|In the photos below, you can
see the small panel mounted LED that I located in my panel
just low and left from the backup altimeter. I haven't yet turned the light on, but I will be adjusting the resistor value inline to make this LED just visible in daylight, so it won't get obnoxious at night. I just want a simple friendly reminder and want it unobtrusive. Also shown below is a sample screenshot from the GNS480, while it is set to read off the CO level in ppm, and cabin pressure and temp. The nice thing about these units is that they will display very small amounts of CO in the cabin, so if you have any leak at all, it may be easily visible.