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Topic: onboard tx rx leds (Read 671 times) previous topic - next topic

dfong

Hi, I'm doing some work with microphone inputs running thru a simple audio amp based around the lm386. I am having a problem getting readings without interference through the analog pins. I have done some reading on this and it seams to be that the tx / rx leds on board the arduino cause signal interference with my analog read. This problem is easily alleviated by using a secondary power supply and then grounding them all together. However, I am trying to put this into a single, tighter package and there really is no need for two seperate power supplys. So, my question is does anyone know if these two onboard leds can be turned off or disabled? I would be okay even with removing them if anyone thinks this would solve the issue as long as it doesnt interfere with the rest of the boards function.

Coding Badly


Have you tried de-coupling...
http://www.thebox.myzen.co.uk/Tutorial/De-coupling.html

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