I'm building my panel using a number of back-lit tac switches (tactile switch with a built in LED). I was wanting to know if it might be possible to use the same LED to indicate a parameter by blinking? I've read other threads where parameters such as AP_NAV_On can have a blink when armed value. What is different about my request is that I would like the backlight to come on when the avionics are powered up. I would normally tie the LED to Avionics_On to make the backlight work, but I'm looking for a way to change that LED to blink when a button is pushed.
My use case for this is mostly with the audio panel, where I have 8 tac switches for the audio inputs. I'd like the back lights to come on with the avionics stack, and, for instance, for the COM1 LED to blink when Audio_COM1 is selected. Let me know if you have any ideas how I might be able to make this work.