WTPA2 Prototype B PCBs Arrive
So the boards got here for the next (and hopefully last) prototype of the WTPA2.
Some exciting changes from the last proto — I not only fixed some dumb hardware bugs and changed some layouts to make more sense, but I added the pulse shaping circuit from the last post and…
Added a Micro SD card interface!
Again I really owe Olivier over at Mutable Instruments for this, since he once again shamed me out of my sloven embedded ways. Basically I didn’t want to have to deal with the SD spec (I did a little coding on MMC interfaces for the toy world and it sucked) and so I’d made the earlier daughterboard using a cheap SST flash IC. The flash IC was easy to deal with, but was admittedly a cop out. Olivier clowned me about this until I was embarrassed enough to change my ways. Users like removable memory, and a micro SD card provides 2GB of memory for about a dollar (as opposed to my 8MB before). So I sucked it up and made this board. It will be available for sale as a daughterboard (it’s deeply SMT) although I may swear a lot getting the new interface done.
Here’s the main board populated. And here’s the new Jack PCB added on: