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Drive more leds with Netduino


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#1 Paolo Patierno

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Posted 30 October 2010 - 01:10 PM

Hello, I have made a simple circuit to power a Led with Netduino using a NPN transistor to amplify the Netduino PIN base current (8mA) to 20mA for the Led. Now I want to drive more then one Led with more then one pin.I have to use a single transistor for each led ? Or is there a different solution ? Thanks, Paolo

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#2 Flores

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Posted 30 October 2010 - 01:17 PM

Hello,
I have made a simple circuit to power a Led with Netduino using a NPN transistor to amplify the Netduino PIN base current (8mA) to 20mA for the Led. Now I want to drive more then one Led with more then one pin.I have to use a single transistor for each led ? Or is there a different solution ?

Thanks,
Paolo


If you want to drive more leds this way (up to eight), the uln2803 could be handy.

#3 Paolo Patierno

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Posted 30 October 2010 - 01:23 PM

If you want to drive more leds this way (up to eight), the uln2803 could be handy.


in this moment I haven't this component....so I can't drive more leds ?

Paolo Patierno

Microsoft MVP on Windows Embedded & IoT

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Twitter : @ppatierno
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Blog : DevExperience

Blog : Embedded101
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#4 Flores

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Posted 30 October 2010 - 01:29 PM

Then you have to use a transistor for each output.

#5 Paolo Patierno

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Posted 30 October 2010 - 01:30 PM

Then you have to use a transistor for each output.


Ok...how I have thought...Thanks.

Paolo Patierno

Microsoft MVP on Windows Embedded & IoT

Azure Advisor

Twitter : @ppatierno
Linkedin : paolopatierno
Blog : DevExperience

Blog : Embedded101
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