I have this setup,
simulate this circuit – Schematic created using CircuitLab There is also a button connected to the Arduino and every time the button is clicked the arduino cycles 3 levels of brightness on the LEDs. The problem is that when the LEDs are at full bright the Arduino no longer has enough voltage to run ~3v down from ~4v when off and so becomes locked at full brightness.
From what I have learned in physics I thought that when a circuit was in parallel the components acted as if they were independent of each other however this is not what I see here.
How do I drive both the arduino and LED strip with the same battery? Is it possible the battery is not supplying enough current?