Skip to main content

Best practices: buzzers inside enclosures.


ElectricJosh

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.

For_DS_e1e81df3930af31e65cfc247fbce2ea7788e11b4.jpg

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.

DesignSpark Electrical Logolinkedin