EfiHacks Misc Pics
efiHacks Gallery of some Development Highlights pics
We will try to add more as we get to overcome some more obstacles :)
So the story goes
Well, we start right now with rework pics of the 1st efiO2Meter development boards. We know that the bluetooth device runs on 3.3 V and the efiO2Meter on 5 V, but somehow we missed it in the schematics ... so you glue it on afterwards and potentially fry a few bt-modules in the process of discovery ... what can we say other than we're only human with lots of experiences.
By the way, the definition of experience : the amount of experience is proportionally equal to the amount of previous fu%*-ups :) ... ergo ... we're very experienced :) :) :)
Also we are not into rocket science, regular science seems sometimes challenging enough :)
efiO2Meter Board Top View
Not much rework to show ... the tentacles, green wires are for loading the development firmware via spi-bus ... no worries, no longer on production boards.
efiO2Meter Board Bottom View
This took quite some time ... those 603 size resistors, like coarse ground peppercorns (not the ones on the bt-module ... they're even smaller), are 1.6 mm x 0.8 mm and 2 mm spacing headers.
The bluetooth module on stilts, for debug de-solder and exchange reasons.
efiO2Meter Comm. Distribution Concept Drawing
Conceptual schematic to figure out the signal flow and voltage interface levels.
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