Find you’re running out of memory and paying for more expensive chips just to plug this feature gap? Many of the upper offering of chips have the option of adding SRAM thanks to an on-chip hardware feature, but if you don’t have that this 512k SRAM add-on board can be used with any chip that has 13 extra I/O pins available.

That use of pins may sound crippling if you usually use low pin count chips. But thanks to a write protected state option with the memory chips, nine of those thirteen pins can serve a dual use when not reading or writing from the memory. Speaking of, the address scheme is designed to access the memory in 32-bit blocks but individual bytes are accessible too if need be. [Wardy] has been testing his design using a Propeller chip running at 75 MHz so we know it’s built for speed, but he also mentions there’s no minimum clock speed for the board to function either. He used the Open Hardware guidelines when sharing his work, and if you want one for yourself you could always give the DorkBot PDX service he used for the prototypes to get your own boards too.

[via Dangerous Prototypes]