At the time of writing, there are five models of the Raspberry Pi: A, A+, B, B+, and since February 2015 the new model Pi 2 model B. Here is a comparison between the versions A+ and 2 B.
|
Model A+ |
Model 2 B |
|---|---|
|
Costs ~$25 |
Costs ~$35 |
|
One USB port |
Four USB ports |
|
No Ethernet |
Standard Ethernet connection |
|
256 MB RAM |
1 GB RAM |
The model A+ is cheaper, but only has one USB port and no Ethernet connection. This may not be a problem. If you connect a powered USB hub to the Model A+ and then employ a USB-to-WiFi adapter, you have all the networking capabilities of Model B+. One main difference between the two models is the amount of RAM. Model A+ has 256 MB of RAM. The model B+ has a 512 MB RAM and 2 B has a 1 GB RAM. This is not upgradable on either model.
All Raspberry Pi microcomputers come with a slot for an SD memory card, audio out-jack, video ports for RCA and HDMI, and a row of pins for general purpose input and output. There are two additional connectors for...