Hello All,
I have a project that requires a very simple handheld interface to give warning of switched input events using light and sound. To do this I have made a very simple monostable that outputs a pulse driving two LEDs and a buzzer when an external input is received.
I have mounted the PCB inside an off the shelf hand-held plastic enclosure, with two machined holes for the LEDs and an open hole for the buzzer sound to come through. See below.
My problem is that the hole in the middle is a bit of an eyesore and you can see the circuit. It also isn't great for basic ingress protection where the final product will be used in mildly dirty/dusty environments. I would like to find some way of removing or hiding the hole to make it look more professional, while not affecting the sound output too much.
I have thought about using a graphical overlay as these can be made of thin material which could hide the hole under an opaque surface but I was wondering if anyone else has had this problem before and if there were any novel solutions they came up with?
Thank you.