I found a bunch of Arduinos (seemingly), but I can't identify the type.
I first thought of a Micro, but the chip is a MEGA328PAU and the Micro should have a MEGA32U4 instead:
I know it's also not a Nano, because the Nano is a bit longer:
Next, I looked up the List of Board Specs. Based on the chip, the following models remain:
- Lilypad, can easily be excluded due to its shape
- Lilypad SimpleSnap, can easily be excluded due to its shape
- Uno, can easily be excluded due to its size
- Ethernet, can easily be excluded, because of the Ethernet port
- Pro Mini
So I am left with Mini, Pro Mini and Pro. The back of the board is not very helpful, since it IMHO misses the markers in the silk sceen:
It definitely looks like the Pro Mini from Arduino Store, but the Arduino store seems not to offer the Mini and Pro, so I don't have a comparison.
What type of Arduino is this? And, if possible, do you have a visual comparison of the three remaining types?