I suppose electrical tape will do the trick. But it's a bit... hmm.. ghetto? smile

Since I am going to add 12V triggering into this unit anyway, make sense to incorporate auto dim backlight since it's easy to program that in since the Arduino board have those input/output built-in. I am most likely going to end up uing 8Mhz ATMEGA 328P as it consumes about 65mW which is perfect for my application.

-Howard