Hi there, First off, thank you to everyone who's posting on this forum. Your input has helped me a great deal up to this point. I have now reached an issue which I cannot find an answer to by simply searching, so I decided to jump onboard and ask myself. =] I am currently putting together a batter…

Hmm, no luck. I tried using digitalWrite as well but the LED still turns on briefly as I turn on/reset the arduino. Thanks for the prompt response though. =] Would you happen to have any other ideas?

digimike - he said it happens between hitting the reset button and the program starting. Posting code won't make a jot of difference. Posting a schematic and some datasheet links on the other hand...

What you are seeing is that the Arduino pin is a 'floating input' until your sketch gets to take control of the pin and sets it to output mode. Your driver needs to see a solid zero as soon as power is applied to it if you don't want this behavior. This doesn't happen until after the bootloader has …

So what you need is a simple external pull-down resistor, say 10K ohms wired between the drivers EN pin and it's ground pin. Try that and see if it doesn't fix things up for you. Ah that works! Such a simple fix too. I was definitely overthinking this one. =] I'll definitely keep this 'floating i…

Setting pins to LOW as arduino starts up?

Forum 2005-2010 (read only) Hardware Troubleshooting

system March 9, 2010, 1:49pm 2

Use this in the setup.

analogWrite(ledPin, 0);

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Setting pins to LOW as arduino starts up?

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