smarcus3's Content

#36964 Netduino Plus - Login to Windows Network

Posted by smarcus3 on 10 October 2012 - 03:16 PM in Netduino Plus 2 (and Netduino Plus 1)

After you talking about the security and all I don’t want to annoy IT with connecting a non-work device. I wish I could think of a completely new project, but I’ve been having trouble. I’ll have to ponder it.

#36961 Netduino Plus - Login to Windows Network

Posted by smarcus3 on 10 October 2012 - 02:50 PM in Netduino Plus 2 (and Netduino Plus 1)

I really just need to come up with a new project idea.

#36960 Netduino Plus - Login to Windows Network

Posted by smarcus3 on 10 October 2012 - 02:49 PM in Netduino Plus 2 (and Netduino Plus 1)

I was just thinking the same thing. Haven't tested it out. I'm sure its a security thing.

#36958 Netduino Plus - Login to Windows Network

Posted by smarcus3 on 10 October 2012 - 02:40 PM in Netduino Plus 2 (and Netduino Plus 1)

I use it to access an http website.

#36956 Netduino Plus - Login to Windows Network

Posted by smarcus3 on 10 October 2012 - 02:27 PM in Netduino Plus 2 (and Netduino Plus 1)

I was wondering if it was possible to get the N+ to log into a windows network. I would like to sue mine at work, but without these credentials I cannot get into the network. Thanks.

#28428 PCB for Shifter Circuits

Posted by smarcus3 on 02 May 2012 - 05:27 AM in Project Showcase

1) okay.

2) isn't a problem of brightness, but of voltage compability: you must match the correct voltage. All the HC595 should be supplied using +5V only, and the resistors raised so that the max current won't be overflown. Note that is just a problem regarding the value of the resistors, nothing else.

3) A LCD backlight requires about 150mA for shining. It's a led matrix/array, which has to be correctly powered. In which way could you limit the current whereas is too much? In the schematic of Szymon, the transistor must "eat" everything is over the necessary, causing (1) overheat and (2) power wasting. A simple resistor is enough: it is *NOT* the best solution, but it's damn simple.

4)
http://highfieldtale...y-for-netduino/

5) and 6) Stefan is a very valuable guy, but sometime is...running too fast, without actually watching at standard solutions, or commonly used patterns.
Take this chip, which is very common in the past: http://socrates.berk...iles/DM9368.pdf
It's a HEX-to-7 seg display decoder. The wiring of the display must follow the correct pattern, otherwise the result will be nonsense.

The MAX7219 is also a good idea. Please, consider the http://www.austriamicrosystems.com/ chips as well: they offer several interesting chips, yielding management of led-matrix, RGB-leds, etc.

Cheers

Good points once again. Where would the resistor go per point 3

#28427 PCB for Shifter Circuits

Posted by smarcus3 on 02 May 2012 - 05:25 AM in Project Showcase

It's actualy this series that lead me into that chip:
http://fabienroyer.w...ith-a-netduino/
Fabien and Bertrand have started from driving each led by itself, via 595, and at last the max chip for driving the leds

Yes, free shipping from China to Norway helps, and it usually takes about two, max three weeks.

Thanks for the link.

#28420 PCB for Shifter Circuits

Posted by smarcus3 on 02 May 2012 - 04:14 AM in Project Showcase

Those are pretty darn cheap on eBay though shipping from china so it will take FOREVER to get here.

#28418 PCB for Shifter Circuits

Posted by smarcus3 on 02 May 2012 - 04:12 AM in Project Showcase

When you get the MAX7219 and use it could you share the code / circuit with me?

#28409 PCB for Shifter Circuits

Posted by smarcus3 on 01 May 2012 - 11:09 PM in Project Showcase

Where did you purchase for that price? I can get the 595s for that at dipmicro. My projects use LEDs for showing the status of various things like power and activity.

#28407 PCB for Shifter Circuits

Posted by smarcus3 on 01 May 2012 - 10:10 PM in Project Showcase

I used the 595 bc they are cheap n common

#28396 PCB for Shifter Circuits

Posted by smarcus3 on 01 May 2012 - 06:16 PM in Project Showcase

Now to PCB stuff. 1) I am putting multiple b/c they are going to be cut out at home once they are printed. I wanted to see how many I could fit into the space. 2) GREAT IDEA. Ill definitively implement this so the user can change the LCD plugged in. Thanks for all the advice.

