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There have been 60 items by klotz (Search limited from 28-September 23)
#3216 netduino harness
Posted by klotz on 29 September 2010 - 10:21 PM in Netduino 2 (and Netduino 1)
#4151 Where can I get an at91sam7x512
Posted by klotz on 23 October 2010 - 08:32 PM in Netduino 2 (and Netduino 1)
#2408 Getting off to a good start with Netduino
Posted by klotz on 17 September 2010 - 10:23 PM in General Discussion
EDITTED---
I purchased an AdaFruit Protoshield and that's all build and piggybacking my Netduino. What's not clear to me is how the various buttons on the shield relate to the Netduino. For example, I have two LEDs on the protoshield and two buttons. How are these addressable through code (given that the Netduino only has one of each)?
EDITTED AGAIN--
What I'd like to do as a next step is control a 5v motor, attached to the shield, and have its speed adjusted with a photoresister. Pretty basic, eh? :-) I'm not clear on how/where I'd hook up the motor to the shield (which pins) and also where the photresistor fits into the picture (on the shield in series with the motor, presumably, but what voltages should I use)?
And again
Thanks.
Mark
I hope you don't mind I didn't quote your entire post since I am going to start by answering the easy parts . But here goes:
One of the buttons (the one labeled RESET) is tied to the reset on your board and that is all it can do for you.
The other button and the two LEDs are not assigned to any function instead they are tied to ground on one end and the other is to a pad you can route to any of the DIO ports. The LEDS have a current limiting resister on them so they are safe. You just have to make sure you define the DIOs used with the LEDs as outputports and the button as an input port with a pullup. You can view the schematic here: http://www.ladyada.n...v5schematic.png
#760 What is the best programming environment for you?
Posted by klotz on 18 August 2010 - 03:34 PM in General Discussion
What is the best programming environment for you?
Ideas of what to specify:
-Music
-People around you (# of, type of)
-Food/Drinks
-Noise level (cars, people, etc...)
-Computer specs
-anything else
For me:
music - Metal as loud as I can stand it; maybe some dark metal like Cruxshadows, Without Tempation ...
People - Barnie my conure. She counts as a person doesn't she!
Food/Drinks - The days of Twinkies and Orange soda are way behind of me, I have to watch my weight so no food, Coffee or Diet Coke to drink
Noise level - I have no tolerance for that stuff thats why I have the music and over the ears headset.
Computer specs - Two 24" wide screens, one for code, one for design/spec/videos.
#320 Newbie Question
Posted by klotz on 12 August 2010 - 09:47 PM in Netduino 2 (and Netduino 1)
#419 Why does this happen
Posted by klotz on 14 August 2010 - 01:31 PM in Netduino 2 (and Netduino 1)
namespace Bug { public class Program { public static void Main() { // write your code here int xValue = 0; int yValue = 0; AnalogInput xvar = new AnalogInput(Pins.GPIO_PIN_A0); AnalogInput yvar = new AnalogInput(Pins.GPIO_PIN_A1); xvar.SetRange(0, 0xffff); yvar.SetRange(0, 0xFFFF); while (true) { yValue = yvar.Read(); xValue = xvar.Read(); //Debugger hangs here and never recovers. } } } }
So far the only remedial action I have found is to totally erase the Neduino and reflash it.
1. Am I doing something wrong in the code?
2. Is there a safer/better recovery than totally erasing the Netduino?
Help.
#427 Why does this happen
Posted by klotz on 14 August 2010 - 04:23 PM in Netduino 2 (and Netduino 1)
Thanks for the reference on erase. I had no idea that it could be done that way. The only answer I could find was to totaly erase the board as I described. I will try that next time.klotz,
Sorry, that's a bug in the Netduino firmware. The AnalogInputs work great--but if you open more than one at a time there's a glitch which causes the Netduino to hang.
You can just erase the program on your Netduino (it takes about 10 seconds). See here:
http://forums.netdui...indpost__p__216
We have an update which fixes the AnalogInput bug scheduled for Monday (in 2 days).
Chris
Well that means that at least one of my projects will be on hold til monday.
Is there a list of open items somewhere so I don't have to spend time finding them on my own?
If so, is there also a list of what is going to be fixed and when?
I
#4396 Where to find these connectors?
Posted by klotz on 31 October 2010 - 05:04 PM in General Discussion
I think this is what you are looking for if the ones in your second picture will work. http://www.sparkfun....roducts_id=8232Hey,
I'm looking for male PCB mount connectors and their female counterparts (leads). I prefer the connectors have only one way to connect, so you can't switch poles by accident.
I've seen leads like these on LiPo batteries, but I can't seem to find anything useful on RS Online or Mouser when searching for "JST connector".
The PCB connector part looks something like the white connectors on this shield.
