Computing stuff tied to the physical world

Interface Woes

In Uncategorized on Nov 25, 2008 at 00:59

Ouch. It looks like there are two different Arduino Mini Pro’s around – a 5V @ 16 MHz and a 3.3V @ 8 MHz version. I thought I had the latter, but a quick check tells me otherwise. Which is no good when you’re trying to hook up 3.3V modules that do not tolerate 5V levels!

Oh well, just order the right one and wait for it to arrive…

Meanwhile, here’s another kind of impedance mismatch:


The obnoxious 2 mm vs. 2.54 mm pinout. Yuck.