The Smallest single-board computers You can make magic easily with them.

Most steemit users are true cryptocurrency beleivers and most of them are Single board computers fans today im listing the best singel board computers you can affrod cheaper for less than 50$
WHAT THE HELL IS AN SBC ( SINGLE BOARD COMPUTER°

"A single-board computer (SBC) is a complete computer built on a single circuit board, with microprocessor(s), memory, input/output (I/O) and other features required of a functional computer. Single-board computers were made as demonstration or development systems, for educational systems, or for use as embedded computer controllers. Many types of home computer or portable computer integrated all their functions onto a single printed circuit board.
Unlike a desktop personal computer, single board computers often do not rely on expansion slots for peripheral functions or expansion. Some single-board computers are made to plug into a backplane for system expansion. Single board computers have been built using a wide range of microprocessors. Simple designs, such as built by computer hobbyists, often use static RAM and low-cost 8 or 16 bit processors. Other types, such as blade servers, include all the memory and processor performance of a server computer in a compact space-saving format."
-From Wikipedia
What Can we do with an SBC ?
a mini computer

a robot

a gameboy advance

a Server Cluster

Bitcoin mining or other crypto currency

1. The BeagleBone Black
   
   Boot linux instant and start developing using only one usb cable it can run debian ubuntu and android there are alot of developers out there with many ideas for it
   A 1 GHz processor, 512 MB of RAM, 4 GB of onboard storage, a 3D graphics accelerator, and a mini-HDMI port
   This SBC can be used to play some video games or for task automation even a robot controller

2. ODROID-C1+
   
   ODROID mentioned that the C1+ is the most powerful and low-cost single board computer available and they might be right you can't beat it on the price and it also runs many linux distros such as debian fedora and android
   it has a 1.5 GHz quad-core processor, a Mali GPU, 1 GB of RAM, gigabit ethernet, 5 USB ports, a microSD card slot, an HDMI port and an IR receiver and a small number of GPIO pins

3. Banana Pi
   
   Similar to the Raspberry Pi this little Fruit Board can run raspberry Pi dedicated distros such as raspbian and more
   it has 1 GHz quad-core processor, 1 GB RAM, HDMI port, gigabit ethernet port, SATA port, and 3 USB ports
   Banana Pi markets this board as a great introduction to building your own computers, and the versatility of the board certainly makes it a good option for beginners.

4.Orange Pi

It’s an open-source single-board computer. It can run Android 4.4 , Ubuntu, Debian, Rasberry Pi Image, it uses the AllWinner H3 SoC, and has 1GB DDR3 SDRAM
Orange Pi Plus is for anyone who wants to start creating with technology – not just consuming it. It's a simple, fun, useful tool that you can use to start taking control of the world around you.