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Easy multiplexing with the Netduino

Started by Stefan, Apr 12 2011 09:39 PM

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64 replies to this topic

#61 tommy.vaz

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Posted 02 April 2013 - 01:55 PM

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Hi guys!
I'm building my own I/O shield for my N+2, but instead of give current to the outPins from the Netduino +5V, I prefer to take current from the +5V/2A external power supply that I already use on another shield in the same project.

This because of, for istance, if I would use 16 standard leds (one on each outPin) those will use about 300mA! Same thing while using some relays.. Am I wrong?

Any idea on how to work around this project, giving a new feature to Stefan's job?

Thanks!


#62 tommy.vaz

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Posted 02 April 2013 - 10:02 PM

[font="'comic sans ms';"]EDIT:[/font]
I have bought a darlington arrays i.c. (ULN2003A, 0.47€/each) and a reed relay i.c. (D1A051000, 3.45€/each).

Datasheets:
http://www.datasheet...ronics/5279.pdf
http://www.datasheet...t7alts320yy.pdf

So, imho:


    [*]With the darlington arrays I can inject current from another supply, maximum 500mA...
    [*]With the reed relay I have the lowest power consumption (from N+2), but for many outPins it will be a great € investment..
    [/list]

    Is there anyone interested in the project?
    What do you think?

    Bye


#63 pjnowak

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Posted 28 June 2013 - 06:40 PM

[font="'comic sans ms';"]EDIT:[/font]
I have bought a darlington arrays i.c. (ULN2003A, 0.47€/each) and a reed relay i.c. (D1A051000, 3.45€/each).

Datasheets:
http://www.datasheet...ronics/5279.pdf
http://www.datasheet...t7alts320yy.pdf

So, imho:


    [*]With the darlington arrays I can inject current from another supply, maximum 500mA...
    [*]With the reed relay I have the lowest power consumption (from N+2), but for many outPins it will be a great € investment..
    [/list]

    Is there anyone interested in the project?
    What do you think?

    Bye

 

I am rather interested to see how this works as it sounds like I am trying to do something rather similar.  I would like to add also an override switch after so that you can either turn it off, manual on, and finally let the Netduino control the on off.


#64 etshology

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Posted 29 July 2013 - 11:24 PM

Hi Stefan!

Thanks for the amazing artilce :) Can you please provide me with the following classes:

  • Ic74HC595Chain.cs
  • Ic74HC595.cs
  • OutputPortShift.cs

#65 Djeizan

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Posted 30 July 2013 - 09:12 PM

I have one problem with 74HC165, i´m using the library IC74HC165 from http://netmftoolbox.codeplex.com/, but the first bit (pin 11 from CI) can´t be mapped, the software mapped the pin 12 like port 0.

anybody can help me ?

[]´s

Djeizan


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