Unfortunately I don’t have a PSD for it, since it was just something I created by adding circles and removing a portion of the circle using the eraser tool. I didn’t save it as a PSD so it’s not really an adjustable file, it’s just an image. However, you can use the much easier html/css and jquery way of doing it without needing to use photoshop….if you’re interested.
Here are a couple examples –
http://anthonyterrien.com/knob/
http://css-tricks.com/css-pie-timer/
http://blakek.us/labs/jquery/css3-pie-graph-timer/
http://www.jqueryscript.net/tags.php?/pie+chart/
There are plenty more tutorials out there if you need. I did a Google search and came across those.