Electronics > Beginners

Sequential tail lights

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CJay:

--- Quote from: Mr. Scram on October 02, 2018, 12:11:11 pm ---
--- Quote from: robjodicarter on October 02, 2018, 03:16:06 am ---So any 5 volt how many amp? I'll look it up. I'm a big boy. I should be getting all this stuff soon. I will let you know when I get it all. I'll be asking tons of questions I imagine.
Rob

Sent from my PH-1 using Tapatalk

--- End quote ---
5V might be too little for the Arduino. This is because it has its own regulator on board which will eat up a bit of the 5V you supply it. You may want to look up what voltage regulator drop out voltage is.

--- End quote ---

You can bypass the regulator and feed the Arduino 5V directly.

Mr. Scram:

--- Quote from: CJay on October 02, 2018, 02:50:32 pm ---You can bypass the regulator and feed the Arduino 5V directly.

--- End quote ---
Obviously, but either way it's something to be aware of.

Brumby:
I don't think the Arduino will have any problem running from 5V.  My Mega 2560 ADK board works perfectly off 5V USB power - and it's hosting a scanning laser barcode scanner.

He will be able to do a 10 LED sequential tail light with just the Arduino, 10 LEDs and 10 resistors - which will be well within the 500mA current capacity of basic USB.

Mr. Scram:

--- Quote from: Brumby on October 02, 2018, 03:31:42 pm ---I don't think the Arduino will have any problem running from 5V.  My Mega 2560 ADK board works perfectly off 5V USB power - and it's hosting a scanning laser barcode scanner.

He will be able to do a 10 LED sequential tail light with just the Arduino, 10 LEDs and 10 resistors - which will be well within the 500mA current capacity of basic USB.

--- End quote ---
I've had problems with it in the past when using an Arduino Uno Rev3, which is why I mentioned it. Using a 12V adapter instead fixed the problem.

Brumby:
Interesting - I haven't.

Looks like something to be aware of if strange things start happening to the OP...

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