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STOP WATCH LCD TO A LAGER LCD " HOW TO"

L

liverlips

Jan 1, 1970
0
I have a stop watch that has a LCD screen witch I would like to
increase the size for easier viewing. The stop watch uses a LR44
1.5vdc button battery. On the board that makes contact with the LCD
are a number of contacts/pads. Along the bottom are 15 contact points
and along the top are 12. The 12 are spaced the same as the bottom
but
obviously have missing pads. Looking at the board, from left to
right,
there are 6 contacts a space (missing contact point) 1, space, 2,
space 3. I don't much about the LCDs , so I don't even know if this
info is helpful in determining the use of a lager one.


I bought and buildt a working display through Furturlec awhile back
and am not sure if it would work with this application. The specs are
as follows:


3.5 Digit LCD Display Module
This simple to build and operate 3.5 Digit LCD Module, is ideal as a
display for many parameters, including voltage, current, temperature,
pressure etc. It accepts a single-ended input, so is ideal to fit
into
a larger system requiring a display function. Input voltage extends
down to -2.0V and up to +2.0V, for a display of -1999 and +1999
respectively. Decimal points and "LO BAT" indication can be easily
turned on through a +5V supplied to the digital inputs for these
points. The module operates from a single +5V supply and no negative
supply is required. A backlight can also be fitted and installed as
required. (Please Note: The backlight is not included in the standard
kit, but can be purchased separately). Detailed instructions are
included.
Features
· Operates from a Single +5V Supply
· Suitable for Single-Ended Input
· Input Range: -2.0V - +2.0V


There are 40 pin on the display that go into the board 10 on top and
10 on bottom. I'm still looking for the directions that they sent me.
Would this work? If so, how would I need to hook it up. (I'm very
familiar with reading schematics). If not, is there anything else out
there that would or is this way to much work or impossible to do?
Any information would surely be appreciated.


Thanks,
DaveK
 
G

Gary Tait

Jan 1, 1970
0
I have a stop watch that has a LCD screen witch I would like to
increase the size for easier viewing. The stop watch uses a LR44
1.5vdc button battery. On the board that makes contact with the LCD
are a number of contacts/pads. Along the bottom are 15 contact points
and along the top are 12. The 12 are spaced the same as the bottom
but
obviously have missing pads. Looking at the board, from left to
right,
there are 6 contacts a space (missing contact point) 1, space, 2,
space 3. I don't much about the LCDs , so I don't even know if this
info is helpful in determining the use of a lager one.


I bought and buildt a working display through Furturlec awhile back
and am not sure if it would work with this application. The specs are
as follows:


3.5 Digit LCD Display Module
This simple to build and operate 3.5 Digit LCD Module, is ideal as a
display for many parameters, including voltage, current, temperature,
pressure etc. It accepts a single-ended input, so is ideal to fit
into
a larger system requiring a display function. Input voltage extends
down to -2.0V and up to +2.0V, for a display of -1999 and +1999
respectively. Decimal points and "LO BAT" indication can be easily
turned on through a +5V supplied to the digital inputs for these
points. The module operates from a single +5V supply and no negative
supply is required. A backlight can also be fitted and installed as
required. (Please Note: The backlight is not included in the standard
kit, but can be purchased separately). Detailed instructions are
included.
Features
· Operates from a Single +5V Supply
· Suitable for Single-Ended Input
· Input Range: -2.0V - +2.0V


There are 40 pin on the display that go into the board 10 on top and
10 on bottom. I'm still looking for the directions that they sent me.
Would this work? If so, how would I need to hook it up. (I'm very
familiar with reading schematics). If not, is there anything else out
there that would or is this way to much work or impossible to do?
Any information would surely be appreciated.


Thanks,
DaveK

You can't, at least without more work than it would be to make a new
stopwatch controller compatible with the bigger display, or find a
bigger stopwatch.

Your original stopwatch uses a multiplexed display, the big LCD isn't,
or if it is, is likely multiplexed differently. Thats the main reason.
 
L

liverlips

Jan 1, 1970
0
@z24g2000prh.googlegroups.com:










You can't, at least without more work than it would be to make a new
stopwatch controller compatible with the bigger display, or find a
bigger stopwatch.

Your original stopwatch uses a multiplexed display, the big LCD isn't,
or if it is, is likely multiplexed differently. Thats the main reason.- Hide quoted text -

- Show quoted text -

Thank you so much for info, it was very helpful
 
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