An STM32 processor powers this PC

This 32-bit computer is a project [Bogdan Marinescu] built as a contest entry. Sadly he didn’t win, but he did do an excellent job of documenting the build. Having seen several other home built PC projects we’re familiar with the challenges that go into such a thing, and he found some great solutions to each of them.

He started with an STM32F103ZET6 chip. This is an ARM Cortex-M3 processor which brings a lot of power to the playing field. That being said, generating a VGA signal would pretty much zap the usefulness of the chip for other processes so he offloaded that work on a separate Propeller chip. A microSD card serves as storage for the machine, which runs eLua (embedded Lua programming language). There is 1 MB of external RAM and a PS/2 port for keyboard interface. The system is networked thanks to an ENC28J60 Ethernet controller. Don’t miss the video after the break where you can see several demos running on the system.

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Hacked ARM dev board gives you two for the price of one!

[Matt Evans] took a closer look at the popular (and cheap) STM32F0 Discovery development board and realized he could get a second board out of the deal.

The Discovery board is designed to advertise ST Microntroller’s STM32F0 microchip; which with 8k RAM, 64K Flash, a bunch of peripherals,  48MHz clock, and a low price is a great chip. Though, they needed a way to program the STM32F0. To do this they added a second, more powerful, chip to the board as an interface. The STM32F103, with 20k RAM, 64K flash, and a 72MHz clock speed. [Matt] summoned genius, and simply sawed the board in half using a hacksaw.

Of course the caveat to all this is that you need a working Discovery board, or at least a working ST-LINK programmer, at the end of the day, to get any use out of your creation. Since the boards are so cheap though, it shouldn’t be a problem to buy two.