reverse engineering lcd display quotation

I"ve got a custom segment style LCD that I need to have made by another vendor and do not have the original documentation for. I have already done some initial RE and know the bias type (1/4 multiplexed) and have a partial pinout for the 4 common pins. What I need next is the segment pin map (schematic) so that I can finish the drawings needed to have the display made.

Another thought was to de-laminate the two glass sections to see if I could generate the schematic that way. I only have one display and don"t want to ruin my chance of mapping this one.

The display is driven by a PIC with a built-in LCD controller. I don"t have the source code for the PIC so can"t go about it that way. The product that uses this display has been in production for years and there is no chance of altering the LCD"s pinout at this point or changing the firmware.

The current marketplace allows hobbyists to easily find inexpensive, well-documented displays, but what if you wanted to interface with something more complicated, such as the screen on an iPod Nano 6? [Mike] has given us a detailed and insightful video showing his process for reverse engineering a device with little-to-no documentation. Here he covers the initial investigation, where one scours the web in search of any available information. In [Mike’s] example, the display uses an MIPI D-PHY interface, which he has never worked with. He learns that the MIPI Alliance will provide design specs in exchange for a signed NDA (Non-Disclosure Agreement) and a modest $8000 fee. Nice.

[Mike] shows off some serious hardware hackery, tackling some extremely difficult soldering in order to set up a proper test platform. He then demonstrates how to use a rather awesome oscilloscope to better understand the display protocol. We found it fascinating to see the video signals displayed as waveforms, especially when he shows how it is possible to count the individual binary values. The amount of information he uncovers with the oscilloscope is nothing short of amazing, proving these little devices are more complex than they seem.

I trying to reverse engineer an LCD module with no useful markings (datasheets etc). It is for sure a 128 X 64 LCD matrix of some sort, as I counted the dots in a closeup picture of a working one.

The LCD display module is fed by a ROLAND R8A02021ABG, but I do not have the schematic for this particular unit. What I do have is a schematic for another Roland unit (integra 7) that uses the same R8A02021ABG. In this schematic I can see that there looks to be 18 pins that feed the LCD display of that unit.

Next check the display response by changing the signal inputs and recording the response. You don’t need to record everything the display does just if it changes or not and if the display goes out. Since Pin 1 is negative voltage and no signal, and pin two is 0 voltage and no signal we can assume they are Vss. and ground.

Pin 3 and 4 are fixed high so start with Pin 5 checking one pin at a time, fix the voltage too high, or in this case 2.3 volts and observe what happens to the display.

Record the response of pin 5 then move to Pin 6 fixing it to high then observe the response on the display and record it. Continue with this process for pin 7 and pin 8. The changes on the display were funky symbols in the alphanumeric segments and random lighting up of the custom bar. You may notice the response only affects the custom bar or the alphanumeric bars make note of that because the pin data inputs may be bar specific.

Starting with Pin 3 start checking one pin at a time, fix the voltage to low or in this case 0 volts and observe what happens to the display. Pin 3 and 4 when set low shut down the display, pins 5 to 8 when set to low or 0 volts made different symbols in the alphanumeric segments, and different random lighting up of the symbols in the custom bar.

Many of us have laptops, palms, and other devices which have LCD screens which are still useful, but the devices may no longer function properlly. How would one go about reverse engineering a LCD screen to get it to work with a computer that has an Svideo port, or something like that ? Would it also be possible to buy LCD screens from surplus stores, and use them as your display monitors as well ?

Thank you

Ocular LCD Displays is the latest LCD supplier to pull out of the display market. Consequently, we have been contacted by people asking us for replacement displays once supplied by Ocular USA Displays.

Ocular LCD Displays has moved towards chapter 7. They were located in Texas and began business in 1986. It looks like they ceased delivering displays in mid-November of 2014.

Focus Displays Solutions has been in the LCD business for over fourteen years, in that time we have focused on custom LCDs and replacement LCDs for Ocular USA, Seiko LCDs and Standish Displays.

We not only sell replacement displays, but offer US-based technical support to provide quick responses and US-based inventory. In many cases we can ship you samples the same day you call.

This is not only true for discontinued Ocular LCD Displays, but for LCD suppliers that are still in business, but have discontinued a specific LCD product line.

