The Raspberry Pi is a full-featured Linux computer with relatively low power consumption that can fit in the palm of your hand. And it costs about $35. What’s special about the Raspberry Pi as a computer is that it also includes GPIO pins, which gives the Pi the ability to interact with the outside world through sensors, something that most computers can’t do without investing in additional hardware and software.
When your project expands beyond the capability of an Arduino and you need to access the capabilities of a full computer and the features of its operating system, the Raspberry Pi is an ideal choice for your project board. If you’re looking to buy a Raspberry Pi, there are many different models for sale. Here’s what we think you should buy (hint: the latest version):
The Raspberry Pi 3 (Model B) is a full-feature Linux computer that’s priced about $35. It has a 64-bit quadcore Cortex-A53 processor running at 1.2GHz, 1GB of memory, Ethernet, Wi-Fi and Bluetooth, 4 USB ports, an HDMI connection an audio connection and uses a micro SD card for storage. It also has GPIO pins you can use to interact with sensors, similar to an Arduino.
Raspberry Pi Zero: This version, priced at $5 — five dollars — has a single-core processor running at 1GHz with 512MB of memory. , 2 micro USB ports a mini HDMI port. It uses HDMI for audio and a micro SD card for storage. While it has no network connection, for another $5 ($10 total) you can upgrade to the Raspberry Pi Zero Wireless and get Wi-Fi and Bluetooth built in. Both are low-power devices The Zero without Wi-Fi has a power rating of only 160mA, and the wireless version’s rating is 180mA.
You can refer to many charts that compare the exact specifications of the different models of the Raspberry Pi, so we won’t repeat the information here. We don’t think there’s much of a reason to be interested in the earlier versions of the Pi. The Zero gives you the lowest power consumption that you could get from an early model Pi. Older models might save you $10, but they will be slower than what’s available now.
Since the Pi was introduced, there are a variety of competitor products and Pi clones available. It will be tough, however, for any competitor or clone to compete with the Pi because of the massive user community that exists around it. In September 2016, the Raspberry Pi Foundation sold its 10 millionth Raspberry Pi board.