I'm EU based so I prefer a supplier like Mouser or RS Online that ships easily to Belgium. Any other EU based shop is good too!
Thanks a lot!
Niels R.
#708 Analog Tutorial?
Posted by klotz on 17 August 2010 - 11:37 PM in General Discussion
As soon as I get the all-clear from our users that the new AnalogInput code in the v4.1.0.2 firmware patch is working well for them... It tested out well here, but I'm being extra cautious before I post a tutorial.
The tutorial should work well with the original firmware as well (since the patch only addresses using multiple AnalogInputs at once).
Chris
The new version is working for me so far. I am using it with the SparkFun Joystick shield. http://www.sparkfun....oducts_id=9760. This is the one I was having problems with on Sat.
Thanks for the update!
#3596 Just cooked my 'duino
Posted by klotz on 07 October 2010 - 02:15 AM in Netduino 2 (and Netduino 1)
Hi klotz,
No fun at all. It sounds like it got fried, but you may want to try erasing the Netduino (using the ERASE) pad and seeing if you can reprogram it. It's probably fried--but there's a small possibility of recovery...
Chris
P.S. Reverse power protection and a resettable fuse are built into the Netduino. And the odd pin spacing for shields helps keep pins in the right place. But while Netduino is designed to take a certain amount of abuse, it is possible to fry a pin (or in more extreme cases, to fry a whole Netduino). Most users will be fine--but it makes me sad to see one get electrocuted...
He's dead Chris.
No amount of protection can survive an unattentive user. Just got to excited about testing my two ethernet shields and didn't notice I had plugged it in wrong. The Seeeduino shield is wider than most so it is not as easy to see the pins if you don't pick it up and inspect it.
And of course I was convince I had checked it so I let it cook while I trouble shot the failure to connect. The Atmel was way hot, and I can't get any response from it at all except a very bad smell and lots of heat.
(Kind of reminds me of like Washington D.C. or Springfield, IL)
I'll mount this one on the wall with a note "CHECK THE SHIELD" hanging from it.
That's what overconfindence will get you.
#3629 Just cooked my 'duino
Posted by klotz on 07 October 2010 - 04:39 PM in Netduino 2 (and Netduino 1)
Unfortunately, the Atmel chip is about a $20 chip (of course unless it is purchased in quantity). I'd say digikey is your best bet.
Just be lucky it isn't a ~$150 chip
In either case logic dictates that I order a new Netduino. $20 + shipping and handling and frustration of removing the old and adding a new > 34.95 + shipping and handling.
#3594 Just cooked my 'duino
Posted by klotz on 07 October 2010 - 12:39 AM in Netduino 2 (and Netduino 1)
I ALWAYS triple check my connections. So far, I have not fried even a single component.
I have gotten quite close though Just ask my temp sensor that had a backwards pinout to the dumb datasheet....
I guess I shouldn't try to work on my board with distractions. Just did not notice the pins that were not in their sockets.
#3616 Just cooked my 'duino
Posted by klotz on 07 October 2010 - 10:11 AM in Netduino 2 (and Netduino 1)
Now there's a good suggestion.Since I am normally a software guy, where would be the best place to get a replacement Atmel? Digikey is asking $20+shipping handling tax. Almost the price of a new Netduino.R.I.P.
But now you have a perfect board to practice SMD reworking (assuming you've burnt just the micro)
Any suggestion where else I should look?
#3591 Just cooked my 'duino
Posted by klotz on 07 October 2010 - 12:11 AM in Netduino 2 (and Netduino 1)
#2422 Controlling a LED Intensity
Posted by klotz on 18 September 2010 - 01:03 PM in General Discussion
#3239 Power Questions - i.e. Voltage
Posted by klotz on 30 September 2010 - 02:19 AM in General Discussion
I have run the Netduino, and Parallax boe bot chassis on 4 AA batterys. ( 4 x 1.5 = 6Vdc)You can step the voltage all you want, but it will come as a cost of current. 6V probably would power the Netduino, not 100% on that though, I haven't looked at the schematics yet.
I have been using the same batteries for over a week and had several test runs of the chassis. So I would say, 6VDC will just make it.
Remember you lose about 0.6-1.0 volts to a regulator and the Netduino wants a solid 3.3 Vdc for main power and 5Vdc +- 10% so your can get by.
#6022 InterruptPort please stop interrupting me! Help.....
Posted by klotz on 13 December 2010 - 12:29 AM in General Discussion
#2316 Analog Input problem
Posted by klotz on 14 September 2010 - 11:19 PM in Netduino 2 (and Netduino 1)
I just got my netduino and I'm starting to try to get analog input and I always get 0 when I read my pin(A0). Do you see anything I did wrong?
