Hi there,
I had old cd play which was not working so I decided to open it up to see what parts I can scrap for further use. It has LCD display(Like in digital watch) which shows playing time, play, pause etc. I think I can use that display with arduino to show some info or make digital clock. Below are the images of LCD display attached to PCB.
Cable which was connected to the CD player PCB. The other cable is power cable for LCD Backlight.
More images.
Behind main LCD '1402G-8.8V' is wriiten so I connected a 9v battery randomly to pins of LCD I looks something like below.
I hope it can be used with arduino.
If anyone has ever used this kind of LCD before or know how it work and use it with arduino please let me know.
I would greatly appreciate any help you can give me in working this problem
alivebj:
Hello Paul__B. I searched for each numbers written on that PCB or display; I didn't found anything
And that means there is no information available.
Sadly, this is the reality of "disposable" consumer appliances - proprietary code and custom chips (also known as ASICs) whose design is privy only to the engineering department of the manufacturer who have no intention whatsoever of making it available. Why would they?
"Hacking" it is a multi-faceted process consisting of identifying which wires correspond to power for a start - and note that you cannot connect anything to the LCD itself (that will damage it) - and determine what voltages were used to power the display board. Next you need to "sniff" the data sent to the board when the device was in its original form. If it was not working, you need to fix it to the extent that the display shows some data in order to sniff and match up that data.
Note that it bears little or no similarity to the displays commonly used with Arduinox, so it is not a matter of simply trying some library.
All in all, a very ambitious project. As Kostli suggests, better just to go and buy some of the readily usable alphanumeric displays from eBay.
I always try to use any part of a dead electronics in some way; it doesn't feel right throwing away fully functional components or parts. It was an old cd player and only laser was not working. Rest every part of cd player is working fine like power supply, processing unit, motors etc. I found info for almost all components of cd player. I will still try to find a way to use that display. I also have one fully functional china phone colour lcd display. I am also trying to find a way to use that display in some way in my project. I hope I will find a way. Thank you Kostli and Pual__B for you time
Well, then the only way you will be able to use the display (and it's controller) is to connect up a logic analyser to the data pins and record what goes on when the host (the CD-player) is writing to the display driver. From this you can deduct how it works, and can be reused.
Also connecting up a 9V battery between two pins on the LCD glass is surely not a good idea - you may have destroyed the display controller by doing this, and doing this for several minutes will destroy the glass, too.
Hi alivebj
Did you find a way to use that display yet?
I am planning to do it myself. Any help would be appreciated.
Just trying to read the FLASH memory used to drive this display mounted on the motherboard.
iamvivektron:
Hi alivebj
Did you find a way to use that display yet?
I am planning to do it myself. Any help would be appreciated.
Just trying to read the FLASH memory used to drive this display mounted on the motherboard.
No. No one found a way to drive it' It's a custom display and the only way you would be able to use it, would be to connect up a logic analyzer and sniff the communication to document it and write your own code.
Products like CD-players use custom displays and documentation is not usually available in the public segment.