Whether the LCD has been discontinued by Ocular LCD Displays, Seiko, Standish or other LCD suppliers, Focus Displays has been carrying inventory and offering reverse engineering support to help customers quickly located inventory for their display.

Our technical support people may be able to offer an off-the-shelf standard display with a short lead-time or even zero lead-time. If your Ocular LCD display was a custom, we are able to design and build a solution from your data sheets or from an actual display module.

Focus Displays holds inventory in our Chandler, AZ warehouse and can offer many equivalent displays from stock. If it is necessary for Focus to build a prototype sample, all the LCD glass is shipped via fed ex air, so lead times for large orders are a few weeks and not a few months.

Discovering that your current LCD display manufacture has discontinued your LCD Display is never a welcome surprise. Without a drop in equivalent LCD module you may have to discontinue manufacturing or re-design your product to integrate a new LCD replacement. This can be a frustrating experience, very expensive and time-consuming.

The first step is for the customer to contact Focus Displays at 480-503-4295 and send the data sheets for the LCD that you were using. If you do not have a current data sheet or there is a concern that it may not be accurate, Focus may be able to ‘estimate’ a cost from a photo.

If you are not able to supply a data sheet from Ocular LCD Displays and we are not able to locate it, then the next option is to reverse engineer the display. This is where you would send us two displays (these can be non-working) units that we can take apart and create a schematic and electrical characteristics

Below is our process flow chart to explain the steps necessary to move from concept to full production. More details on developing a custom LCD can be located at

Once a LCD supplier discontinues a display, they tend to remove any documentation from their web site. This lack of data sheets increase the amount of work and lead-time required to generate a quote and build samples. In some cases the old LCD supplier has been purchased by another company and much of their documentation is missing.

If you find that your current module supplier has discontinued your display, contact us for support to help you locate a replacement LCD display. We may have old documentation to reduce your lead-time of locating an equivalent display.

If your displays are custom Ocular LCD displays or it is not a standard off-the-shelf display that we hold in inventory, a tooling fee may be necessary. The tooling fee, also called a NRE (Non-Recurring Engineering), is one-time cost that can run anywhere from $500 to $5,000 dollars.

If you pay the tooling fee, then you own the design. We will only sell this display to you or to who you authorize. If another customer contacts us for the same display, we would forward that customer to you or Focus will contact you and notify you there is a customer looking for your custom LCD.

In the past we have tooled up replacement displays and then directed future business to that customer. The customer that paid us the tooling fee can then purchase the displays from us and resell them to another customer.

In some cases, a second customer will offer to repay half of the tooling cost to the first customer for the rights to purchase the display from Focus.

There have been times when a customer required a replacement display and we felt that this would be a popular display for us to hold in our inventory and sell to our LCD customers.

Will I be able to order samples to test before I need to place a large production order? The answer is yes, when you pay the one-time tooling cost for the Ocular replacement display, we offer samples at no cost.

Many times the customer does not require the replacement display for a product they are still manufacturing, but for repairs. Many products, such as cell phones, credit card readers and test equipment will be in the field for several years after production has ended and will require spare units.

Since Focus Displays is building an equivalent display to fill your shortage, why not make improvements on the design? Improvements in LCD technology allow for upgrades such as: Brighter backlights, wider viewing angle, sharper contrast and even lower operating voltages.

Speak to one of our LCD specialist to determine the best solution for you. If need be, we can sell you a display with the brighter backlight configuration for you to test and show your end customer.

DISADVANTAGES OF EL BACKLIGHTS INCLUDEEL backlights require an AC (Alternating current) signal. To generate an AC signal, an inverter must be installed either on the customers board or on the LCD itself.

The popularity of EL Backlights has decreased in the last few years. Over 95% of new product designs no longer incorporate an EL backlight, but instead choose a LED backlight or LED edge-lit configuration. Many products needing a replacement display were manufactured several years ago when EL backlights were common. Your Ocular LCD displays may contain an EL backlight. Many LCD suppliers no longer support EL backlight technology. Focus Displays is able to supply EL backlights, although the MOQ at this time is between 500 and 1K units.

