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August 30, 2012
about 4 months ago
Do you know if this will sense a capacitive load through a very small surface area (e.g. tip of a 20AWG wire)? If so, would the large pad on this PCB diminish the sensitivity in such a use case, perhaps requiring the large pad to be disconnected by cutting the trace?
about 10 months ago
FYI, using Arduino IDE 1.6.6 seems to have issues with deprecated platform.txt and subsequent inability to locate avrdude. Reverting to Arduino 1.6.5 solves this.
Oh, now I see below: “The only differences are the voltage regulator and crystal (and a solder jumper).”
Is the only difference between the 3.3v and the 5v the voltage regulator on the RAW pin, and the software configuration (e.g. clk freq)? I see “VCC = 2.7V to 5.5V (unless otherwise noted)” mentioned on page 383 of the 32U4 datasheet. In general, can microcontrollers be powered with a range of voltages?
Specifically, I am wondering if I can run the 3.3v version at 3.6v. Thanks.
about 4 years ago
I bought two of these because I thought I accidentally fried the first one.
However, I observed that the X-Y-Z axes are centered at different values for my two MMA7361s, even though documentation indicates that all axes should be centered at Vcc/2 = 3.3/2 = 1.65:
 x:1.55 y:1.65 z:1.40
 x:1.65 y:1.75 z:1.45
Am I doing something wrong, or are the centered values just not calibrated right?
useful application note :: http://www.freescale.com/files/sensors/doc/app_note/AN3461.pdf
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