to learn the world of Arduino</p>
 62838: <p>Micheal well easy solution is to use arduino nano as its bread board friendly and easy as it comes with the arduino IDE installed, well if size is what you are looking for then digispark attiny 85 can also do the task and its size is almost equal to a coin but for that youll need to install it in the arduino IDE which is a bit difficult.
if you need any help with attiny 85 you can come here</p>
 63451: <p>First of all, you need to have an overview over the whole project because you need to know what components you are going to use, how many digital/analog pins do you need, then check the official Arduino website to see if the board fulfills your needs.</p>

<p>If there is no special need, like more EEPROM or more analog inputs, almost most of the board will work for you (because most of them have the same microcontroller: ATMEGA328P), so it is up to what form factor you prefer more.</p>

<p>Personally, I would like to go with the Micro board because it has microusb connector, it is breadboard friendly (which is a big plus when you are prototyping) and it can be recognised as a mouse or keyboard.</p>
