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Re: Problems with IR Board
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Originally Posted by Kevin Sevcik
I'm thinking this might be an oversight in the circuit design. The 78L05 series of regulators are rated for 100mA max output current. And the IR manual claims the circuit draws 100mA when an LED is on.
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I can't say I agree with this. Here is a quote from the IR board users manual:
Quote:
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When a single LED is on, the current should increase to approximately 19 mA.
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It also says:
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With a single LED on, the power consumption will increase to approximately 228mW.
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Which at 12vdc: (228mW/12vdc) = 19mA.
So at least they agree. My guess is that it is not a design flaw, but more likely a user error. (Sorry, I don't mean to point fingers.) I believe it is more likely the board shorted on something, whether it was one of the output wires or the back board. Either way, replacing the regulator "should" resolve the issue.
So far, I have only read about 2 or 3 boards failing, each time it appears to be the regulator. I'm not ready to jump to any conclusions yet. Let's see if a more consistent pattern develops.
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CalGames 2009 Autonomous Champion Award winner
Sacramento 2010 Creativity in Design winner, Sacramento 2010 Quarter finalist
2011 Sacramento Finalist, 2011 Madtown Engineering Inspiration Award.
2012 Sacramento Semi-Finals, 2012 Sacramento Innovation in Control Award, 2012 SVR Judges Award.
2012 CalGames Autonomous Challenge Award winner ($$$).
2014 2X Rockwell Automation: Innovation in Control Award (CVR and SAC). Curie Division Gracious Professionalism Award.
2014 Capital City Classic Winner AND Runner Up. Madtown Throwdown: Runner up.
2015 Innovation in Control Award, Sacramento.
2016 Chezy Champs Finalist, 2016 MTTD Finalist
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