Re: 5 x 7 dot matrix LCD display

On Apr 2, 4:13 pm, "Dave" <db5...@xxxxxxxxxxx> wrote:
"David L. Jones" <altz...@xxxxxxxxx> wrote in messagenews:135181ac-61c6-4eec-9298-751daeb9e77c@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx



On Apr 2, 1:07 pm, "Dave" <db5...@xxxxxxxxxxx> wrote:
Bought one of these for a couple $ today at my local parts depot. Has 14
pins on each side, and looks like a 3-1/2 or 4 digit display.

Huh?
Dot matrix LCD displays usually come as character based modules like
16x2, 16x1, 8x2, 20x2 etc
Are you saying you have a 4 digit LCD not-matrix character module?
A photo and/or part number would help.

Trying to
figure out how I can test/make use of such a device. Any ideas are
welcome.
Google doesn't help much, at least not with what I have searched on so
far.

What's the part number you are searching on?

Also picked up a 3-1/2 or four digit LCD display mounted in an aluminum
case
with a 22 pin ribbon cable coming out he back. Says PROTO and some
numbers
on the back. Similarly, any ideas on how to test/make use of such a
device
are welcome.

Well, if you told us what the "some numbers" are that might help.

Is this like a surplus thing from a disposal store?

Fooling around while I try to finish constructing the circuit to which I
hope to affix such a device.

What exactly do you need?

Dave.

Hey David,

Thanks for the reply. Sorry I couldnt be more specific. The 5x7 dot-matrix
LCD display doesn't have any numbers on it, and yes, it is surplus from what
amounts to a big junk-box. Will try to see if I can get a decent picture of
it tomorrow. The other one says PROTO 804055. Couldn't find anything via
Google... Both of these look like 3-1/2 digit displays. What I am trying
to do is add a digital display to a transistor tester I am building, for the
purpose of indicating the gain of the device under test. Was planning on
using a 7106 and an LCD display, but am having trouble finding these
locally. Thus my fiddling with junk parts.

Will try to upload photos to abse tomorrow.

Thanks again,

Dave

In that case forget the surplus stuff and simply use a standard 200mV
FS panel meter like you mention in your previous thread. Forget
getting the 7106 on its own and rolling your own, everyone carries
standard panel meters.
Simply scale your input voltage to suit the (usually) 200mV full
scale.

Dave.
.

Relevant Pages

  • Re: 5 x 7 dot matrix LCD display
    ... Are you saying you have a 4 digit LCD not-matrix character module? ... LCD display doesn't have any numbers on it, and yes, it is surplus ... FS panel meter like you mention in your previous thread. ...
    (sci.electronics.basics)
  • Re: 5 x 7 dot matrix LCD display
    ... Are you saying you have a 4 digit LCD not-matrix character module? ... LCD display doesn't have any numbers on it, and yes, it is surplus from ...
    (sci.electronics.basics)
  • Re: 5 x 7 dot matrix LCD display
    ... Are you saying you have a 4 digit LCD not-matrix character module? ... LCD display doesn't have any numbers on it, and yes, it is surplus from ... FS panel meter like you mention in your previous thread. ...
    (sci.electronics.basics)
  • Re: Need Help.
    ... '0') from a character to change it to a number, do your calculation, and add 30h to the number to make it a character before displaying it. ... If you want to accept multiple digit numbers as input... ... Once you can display a correct answer all the way up to 9 + 9, I think you'll find it easy to extend it to multiplication. ...
    (comp.lang.asm.x86)
  • Re: 5 x 7 dot matrix LCD display
    ... Are you saying you have a 4 digit LCD not-matrix character module? ... LCD display doesn't have any numbers on it, and yes, it is surplus from what ...
    (sci.electronics.basics)