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Power output question...
Besides the explained issues on the schematic, IMHO, you lit the segments for a really really short time. My experience with muxed 7-segments told me that whem muxing more than 4...
Tuesday, 12 June 2012 - 06:43
Convolution?
AFAIK, correlation is a convolution with one of the signals 'time reversed'. In the time domain, it also makes sense: you compare your signal with the desired signal (I mean, the...
Monday, 11 June 2012 - 15:16
Ultrasonic Sensor
Once I saw a level sensor done with a capacitive proximity switch (that was a Cypress PSoC, but this can be done with Atmel's capacitive sensory) that measures the level of water...
Monday, 11 June 2012 - 15:10
Linearizing Logarithmic Potentiometer
Ok, my memory doesn't serve me well, and I might be totally off, but I remember that there were some tricks used to linearize NTC's and such that can be interesting to review:...
Saturday, 9 June 2012 - 16:19
Lithium Ion Capacitor.
Well, I didn't check out if they are stored as batteries. Not by capacitors for sure, even when they are spec'ed at Farads, not Ah. But the reality is that they are in fact a mix...
Friday, 1 June 2012 - 12:29
As rookie on ATxmega, how to deal with ASF ?
Just one point: my actual boss was working as 'library writer' for an automotive electronics maker. All libraries were developed in-house, in C with some asm where speed was...
Thursday, 22 September 2011 - 06:30
NEWS-Atmel and Arduino collaborate on new ARM-based platform
One of the most sexy peripheral is the DMA concept. I would re-written all my routines used for comms and take advantage of the DMA features. I did that for testing with a...
Sunday, 18 September 2011 - 16:14
NEWS-Atmel and Arduino collaborate on new ARM-based platform
I didn't dig deep into the STM32 circle, and I never seen an Arduino in action, but I think tha approach is quite similar. Anyway, I would prefer by far the SAM3U in an even...
Saturday, 17 September 2011 - 22:35
over current protection for bldc motors
For such currents, I saw using linear hall effect sensors that have something else integrated inside. Placement is more or less critical, but calibration can be done easily.
Saturday, 17 September 2011 - 22:26
Help with first revision engineering design document
Although I didn't read fully the thread and besides the fact that where I live in another country, I recommed you also to keep an eye on the legal issues. Underwriter Labs (UL...
Saturday, 17 September 2011 - 22:23

George, the information I gave was for our attempt without reflow oven, where the hot air gun blow a very slow air and far from the board, in normal air, not inside an oven, thus...
Friday, 16 September 2011 - 15:06
Really fast temperature sensor?
I've used AD7708 ADC that has built in PGA and 16 bits for TC's, but is slow. The NTC for cold junction compensation was done by the 10 bit ADC of an ATmega128/1281. It is easy to...
Thursday, 15 September 2011 - 21:58

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