Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Basically yes - but the LCD has a much slower response than an LED so the
multiplexing frequency cannot be very high.
On the other hand a static drive is not good either because it will cause "burn-in"
of the segments.
Check this link for some useful information: **broken link removed**
I got a couple of old cheapo multimeter each about 3 bucks and they have a 4 digits 7seg LCD. I opened up the multimeter trying to see if I could rip out the LCD to use with my project. The LCD in the multimeter has no output wires but only a rail of soft spongy material that lay against the trace on the PCB. The spongy material is conductive i guess.
Is there a socket or some sort that I could insert the LCD into that has output wires to the LCD?
The spongy material is an elastomeric connector commonly known as a "zebra strip".
If you check the 3555A datasheet on this site **broken link removed**
you will see that there is a type of connector that "pinches" the glas - but I have
no idea of how to get hold of it.
The connecting pads on the glas are very sensitive to scratches so maybe your
best bet is to reuse the zebra strips and make your own PCB with the same
connector layout as in the multimeter - and preferably the PCB pads should be
gold coated.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.