My setup looks like this
3.3->AREF
A0->Photo Resistor->GND
public class Program { public static void Main() { // write your code here InterruptPort tester = new InterruptPort(Pins.GPIO_PIN_A0, false, Port.ResistorMode.Disabled, Port.InterruptMode.InterruptEdgeBoth); tester.Dispose(); AnalogInput apin0 = new AnalogInput(Pins.GPIO_PIN_A0); apin0.SetRange(0, 100); int test = 0; while (true) { Thread.Sleep(250); test = apin0.Read(); Debug.Print("Test: " + test); } } }
You would need another resister to 3.3Vdc to develop a voltage divider. There is no pull-up in the An-in.
#2318 Analog Input problem
Posted by klotz on 14 September 2010 - 11:41 PM in Netduino 2 (and Netduino 1)
First you need to know what the resistance of the photo resister is. Mine was 25k full dark.I'm confused would it look like
AREF+3.3v->resistor(what resistance?)->ground?->photo resistor->A0?
Second you need to decide if you want it to pull-up or pull-down. I used mine in a pull-up.
Then choose a resitance to give you some kind of reasonable current limit, I chose 10K since I just wanted to play.
So using the attached schematic, I put the photoresister in a R1, a 10k in R2, you can try it either way and pick the one you like.
#2321 Analog Input problem
Posted by klotz on 15 September 2010 - 12:49 AM in Netduino 2 (and Netduino 1)
The fun is just beginingThank you for explaining now i understand. Time to play with my netduino!
The next thing you want to do is check out the projects page.
#2330 Analog Input problem
Posted by klotz on 15 September 2010 - 10:55 AM in Netduino 2 (and Netduino 1)
My guess: CadSoft Eagle (?)
Yep, I use Cadsoft Eagle. But don't ask me for help with it. I am just returning to doing hardware after 40 years and am trying to catch up.I just kindof hack away with Eagle until something works.
#6913 Question about SPI
Posted by klotz on 03 January 2011 - 03:28 PM in General Discussion
If available and if the distance is not too great I would prefer I2C over SPI.
Could you break this down a bit more? Distance being what? If I have a central Netduino in the house, and several scattered around the property, what's the prefered for 50 -200 ft, CAT5 cable?
I would not use I2C or SPI for those distances. In the first case, one should not think of I2C or SPI as a protocol for anything say outside the box. Both are intended for communication between ICs or small peripherals, like ethernet chips, lCD displays and the like.
If I have to go more than a couple of feet, then I would start to concider one of the interconnect serial protocols like Async (TTL, RS232, or RS485.)
Then if we are in the range of Room to Room or greater I would concider ethernet.
So in answer to you direct question. At 50-200ft, especially if you have already installed CAT5, go ethernet. The shields for 'duinos are cheap and .NETMF makes it easy to program.
#6866 Question about SPI
Posted by klotz on 03 January 2011 - 12:25 AM in General Discussion
Tx and Rx are used for Asynchronous Serial communication which is sometimes described as "self clocking". This is misleading to most users in that the data rate must generally be agreed upon before hand as Chris has stated, the selfclocking come from the method for detecting the begining of the data octet or byte. Here is the Wikkipedia page that describes this http://en.wikipedia....ver/transmitter as before I can only vouch for the correctness as of Jan 2, 2010 when I read it.What are the differences between SPI and the other thing that uses TX and RX? I understand that SPI has a clock so the shift register (lets use that as an example) knows when to read the other pin for a HIGH or LOW. but then how does the TX and RX communicate? how does it know when to get the data? Are they both Serial types of communication or not? Any info is appreciated, links are good too. Thanks!
If I had a choice, I would use SPI over TX/RX because it is easier for me to use. If available and if the distance is not too great I would prefer I2C over SPI.
#6865 Question about SPI
Posted by klotz on 03 January 2011 - 12:19 AM in General Discussion
What are the differences between SPI and the other thing that uses TX and RX? I understand that SPI has a clock so the shift register (lets use that as an example) knows when to read the other pin for a HIGH or LOW. but then how does the TX and RX communicate? how does it know when to get the data? Are they both Serial types of communication or not? Any info is appreciated, links are good too. Thanks!
I don't know how much time you have to read stuff, and we could spend a lot of time asking and answering questions so I thought that it may be helpful to supply you with a link to the Wikki page that describes SPI. This may be way more than you wanted to know but there are nuances to using SPI that are not immediately apparent and which many of us take for granted. So here is the Wikki link ( and yes I read it and it is a good description on Jan 2, 2010 You know how Wikkipedia can be )
http://en.wikipedia....l_Interface_Bus
#878 SFE Joystick Shield
Posted by klotz on 20 August 2010 - 12:28 AM in Netduino 2 (and Netduino 1)
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