I´m not trying to bash anyone or anything here. Just curious.
Like the topics say.
Why use the "huge" Uno (compared to the Nano).
When the Nano uses the same microcontroller, same number of pins.
It´s basicly the same card but 25% of the Uno size...
Nano also have shields.
I´m missing something here?
Kind regards:
Istvan
It's a nice big board that you can hold easily without grabbing it by the connection. And if you're afraid of wiring, no problem, you can get shields of all description for it
The official (and faithful clones) also have the 16u2 serial adapter which can be reprogramed (i've seen a pretty cool system that used it as a USB midi device or something), but Arduino never provided much in the way of resources to do this, so very few people did this.
There are nano-shields, but not nearly as many. People generally don't use shields much as they get more used to working with Arduino - the shields are not as flexible as wiring up modules (or doing custom boards) - shields also cost 2-5 times what comparable modules cost.
The Uno is by no means the most popular Arduino board - it's the most newbie-friendly, and most people got one of them before moving on to other boards, like the nano, pro mini (has advantage of taking usb serial adapter off the board, enabling lower power consumption, especially if you pull the LED and regulator off) or "standalone arduino" built from parts.
Yeah, sounds about right. 
I think the Nano is somewhere in between.
It´s quite smal and one can use the USB for fast and easy programuploading while use it as a power supply. (With a USB phonecharger for example).
That´s how I´m going o supply my Nanos whn they arrive.
Take it a step further - why use a Nano when a Promini will do the same? Plug on an FTDI Basic for code download/debug, remove when done for an embedded application.
You can also pull the microcontroller off of an Uno board (it's in a "DIP" socket), and replace it, or more it into a separate project by itself, and the uno connectors are more friendly to "plug a wire/component lead into the connector" type projects.
Hmm, I've never seen a Nano shield (except for the nano terminal adaptor that provides screw connections for the pins.). Examples please (not home-made).
sterretje:
Hmm, I've never seen a Nano shield (except for the nano terminal adaptor that provides screw connections for the pins.). Examples please (not home-made).
Agree with you. That's why there are extreme more articles/tutorials in the internet for UNO than NANO. We should save our time for improving our app and code based on common devices instead of wasting so much time for making the same devices with the same functions.
CrossRoads:
Take it a step further - why use a Nano when a Promini will do the same? Plug on an FTDI Basic for code download/debug, remove when done for an embedded application.
Well, I thought the Nanos dimensions are:
1.7 in x 0.7 in x 0.55 in (43 mm x 17.8 mm x 14 mm)
And the pro minis dimensions (with pins for FTID connection)
1.54 in x 0.75 in x 0.55 in (39 mm x 19 mm x 14 mm)
I can live with those 3 mm extras to have a "proper and easy way" to program and debugging.
sterretje:
Hmm, I've never seen a Nano shield (except for the nano terminal adaptor that provides screw connections for the pins.). Examples please (not home-made).
Well, Ethernet shield:
XBee addon:
Thanks, never seen them before. But as I only have Unos, I also did not look for them
www.gravitech.us makes a bunch of Nano shields.
Also, a "real" (Gravitech) Arduino Nano has always been pretty substantially overpriced.
