2 LEDs and one pin left


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  1. #1
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    can we use a voltage divider to get this 3.3 from 5?
    And run the whole thing? Nope.

    Using 5 volts with 470 resistors the thing I posted works fine.
    Dave
    Always wear safety glasses while programming.

  2. #2
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    Default well its my DOH!!

    Dave thank you! I actually intended to hook it up this way, but somewhere between yesterday and today I got myself turned around. I even drew it up this way in my schmatic. double DOH! So 470 both sides, makes sense to me!

    Prolly the only size sips I didn't order.
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    The glass is not half full or half empty, Its twice as big as needed for the job!

    http://foamcasualty.com/ - Warbird R/C scratch building with foam!

  3. #3
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    I want to get a better idea of how these LED circuits will work.

    So let's take a look at how the DOH! circuit will perform ...

    <OBJECT CLASSID="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" CODEBASE="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,40,0" WIDTH="820" HEIGHT="620" ><PARAM NAME="MOVIE" VALUE="http://www.pbpgroup.com\files\2LED\LED-470.swf"><PARAM NAME="PLAY" VALUE="true"><PARAM NAME="LOOP" VALUE="true"><PARAM NAME="QUALITY" VALUE="high"><EMBED SRC="http://www.pbpgroup.com\files\2LED\LED-470.swf" WIDTH="820" HEIGHT="620" PLAY="true" LOOP="true" WMODE="opaque" QUALITY="high" TYPE="application/x-shockwave-flash" PLUGINSPAGE="http://www.macromedia.com/go/getflashplayer"></EMBED></OBJECT>


    It's more significant since you will be using 3 sets of 2-LEDs.
    DT

  4. #4
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    cncmachineguy, The only problem with this circuit arrangement is there will always be current flowing in the circuit even if the LED's are supposedly off...

    Dave Purola,
    N8NTA

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    OK big thanks to Darrel for the sim

    As for the constant current draw, In this app its no big deal. I will have a 5V 20A supply so I don't think it will be an issue. As long as no ones hot, they can draw all they want. Now I realize this would never be good in a battery app, so I will keep this in mind.

    Overall thanks to all who helped out on this thread.
    -Bert

    The glass is not half full or half empty, Its twice as big as needed for the job!

    http://foamcasualty.com/ - Warbird R/C scratch building with foam!

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    cncmachineguy , Hey, We all have to think GREEN nowdays......

    Dave Purola,
    N8NTA

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    Quote Originally Posted by Dave View Post
    cncmachineguy , Hey, We all have to think GREEN nowdays......

    Dave Purola,
    N8NTA
    I agree

    If you make a product and it sells let say 1M unit, then; since you are drawing 20mA for nothing, it will cost & consume 20,000A for nothing.

    But, the question then would be this : Would I care that much if I could manage to sell 1Million units of anything ?
    "If the Earth were a single state, Istanbul would be its capital." Napoleon Bonaparte

  8. #8
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    Default Flash Animations form Proteus

    Quote Originally Posted by Darrel Taylor View Post

    <OBJECT CLASSID="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" CODEBASE="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,40,0" WIDTH="820" HEIGHT="620" ><PARAM NAME="MOVIE" VALUE="http://www.pbpgroup.com\files\2LED\LED-470.swf"><PARAM NAME="PLAY" VALUE="true"><PARAM NAME="LOOP" VALUE="true"><PARAM NAME="QUALITY" VALUE="high"><EMBED SRC="http://www.pbpgroup.com\files\2LED\LED-470.swf" WIDTH="820" HEIGHT="620" PLAY="true" LOOP="true" WMODE="opaque" QUALITY="high" TYPE="application/x-shockwave-flash" PLUGINSPAGE="http://www.macromedia.com/go/getflashplayer"></EMBED></OBJECT>

    Hi, everyone;

    Can somebody teach me how to do this flash animations, from Proteus?
    I have the Proteus 7.7 SP2.

    Thanks in advance
    Thanks and Regards;
    Gadelhas

  9. #9
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    Well, Proteus doesn't export Flash.
    But it does export images in several different formats.

    For the animation above, I had to export one image for each possible state.
    I used 4 different resistor combinations, and 3 switch states per combination, so it took 12 images for the whole thing.

    The images were imported to Aligator Flash Designer from Selteco, where you can add the transition effects and define the sequence according to what people click on. Add some "Circles and Arrows with a paragraph on the back of each one" and you have a Flash Simulation.

    The one above took about 8 hours or so.
    DT

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    Thank you DT for your explanation!! I will try to do it like you said.
    Thanks and Regards;
    Gadelhas

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