#28395 PCB for Shifter Circuits

Posted by smarcus3 on 01 May 2012 - 06:14 PM in Project Showcase

5) The seven seg is wired like this tutorial: http://netmftoolbox....itshift7Segment The seven segment is wired this way b/c thats how the library was written. I will probably reverse the LED driver though as reverse logic isn't as intuitive. 6) Same as point 5 7) I might reverse this, but Ill write a simple function so this could be corrected behind the scenes.

#28394 PCB for Shifter Circuits

Posted by smarcus3 on 01 May 2012 - 06:08 PM in Project Showcase

Mario, I am going to try to answer all your points one by one.

1)
The brightness changes very slightly with different for the seven seg display but not very noticeably. I did this to keep the overall size of the pcb down.

2)
If 5V is used for the LEDs, they will use 15 mA each or 106mA for the 595 which is above the 70 mA its allow to drive. Is this correct?

3)
I have LCDs hooked up like this and this is the tutorial I have followed. My link They seem to work fine.

4)
Do you have a link to your library?

#28379 PCB for Shifter Circuits

Posted by smarcus3 on 01 May 2012 - 06:49 AM in Project Showcase

Thanks for the response. Ill respond to it tomorrow when it's not so late.

#28377 PCB for Shifter Circuits

Posted by smarcus3 on 01 May 2012 - 04:40 AM in Project Showcase

Here is a bmp of the schematic

Attached Files

PCB_Combined_Schematic.bmp 537.95KB 23 downloads

#28375 PCB for Shifter Circuits

Posted by smarcus3 on 01 May 2012 - 03:37 AM in Project Showcase

Here is a better pic of the PCB showing traces ...

Posted Image

#28370 PCB for Shifter Circuits

Posted by smarcus3 on 01 May 2012 - 02:33 AM in Project Showcase

I have been designing for a little while now a few circuits which I commonly use the 74HC595 to control. Right now these are:

LCD Screen
7 Segment Display
7 Individual LED Driver

This list is changing and growing as time passes.

I have been designing my circuit using ExpressSch and the PCB with ExpressPCB. ExpressPCB offers 'cheap' PCB manufacturing with 3 PCBs measuring 3.8" by 2.5" for $60 with shipping.

Below is my circuit diagram and the PCB diagram. Each of the boards will be separated manually and can be daisy chained together.

Posted Image

Thoughts? Comments?

#28326 Daisy Chain of Ic74HC595 can it control a LCD screen.

Posted by smarcus3 on 30 April 2012 - 04:27 AM in General Discussion

If I wanted to make a 595 control 8 leds, should I use the 595 or some other IC. If I used another how would it be used on the same ic chain? Thanks

#28313 Daisy Chain of Ic74HC595 can it control a LCD screen.

Posted by smarcus3 on 29 April 2012 - 08:53 PM in General Discussion

that it does.

#28311 Daisy Chain of Ic74HC595 can it control a LCD screen.

Posted by smarcus3 on 29 April 2012 - 08:41 PM in General Discussion

Wired up wrong.

#28308 Daisy Chain of Ic74HC595 can it control a LCD screen.

Posted by smarcus3 on 29 April 2012 - 08:38 PM in General Discussion

Just figured it out. Thanks

#28306 Daisy Chain of Ic74HC595 can it control a LCD screen.

Posted by smarcus3 on 29 April 2012 - 08:04 PM in General Discussion

Is your LCD requiring 3.3V or 5V?

I believe 5V but it should be receiving that. All I did was stop using the microlcd library functions and used your lines of code instead. The wiring is unchanged. I think it might be miss wired on the N side.

#28304 Daisy Chain of Ic74HC595 can it control a LCD screen.

Posted by smarcus3 on 29 April 2012 - 08:01 PM in General Discussion

I just finnaly got around to testing this and I cannot get the lcd to display anything. Which pins of the IC go to which Pins of the N. I hooked it up like the example but it is not working.

#28154 Driver 8 LEDs with 74HC595 shift register

Posted by smarcus3 on 26 April 2012 - 05:06 PM in Netduino 2 (and Netduino 1)

Can you add one of the TI's power registers TPIC6A/B/C595 or xxx596 to a daisy chain of 595s? If so how would it be hooked up?