MC HCK (pronounced McHack) is a tiny and cheap development board powered by Freescale K20 MCU (ARM Cortex M4) that can be easily programmed via USB. The board has been designed with KiCad, is fully open source hardware, and it’s supposed to cost as low as $5.
The only problem, or main advantage, depending on how you look at it, is that it’s not available for sale (yet), but instead you’ll need to make it yourself. The actual cost of doing so will be well over $5 (About $35), but the BoM cost is about $5, and you can make 5 boards for this price, or about $7 per board.
The detailed steps are explained on McHck blog, but they can summarized as follows:
- Order 10 PCB using the gerber files via services such as Seeedstudio or Iteadstudio
- Order 5 free samples of Freescale K20 MCU. Select MK20DX128VLF5 part, and add $5 for shipping.
- Order passive components: 100nf decoupling caps, 2.2μf regulator caps, 33Ω and 1kΩ resistors,LEDs, and buttons.
- Once you have your PCB, and all components, you’ll have to do some soldering.
You can now read the Getting Started Guide to learn how to install the toolchain, program and debug the board via USB, and more.
If you don’t feel like doing the board yourself, but would still like to play around will a fully assembled $5 board, Hackaday reports that “the McHck community will soon launch a crowdfunding campaign to send the 5th version of the board to all the hobbyists that may be interested”.