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April 14, 2014
Someone asked the same question in comments on shelf3d.com and the maker of this board said: “Kevin Darrah: nah, I wouldn’t use this circuit. I would sample the output of mic and compare that against a profile to determine barks, or just a level function, since barks are louder an sharper than most stuff in your house.”
http://forum.arduino.cc/index.php?topic=204601.0 has some code for very simple bark detection but I don’t know how reliable it is.
about a year ago
I had no problem with custom characters using this LCD purchased a month ago from Sparkfun.
about a year ago
The DB9 pins on this CAN shield must follow some common standard because they match the OBDII to DB9 cable I bought on Amazon.
Here are the pin assignments as seen when looking at the tips of the pins in the female DB9 connector on the CAN shield:
\ 1 2 3 4 5 /
\ 6 7 8 9 /
3 CAN High
5 CAN Low
The LCD connector puts out 5V power and 5V TTL serial (very annoying that isn’t listed anywhere in the specs or description). I was able to run it with one of the Sparkfun 3.3V LCDs by connecting the LCD’s power to the 3.3V pin on the arduino. Trying to run the 3.3V LCD at 5V freezes it. Ground can be connected to LCD ground or arduino ground. Interestingly, although the 3.3V LCD description says it must also receive 3.3V TTL serial, the 5V TTL serial output by the CAN bus shield seems to work. However, I was worried about it getting damaged over time so I added a 100 and 200 ohm resistor to divide the voltage to 3.3. Actually it ended up at 2.5V for some reason but it’s been working fine.
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