Recent content by tourist

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    Adding led brake lights

    Mine aren't running too hot.  We'll see after the project is completed if I need the led brighter. Finally got the circuit board  done and tested.  After a couple of days and countless tries finally got the traces to transfer to copper.  Drilled holes, mounted stuff.  Just looking around the...
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    Adding led brake lights

    Heres the led board. The lens was my first attempt, wrong color.
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    Adding led brake lights

    Heres the circuit board for now.  Don't know if I can make those tiny traces.  The board is actually 2" by 1 5/8".
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    Adding led brake lights

    I did try.  Even with the colored lens I am satisfied.  They should put a warning on every led to remind you not to look directly at them.
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    Adding led brake lights

    Here is what I built and tested and included some real voltages and currents.  I'm thinking this is the final version and going to start on the circuit board design. audioguru,  Thanks for your help, I hope I interpreted correctly.
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    Adding led brake lights

    I'm thinking it may be bright enough.  Hard to actually tell from picture but it does look good so far. The leds are from that display.  I think they are 3mm high flux. (http://www.superbrightleds.com/cgi-bin/store/index.cgi?action=DispPage&Page2Disp=%2Fspecs%2Fhf3-y5570.htm)  It has a 12vdc...
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    Adding led brake lights

    This is going on a BMW motorcycle.  I could be wrong but it is my understanding that the "computer" controls these lights and monitors over current and under current conditions.  I have seen an extra 20 milliamps drawn when somebody used a relay in the circuit for their lights.  Don't know if it...
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    Adding led brake lights

    Got rid of the Vcc/2b. Changed Vcc/2a resistors. I put the pull down resistors on pins 3 and 5 for the turn signal side.  I think I still need to use an op amp and transistor because of the total current draw from LEDs (7-10).  Correct me if I'm wrong, I may not have mentioned the quantity of...
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    Adding led brake lights

    I think its getting there.  I'll fix the leds symbols in the next circuit diagram. Are the 1k resistors on the base needed or should they be a different value? Are the 1k resistors on pins 3,5,10 and 12 needed  or of a different value? I drew them in there because I saw them in similar...
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    Adding led brake lights

    Well, I thought about that.  Got a CA324E that I tried but didn't get any output.  So I went out and bought the lm324 just in case my ic was bad.  The new 324 didn't work either.  This is the circuit, for the most part. Now I only hooked up one op amp from the package and left the other pins...
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    Adding led brake lights

    So, is there a better op amp to use?  I thought since there were four different inputs, left turn, right turn, left brake light and right brake light I could use a quad op amp package in the circuit instead of the 741 but I'm still just seeing if it can work.  If there is a better suggestion I...
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    Adding led brake lights

    I need to build a circuit to detect when the brake lights are on and the turn signals on.  The brake light and tail light are the same bulb.  The tail light uses 2.4 volts then when the brake is applied the voltage increases to 13.8 volts.  This circuit seems to work on my test board.  When the...
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