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 Attaching more than 1 LED to output pin
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By: Anonymous: SalvadorGV () on Thursday, March 17 2011 @ 07:35 PM PDT (Read 2791 times)  
Anonymous: SalvadorGV

I just ordered the Larson scanner kit 5 minutes ago :-)

I would like to know if it is posible to attach more than 1 LED to the controller's output pin. Does the IC have enough current to drive various LEDs? Any ideas are welcomed. Thank you! Salvador

By: Windell (offline) on Friday, March 18 2011 @ 12:56 AM PDT  

The controller can source up to 40 mA on each pin, up to a maximum of 200 mA for the overall chip. If using the standard program, four or fewer LEDs are on at all times, so you can go ahead and draw the full 40 mA. That can be used for two LEDs in parallel-- each with its own resistor --or, if you increase the system voltage to 5 V (the maximum allowed), you can run two LEDs in series, by two in parallel, for a total of four LEDs per output. (Each series pair gets its own resistor.)

Windell H. Oskay

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By: Anonymous: SalvadorGV () on Friday, March 18 2011 @ 10:51 AM PDT  
Anonymous: SalvadorGV

Thanks for your help Windell!


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