I was wondering if anyone has used an arduino off a 9v (using instructions off of the playground for soldering the correct power plug) and has any observations about about how long it lasts.
Currently I have the original USB model Arduino and I’m using it in a halloween costume. Basically it’s being incorporated to a helmet with a piezo disk that will cause LEDs to flash whenever I speak. The LEDs will normally be off and only turn on when I talk, so they will not be a constant drain on the battery. Although depending on responses here, I have LED’s I was going to wire to a seperate battery for the eyes but may attach to the Arduino and make flash also if the results here are encouraging enough.
There are about 12 red LEDs of a normal size (not counting the 2 for the eyes that I’m not sure I’m adding yet) and I’m trying to find out if anyone had any idea how often I’d be changing the battery.