In the past, older LCD technology was limited to a smaller operating temperate range. New types of Nematic fluids and ITO (Indium tin oxide) glass now allow many displays to operate as low as -30C. We are able to offer these wider temperature ranges with minimal cost increase. In many cases, the LCDs we sell are the wide temperature range. There is no extra NRE cost to convert from a standard temperature display to a wide temperature. If your Ocular LCD displays were used in a product that operates outside, we recommend a wide temp. If the product is used indoors, it is possible to use normal temperature. If you do not know where the product operates, we recommend a wide temperature version.

Older LCD technologies were limited in backlight color to yellow/green. Now there is a much wider selection. You can choose a new backlight color to be integrated into your display with minimal or no extra cost. Below are photos showing the different backlight colors. The two most popular colors are Blue/White and Black/White. Additional colors include: yellow/green, grey, blue, white, red, orange, pure green, amber and others.

16X2 ALPHANUMERIC LCD, TRANSFLECTIVE (WORKS WITH OR WITHOUT THE BACKLIGHT), AMBER SIDE-LIT BACKLIGHT, FSTN, WIDE TEMP, BOTTOM VIEW (6:00), POSITIVE MODE

16X2 ALPHA-NUMERIC LCD, TRANSFLECTIVE (WORKS WITH OR WITHOUT THE BACKLIGHT), PURE GREEN SIDE-LIT BACKLIGHT, STN GREY, BOTTOM VIEW (6:00), POSITIVE MODE

16X2 ALPHANUMERIC LCD DISPLAY, TRANSFLECTIVE (WORKS WITH OR WITHOUT THE BACKLIGHT), WHITE LED SIDE-LIT BACKLIGHT, FSTN, BOTTOM VIEW (6:00), POSITIVE MODE

Focus Displays is able to help reduce or remove hotspots on your older discontinued LCD module by using new diffuser technology, or decreasing the brightness and increasing the quantity of LEDs.

The majority of LCD technologies require an onboard controller driver to be attached to the display. The exception to this is a segmented display that is interfaced with a 4:1 multiplex or direct drive.

Our goal in working to replace your Ocular LCD displays, or any discontinued LCD, is to provide you the same controller driver chip. If the chip on the replacement display is the same as the chip used on your discontinued display, your firmware (aka the customer’s software) will run fine and the characters and fonts will display correctly.

If the new controller is different than the controller used on your Ocular LCD displays, you may need to modify your firmware. When designing the replacement display, we ask the customer to contact their current supplier to clarify which controller chip was used, but if your supplier has discontinued manufacturing of displays, this will not be possible.In this case, send us two of the displays and we will be able to identify which controller was used. If the new controller chip does not work and you are in need of assistance to modify your software, contact Focus Displays and we can put you in touch with a design house that specializes in this type of work.

Focus Display Solutions specializes in supplying replacement LCD Displays for discontinued and obsoleted LCD Display modules. Many times we will have an equivalent display in stock and can sell it to you that day. Other times, we will need to dig deeper to design a custom solution. In either case, our technical support people will work to sell you a display that will meet your needs.

Reverse engineering is generally known as the process of taking a finished product and disassembling it to discover the methods of its construction. AccuTrex uses a version of this process to quickly recreate projects involving broken parts, samples, or to simply add a part into a plan that doesn’t have a corresponding DWG file. We require the customer to advise what the material is.

At AccuTrex, we utilize the InspecVision 2D P150.40 for our reverse engineering needs. This fast 2D measurement system simplifies the measurement process by employing very high resolution cameras to scan and measure parts placed inside. These cameras then yield a detailed and comprehensive computer readout (DWG) file of the product, allowing AccuTrex to recreate it in its entirety.

By using the InspecVision, AccuTrex is capable of reverse engineering all 2D physical parts, including components created out of any type of metal, synthetic, gasket material, or plastic to quickly create accurate and detailed CAD files for samples and parts without a drawing. The system’s “unfolding software” enables us to reverse engineer parts that may be bent, such as boxes or an angled part.

AccuTrex’s reverse engineering capabilities with the InspecVision P150.40 allow us to reverse engineer old parts from machines that have been discontinued. In projects where procuring a necessary yet non-existent part can introduce a significant level of complexity, AccuTrex’s ability to quickly and accurately scan and produce reliable replacement parts is an asset.

Once the reverse engineering process is completed, the output drawing may still need to be tweaked, finished, improved and approved by their customers.

At 11 June 2013, 13:42:13 user Allan wrote: [reply @ Allan]Very interesting. Thanks for taking time to make these videos. What exactly does your breadboard circuit do in order to shift (scroll) to the next scan line on the LCD ?

