If you’ve talked to me at all about computers, you know that I love these things. Or if you read my previous post about DV hotspots in Amateur Radio, you must have noticed that I mentioned a device called a Raspberry Pi. In the post I discussed the Pi Zero briefly. Today I just want to quickly go over what a Raspberry Pi is, and why you should have at least one if you want to play around with any technological concepts.
Pictured on the left is a model B+ of the original Raspberry Pi board, and on the right is the more recent Raspberry Pi 3 B board.
The Raspberry Pi is a credit card sized computer. It has a handful of ports – 4 USB, 1 Ethernet, 3.5mm Stereo, HDMI, Micro USB (for power), Micro SD card slot for storage, 2 ribbon cable slots on the board (1 for camera, and 1 for a display), as well as a 20 pin GPIO. They upgrade the memory on them between releases, and the Pi 3 is a lot more powerful than the original Pi was for sure, in addition they now have built in WiFi and Bluetooth where as before you had to get a USB device to have the capability. In addition, via the ribbon cable port you are able to convert it into the functioning touchscreen computer below.
What purpose does this serve really though? Why should you want one of these? There are a few things that can be done with these for sure – I have primarily used them in radio applications for running hotspots, and logging, however I am in the process of building a media server off of one as well (been a long process, just need to pull the trigger on some storage, and it’s ready), which will allow me to have the entirety of my music, photos, and movies stored on it, and will make it accessible from anywhere. Pretty neat, right? All off of a board that’s the size of a credit card. You can tie them in for home automation, security systems via the camera port, media center boxes, and any hardware tinkering you want to do, you can fiddle around with the GPIO – check out the people that have built robots and drones with these, they’re really cool. They’re a sandbox for technological play – pretty much any concept that you have you can probably fill in with one of these.
In addition to the Pi, there is the Pi Zero that I mentioned in a prior post. That is a board only slightly larger than the size of a stick of gum. It has 2 micro USB ports, one micro HDMI, a ribbon cable port for a camera, and an SD card slot. That is it. I don’t have any photos, but you can check them out here. This I haven’t really played around with too much, but it’s a slimmed down, bare bones version of the Pi, meant for you to be able to play around with for single uses.