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There have been 17 items by WannaFly (Search limited from 07-June 23)
#6944 Netduino Plus home automation
Posted by WannaFly on 04 January 2011 - 01:31 AM in Project Showcase
#6558 Analog input varying too much on temp sensor (LM335A)
Posted by WannaFly on 27 December 2010 - 02:32 AM in General Discussion
#6561 Analog input varying too much on temp sensor (LM335A)
Posted by WannaFly on 27 December 2010 - 05:06 AM in General Discussion
Rev A Netduino plus, bought it from amazon a couple weeks ago. The ones in this thread http://forums.netdui...pluses-on-sale/Do you have a "Rev A" or "Rev B" board? Netduino or Netduino Plus? When did you buy it?
Mostly zeros, but some 1's and 7's are in the data also.If you connect A0 directly to GND, do you get a consistent reading of "0"?
0
0
0
0
0
0
7
7
0
1
7
0
0
0
7
0
0
0
0
7
0
0
7
7
7
5
0
I do not believe so.Have you plugged AREF into any voltage higher than 3.3V? Or any of the analog references into a voltage higher than 3.3V?
Thanks for the information, that variance wont be that big of a problem, this is mostly an exercise for learning. But, it sounds like this should not be happening?Please note that the analog-digital converter on the Netduino is 10-bit, but it is not uncommon to lose 1- or 2-bits of accuracy with integrated microcontroller ADCs (for a variance of 2-4 on the 0-1023 scale).
Chris
#6573 Analog input varying too much on temp sensor (LM335A)
Posted by WannaFly on 27 December 2010 - 03:06 PM in General Discussion
#6417 Analog input varying too much on temp sensor (LM335A)
Posted by WannaFly on 23 December 2010 - 03:18 AM in General Discussion
#6541 Analog input varying too much on temp sensor (LM335A)
Posted by WannaFly on 26 December 2010 - 09:55 PM in General Discussion
#6140 Netduino Plus - First impressions from a beginner
Posted by WannaFly on 16 December 2010 - 01:56 AM in Netduino Plus 2 (and Netduino Plus 1)
#6542 Netduino Plus - First impressions from a beginner
Posted by WannaFly on 26 December 2010 - 09:58 PM in Netduino Plus 2 (and Netduino Plus 1)
#6334 Netduino Plus - First impressions from a beginner
Posted by WannaFly on 21 December 2010 - 08:38 PM in Netduino Plus 2 (and Netduino Plus 1)
#6354 7 Color LED
Posted by WannaFly on 22 December 2010 - 03:28 AM in General Discussion
#6332 7 Color LED
Posted by WannaFly on 21 December 2010 - 08:34 PM in General Discussion
#6351 7 Color LED
Posted by WannaFly on 22 December 2010 - 03:03 AM in General Discussion
#10206 New Project idea questions - Word Clock
Posted by WannaFly on 25 February 2011 - 07:08 PM in General Discussion
The Projects page (http://www.netduino.com/projects/) has a tutorial on blinking an LED but conceptually you define an OutputPort for each pin (so you'd have 20, likely in an array), and can simply call obj.Write(true) or obj.Write(false) to switch the pin to HI or LO respectively.
Driving a handful of LEDs off the board itself I don't think is a major problem but I'm assuming for something like the project you've linked even a single pin might control a dozen or more LEDs, so you need to make sure you're remaining aware of the current limits of the pins. I think normal practice would be to use transistors to use the signal from the Netduino to control the larger load needed by the project.
ItsDan:
Thanks for the info, I did get the onboard switch to light an LED and it was pretty simple.
I kind of understand what you mean about driving a lot of LEDS, I believe the most on at a time would be close to 100, one for each letter. Unfortunately I haven't used transistors yet so i'll have to pick them up and mess around with them a bit.
#10099 New Project idea questions - Word Clock
Posted by WannaFly on 24 February 2011 - 08:49 PM in General Discussion
#10214 New Project idea questions - Word Clock
Posted by WannaFly on 25 February 2011 - 09:39 PM in General Discussion
#6072 Special Netduino Pluses on sale.
Posted by WannaFly on 14 December 2010 - 03:54 AM in Netduino Plus 2 (and Netduino Plus 1)
#6418 A few messages to the community as the year comes to an end.
Posted by WannaFly on 23 December 2010 - 03:23 AM in General Discussion
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