The Raspberry Pi® is a single-board computer developed in the UK by the Raspberry Pi Foundation with the intention of stimulating the teaching of basic computer science in schools. The Raspberry Pi is a credit-card sized computer that plugs into your TV and a keyboard. It’s a capable little PC which can be used for many of the things that your desktop PC does, like spreadsheets, word-processing and games. It also plays high-definition video.
The original design is based around a Broadcom BCM2835 SoC, which includes an ARM1176JZF-S 700 MHz processor, VideoCore IV GPU, and 128 or 256 Megabytes of RAM, Revision B came with 512MB memory.
The B+ introduced:
- 4 USB ports
- 40 GPIO pins
The Raspberry Pi V2 gave the follwing new specs:
- A 900MHz quad-core ARM Cortex-A7 CPU
- 1GB RAM
With the introduction of the Raspberry Pi v3 the following changed:
- A 1.2GHz 64-bit quad-core ARMv8 CPU
- 802.11n Wireless LAN
- Bluetooth 4.1
- Bluetooth Low Energy (BLE)