When we assume...

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1

My "Barnduino" is going from "alpha" (read breadboard) to "beta" (read prototyping board)

It's built on 2 boards that kinda fit together like Arduino shields.
The bottom one is a 328P @16Mhz.
Got it built, works fine, flashes D13 great!

The top board is where the XBee lives, along with status LEDS.
It has it's own 3V regulator, an LD33V.

I just soldered it onto the board, applied power, nothing happened, except it got "warmish".

After checking for dry joints, solder bridges, using my shiny new DSO Quad to see if it was oscillating,

I had a vague thought,

"I can't be a different pin out can it?"

Yep, sure 'nuff it is!

I did a bit of de-soldering, re-soldering and now she's a' workin' good!

the message here is a simple one,

Don't assume!

LOL

:slight_smile:

2

Gotcha, some are IN/GND/OUT some are OUT/GND/IN and there's probably other combos as well.

Rob

3

Graynomad:
Gotcha, some are IN/GND/OUT some are OUT/GND/IN and there's probably other combos as well.

Rob

I've designed a matrix to handle all three combinations:
in out gnd
out gnd in
gnd in out

You just have to know which combo it is. BTW, you can plug a sensor in a column or a row so if the sensor needs to face left-right instead of up-down, you can do that too. This is perfect for making mistakes :wink:

4

I made a little bench power supply with a 5v 3.3v and 317 regulators on it and bolted them all down to a large heatsink from a power supply, luckily I noticed my mistake before applying power but then I had to fish through the garbage looking for isolation pads and washers

it was enjoyable to say the least