At 24 August 2012, 7:22:43 user Giorgos Lazaridis wrote: [reply @ Giorgos Lazaridis]@kiranvarma-npeducations which software do you mean? The PIC software? It is very messy and i made it only for testing the LCD. If this is what you want, i can certainly give it to you. But it is not commented.

At 3 July 2012, 8:36:44 user kiranvarma-npeducations wrote: [reply @ kiranvarma-npeducations]Is that software shown in video is designed by you, its cool! simply generating binary code for bitmap images and serializing.. to LCD panel via some controller (i think from Philips). Which language that u have used to develop software. Final output in LCD panel is mind blowing, you are genius in both software and hardware part. Really amazing video, really reverse engineering. Thanks for such wonderful project tutorial. I will bookmark your site for my learning benefit

At 6 May 2012, 20:31:17 user Giorgos Lazaridis wrote: [reply @ Giorgos Lazaridis]@sdfdsfadsjk But first i will finish my coffee maker for which this LCD is supposed to go. But due to lack of funds, the project will be delayed for a while.

At 21 November 2011, 5:41:30 user Kammenos wrote: [reply @ Kammenos]@Annonymois sure there are methods for this, but not by hacking the LCD that way. There are programs for example for PCs and others for telephones to do this, there are also very VERY cheap gadgets (http://www.ebay.com/sch/?_kw=gsm%20spy&_clu=2&_fcid=5&_localstpos=&_sop=15&_stpos=&gbr=1). If i were you, i would start with a simple PC format, and then install a firewall on the PC. Any surveillance program installed would then be erased.

At 20 November 2011, 22:10:52 user Annonymois wrote: [reply @ Annonymois]Hi. I saw your YouTube video about reverse engineering an LCD screen. And some posters had said this process is used by hackers in order to spy on people through their computer screens? And I started googling this questions because I perceive I am being watched by people I know. I don"t know how. I suspect there is a website where the hackers stream the audio and visuals to the recipients who include friends and so-called family members. They drop subtle hints to me as to the fact they they know what I"m doing by posting comments on YouTube videos I"ve just watched or they repeat the words I"ve just spoken by writing it down on my Facebook wall or in my junk email subject line. If you google gang stalking, cause stalking, gas lighting, you will see that there are a lot of people who are experiencing electronic surveillance. It"s crazy. I know I saw a real life police show once and they were receiving visual feed from the cell phone of a criminal. I don"t know how they did it. But I have been abused by people I know at work and in the last year by my own family because they used to like / love me and now they hate me. My brothers family in particular and my nephew from my sister have been befriended by these cause stalkers and they constantly let me know I"m being watched. They don"t admit it but I"ve heard them talk about private conversations I"ve had when they were no where near me! It"s crazy.

I finally got my display working! It"s only 160x80 so I can get great refresh rates from a pic... right now the controller is an 18f2455 and i"m using it"s internal ram for the display. Currently it only displays a test image that I stored in program memory, but I plan to add a 5x7 font, a gal for timing logic, external serial display ram, and serial character input... then I"ll use it for console output on a couple of hacked linux devices. Thanks for all the information!!

I have obtained a large (200-300) lot of bare LCD Screens (no driver/controller boards). About half of them are 3.8" Sharp LQ038 screens. These were stored loose in a box and many are obviously broken. I would like to do something with these and I am at this point looking for a simple circuit so that I can test them, also possibly a way to turn them into digital photo frames. I am an Electrical Engineer, but it has been a while since I have done detailed component work like this and I have never worked with Color LCD displays before. Can someone direct me to where I can find some circuit designs that I may be able to use?

At 2 August 2011, 18:30:42 user Tom wrote: [reply @ Tom]Just recently got back to my lcd project... The M signal is to drive the LCD voltages: the col/seg drivers use it to alternate the voltage applied to the cells, otherwise the lifespan is shortened. The pic simply alternates M from high to low every frame.

My lcd is only 160x80, and I"ve generated a test image with a pic18f2455... I"m only running at 20MHz right now but the refresh rate is good because it"s a much smaller screen. Thanks again!!

At 12 April 2011, 21:00:08 user jparker wrote: [reply @ jparker]You are very good at debugging (reverse engineering). I like your honesty when you talk about your projects/experiments. You also inspire me to explore some of my broken devices parts. Hang on to the curiosity you have and it will be kind to you in the future I"m sure. Thx for the website.....

My first monochrome LCD, like yours, didn"t have a smart controlle, I put the LC7981 controller on it and it worked. My second monochrome LCD was this:

I had to do a change there. It"s been a long time and I don"t remember but here is bottom line: The SED1335 supports a 16 bit address bus and the memory on this LCD is only 8 kBytes. I found an 32 kBytes RAM with the same layout as the 8 kBytes. The difference was that the 8 kBytes RAM had two NC lines in the place of the two extra address lines on the 32 kBytes RAM. So, I replaced the RAM, hardwired the NC pins to the correct SED1335 pins and it worked perfectly :)

At 27 March 2011, 21:10:58 user Tom wrote: [reply @ Tom]Nice work! You gave me the idea to work on my own 160x80 lcd which has the same common and segment driver. Two questions if you don"t mind...

2. what is the M pin (pin 94 on the 79430 and pin 86 on the 79401) on your lcd connected to? i have a pin on my connector that goes to M on the drivers and i"m not sure what to do with it... the specs say M is an input - "LCD drive output alternating current (AC) signal"

You can have a 32MHz INTOSC (8MHz with 4x PLL; see section 5.2.2.6 of the 16F1934 data sheet). You can also use the MSSP to fetch bytes from the external memory for you at one bit per CPU cycle while sending the previous byte to the LCD, or get display data from internal program memory or even RAM instead.

Of more interest is that with small changes you can store tiles in program memory for easy character display. It is slightly slower, but can (barely) achieve 50Hz screen refresh with a fully tile-based screen layout. For example, code to choose among 64 tiles, 16x16 pixels in size (2kword program memory), might look like:

MCUs are used as the main control element in just about every application imaginable. Their power and flexibility make them the go-to component at the heart of most designs. Since it is important to make sure that your design cannot be easily copied, reverse engineered or tampered with, modern MCUs now provide a few different options for protecting your design; a good understanding of the capabilities and trade-offs are important in order to determine which approach is best for a given design.

Just as vulnerable is the actual design or algorithm hidden in the heart of your MCU code. Perhaps you have an innovative approach to analyzing sensor data that dramatically reduces the power or processing time required. Do you want a competitor to be able to just copy your code and reverse engineer your algorithm? There are even software tools that can take binary and regenerate reasonable “C” code so that the algorithmic details are even easier to decipher. Even something as mundane as an on-board test routine may have taken many months to get just right — do you want a competitor to get short-cut access to your infrastructure related code, dramatically reducing their development cost so they can unfairly cut their market price to win your business?

So, it should now be clear that in many cases it is important to be able to protect your hardware from copying, reverse engineering, and from counterfeiting. Furthermore, without secure hardware as a starting point, it would be impossible to create the variety of secure devices needed in applications like the connected home (Figure 1).

Perhaps the most common technique for protecting hardware from copying is to program an MCU in a One-Time-Programmable (OTP) mode where the programmed data cannot be accessed from outside the device. JTAG and debug facilities must be turned off so that data cannot be accessed using a debug “backdoor.” Modern designs find the OTP approach very limiting, however, since debugging is a useful feature during failure analysis and in-field testing. Another important capability the OTP approach eliminates is remote updates to on-chip MCU code for upgrades, bug fixes, and other similar changes needed to improve operating integrity or quality of service. Ideally we would want to protect our code from reverse engineering and copying, but still be able to easily make updates and changes.

In summary, protecting your design from reverse engineering and hacking is now possible when using advanced security capabilities available to modern MCUs and a variety of supporting devices. Protecting networked-embedded systems is particularly critical as the occurrences of networked-based attacks against embedded systems continue to grow.

PCB Reverse engineering can also be used to fill in partial data gaps in a circuit assembly data package. For example, if you only have a bill of materials and a physical PCB, ScanCAD can use the board to generate the bare board design data and a schematic.

ScanCAD uses two main methods of reverse engineering PCBs. The first method is a proprietary milling and imaging process that captures high resolution, NIST-calibrated images of each circuit layer on the PCB. The vector or Gerber data is then reconstructed using these images. The gerber data generated in this process serves as the backbone for the rest of the project, allowing us to generate component Pick and Place/Centroid Data, Netlist and Schematic data. This process yields exact copper geometries and identically matches the original PCB’s form, fit and function down to the mil — for every single layer, even inner layers.

The second way we reverse engineer PCBs is a non-destructive method involving the use of Flying Probe Test (FPT) machines for connectivity-only reverse engineering. In this method, the PCB must be depopulated (and loses its functionality) but the bare board is not destroyed. Additionally this method does not allow us to capture inner copper geometries.

Reverse Engineer An Lcd Display Its Alive Part 1 Of 3 . Welcome to my blog about Reverse Engineer An Lcd Display Its Alive Part 1 Of 3, where I explore the many different facets of this fascinating subject. As a Reverse Engineer An Lcd Display Its Alive Part 1 Of 3 enthusiast, I"m excited to share with you my knowledge, experiences, and insights about this field. Whether you"re an expert or a beginner, my goal is to provide you with engaging and thought-provoking content that will deepen your understanding and appreciation of Reverse Engineer An Lcd Display Its Alive Part 1 Of 3. Through a mix of articles, videos, and other resources, I"ll cover topics such as content, and more, so that you can discover the latest developments and trends in the world of Reverse Engineer An Lcd Display Its Alive Part 1 Of 3. My hope is that this blog will become a place for us to connect, share our ideas, and explore the many wonders of Reverse Engineer An Lcd Display Its Alive Part 1 Of 3 together. Thank you for joining me on this journey, and I look forward to hearing your feedback and ideas in the comments section Webdec 3 2022 re reverse engineering firmware for lcd screen- there are all sorts of lcds which can be controlled by serial data- there are also bigger tft modules with integrated usd connector on which you can load an usd card with pictures and then these are contolled by a single uart- these usually are bundled with pc software to create -

Reverse engineer an lcd display its alive! [part 1 of 3] link to page: pcbheaven exppages reverse engineering an lcd displayreverse engineering an lcd display. Reverse engineering an lcd display 31 comments by: phillip ryals december 14, 2013 the current marketplace allows hobbyists to easily find inexpensive, well documented displays, but what if you. Over at dorkbotpdx in portland, a member showed up with a stack of large lcd displays from point of sale terminals. [paul] took it upon himself to reverse engineer the displays so that they. Link to page: pcbheaven exppages reverse engineering an lcd displaythis is the third and last video of reverse engineering an lcd display (320x220. It is for sure a 128 x 64 lcd matrix of some sort, as i counted the dots in a closeup picture of a working one. there are 12 pins on the cable going into the lcd display module. the backlight is a separate thing. the lcd display module is fed by a roland r8a02021abg, but i do not have the schematic for this particular unit.

Starting with pin 3 start checking one pin at a time, fix the voltage to low or in this case 0 volts and observe what happens to the display. pin 3 and 4 when set low shut down the display, pins 5 to 8 when set to low or 0 volts made different symbols in the alphanumeric segments, and different random lighting up of the symbols in the custom bar. The m signal is to drive the lcd voltages: the col seg drivers use it to alternate the voltage applied to the cells, otherwise the lifespan is shortened. the pic simply alternates m from high to low every frame. my lcd is only 160x80, and i"ve generated a test image with a pic18f2455. Re: reverse engineering firmware for lcd screen. there are all sorts of lcd"s which can be controlled by serial data. there are also bigger tft modules with integrated usd connector on which you can load an usd card with pictures, and then these are contolled by a single uart. these usually are bundled with pc software to create pictures for.

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link to page: pcbheaven exppages reverse engineering an lcd display reverse engineering an lcd display we start reverse engineering and lcd from a gameboy advance by identifying the power rails. link to page: pcbheaven exppages reverse engineering an lcd display this is the second video of an update to the lcd series. i have identified the power pins for the horizontal chips. the first of my 3 part series on reverse engineering and re purposing and re cycling an hp officejet printer touch screen display in this video we show how we reverse engineer a pager from taking it apart to finding the data sheet to probing the device for link to page: pcbheaven exppages reverse engineering an lcd display this is the third and last video of support this channel on patreon patreon 8bitguy1 visit my website: the8bitguy in this episode i take a in this video, i reverse engineered an lcd from a uniden cordless phone. for technical details and arduino code, please take a