How to use this miltimeter display

I have this dead multimeter with a 4 digit 7 seg LCD. I was wondering how I could make use of it. It has a very strange rubber piece connecting it to the circuit board. Any help would be great. I'm pretty interested in this rubber piece.

Thanks!

Hi,

That rubber piece is a conductive connexion between the circuit board and the display. Is made of different conductive and not conductive layers.

If you want to use it, you need to do a new circuit board or cut the circuit you have, and do the mechanical connection. By other side, you need to know the display pins and how to wiring.

I think you must to use lot of hours for that, and probably not success. You can find different cheap displays in eBay.

Making the connections isn't enough to make it work. You need a dedicated LCD controller for a "dumb" passive LCD glass like that.

An example is the AY0438 from Microchip, i use that in a project, it only supports 32 segments, so that's a limit, but You can daisy chain them.

You need to find out if the LCD is multiplexed - if it is, you need a controller which supports this - The AY0438 only supports non-multiplexed LCD glass.

Trying to resurrect a display from a Multimeter is a bit crazy i think, but if that is your wish, go for it!

// Per.