This is an updated version of the plant circuit.
The DS2408 data sheet recommend 470 Ohm instead of 220 Ohm in series with the LED Does it matter? Also the plug isn't exactly the one we use. The order on the 3.5 mm plug should be GND - OW - VCC counting from the plastic on the male plug to the tip of it.
And here is an idea of how to do the physical layout: