36 pin lcd display pinout quotation

36 pin lcd display provide the touch interface in smartphones, which are vital for them to function. Alibaba.com stocks a stunning range of high-tech 36 pin lcd display with vibrant color depictions. Truly crystal-clear displays of 36 pin lcd display are available covering various brands and models such as the Samsung Galaxy Edge 2, OnePlus 7T, Samsung Galaxy C5, and many more.

36 pin lcd display are the most commonly used displays, as they produce great image quality while consuming low power. Rather than emitting light directly, they use back lights or reflectors to produce images, which allows for easy readability even under direct sunlight. 36 pin lcd display are energy-efficient, and are comparatively safer to dispose of, than CRTs. 36 pin lcd display are much more efficient when it comes to usage in battery-powered electronic equipment, due to their minimal power consumption.

Some other advantages of 36 pin lcd display over the CRT counterparts are - sharper images, little to no heat emission, unaffected by magnetic fields, narrow frame borders, and extreme compactness, which make them very thin and light. Some types of 36 pin lcd display are transmissive, reflective, and transflective displays. Transmissive displays provide better image quality in the presence of low or medium-light, while reflective displays work best in the presence of bright light. The third type of 36 pin lcd display, transflective, combine the best features of both the other types and provide a well-balanced display.

Whether as an individual purchaser, supplier or wholesaler, browse for an extensive spectrum of 36 pin lcd display at Alibaba.com if you don"t want to stretch a dollar yet find the best fit.

In this tutorial, I’ll explain how to set up an LCD on an Arduino and show you all the different ways you can program it. I’ll show you how to print text, scroll text, make custom characters, blink text, and position text. They’re great for any project that outputs data, and they can make your project a lot more interesting and interactive.

The display I’m using is a 16×2 LCD display that I bought for about $5. You may be wondering why it’s called a 16×2 LCD. The part 16×2 means that the LCD has 2 lines, and can display 16 characters per line. Therefore, a 16×2 LCD screen can display up to 32 characters at once. It is possible to display more than 32 characters with scrolling though.

The code in this article is written for LCD’s that use the standard Hitachi HD44780 driver. If your LCD has 16 pins, then it probably has the Hitachi HD44780 driver. These displays can be wired in either 4 bit mode or 8 bit mode. Wiring the LCD in 4 bit mode is usually preferred since it uses four less wires than 8 bit mode. In practice, there isn’t a noticeable difference in performance between the two modes. In this tutorial, I’ll connect the LCD in 4 bit mode.

Here’s a diagram of the pins on the LCD I’m using. The connections from each pin to the Arduino will be the same, but your pins might be arranged differently on the LCD. Be sure to check the datasheet or look for labels on your particular LCD:

Also, you might need to solder a 16 pin header to your LCD before connecting it to a breadboard. Follow the diagram below to wire the LCD to your Arduino:

There are 19 different functions in the LiquidCrystal library available for us to use. These functions do things like change the position of the text, move text across the screen, or make the display turn on or off. What follows is a short description of each function, and how to use it in a program.

TheLiquidCrystal() function sets the pins the Arduino uses to connect to the LCD. You can use any of the Arduino’s digital pins to control the LCD. Just put the Arduino pin numbers inside the parentheses in this order:

This function sets the dimensions of the LCD. It needs to be placed before any other LiquidCrystal function in the void setup() section of the program. The number of rows and columns are specified as lcd.begin(columns, rows). For a 16×2 LCD, you would use lcd.begin(16, 2), and for a 20×4 LCD you would use lcd.begin(20, 4).

This function clears any text or data already displayed on the LCD. If you use lcd.clear() with lcd.print() and the delay() function in the void loop() section, you can make a simple blinking text program:

Similar, but more useful than lcd.home() is lcd.setCursor(). This function places the cursor (and any printed text) at any position on the screen. It can be used in the void setup() or void loop() section of your program.

The cursor position is defined with lcd.setCursor(column, row). The column and row coordinates start from zero (0-15 and 0-1 respectively). For example, using lcd.setCursor(2, 1) in the void setup() section of the “hello, world!” program above prints “hello, world!” to the lower line and shifts it to the right two spaces:

You can use this function to write different types of data to the LCD, for example the reading from a temperature sensor, or the coordinates from a GPS module. You can also use it to print custom characters that you create yourself (more on this below). Use lcd.write() in the void setup() or void loop() section of your program.

The function lcd.noCursor() turns the cursor off. lcd.cursor() and lcd.noCursor() can be used together in the void loop() section to make a blinking cursor similar to what you see in many text input fields:

Cursors can be placed anywhere on the screen with the lcd.setCursor() function. This code places a blinking cursor directly below the exclamation point in “hello, world!”:

This function creates a block style cursor that blinks on and off at approximately 500 milliseconds per cycle. Use it in the void loop() section. The function lcd.noBlink() disables the blinking block cursor.

This function turns on any text or cursors that have been printed to the LCD screen. The function lcd.noDisplay() turns off any text or cursors printed to the LCD, without clearing it from the LCD’s memory.

This function takes anything printed to the LCD and moves it to the left. It should be used in the void loop() section with a delay command following it. The function will move the text 40 spaces to the left before it loops back to the first character. This code moves the “hello, world!” text to the left, at a rate of one second per character:

Like the lcd.scrollDisplay() functions, the text can be up to 40 characters in length before repeating. At first glance, this function seems less useful than the lcd.scrollDisplay() functions, but it can be very useful for creating animations with custom characters.

lcd.noAutoscroll() turns the lcd.autoscroll() function off. Use this function before or after lcd.autoscroll() in the void loop() section to create sequences of scrolling text or animations.

This function sets the direction that text is printed to the screen. The default mode is from left to right using the command lcd.leftToRight(), but you may find some cases where it’s useful to output text in the reverse direction:

This code prints the “hello, world!” text as “!dlrow ,olleh”. Unless you specify the placement of the cursor with lcd.setCursor(), the text will print from the (0, 1) position and only the first character of the string will be visible.

This command allows you to create your own custom characters. Each character of a 16×2 LCD has a 5 pixel width and an 8 pixel height. Up to 8 different custom characters can be defined in a single program. To design your own characters, you’ll need to make a binary matrix of your custom character from an LCD character generator or map it yourself. This code creates a degree symbol (°):

Abstract: how to wire vga to rca jacks RJ45INTLED TD043MTEA1 rca TO VGA pinout CPLD-EPM2210F324 schematic diagram video converter rca to vga schematic diagram vga to composite vga to rca schematic schematic diagram vga to rca cable connector

Text: Connector MAX II HSMC Pin Connector No. Side Pin Signal Name Device Side Pin LCD Touch , 10-bit high-speed video DAC 15- pin high-density D-sub connector The VGA synchronization signals , LCD touchscreen, VGA out, composite video in, audio in/out, microphone in, plus Ethernet, SD-Card, PS , Multimedia HSMC Connector view1 and connector view2 of the LCD Multimedia HSMC is shown in Figure 1­3 and , . LCD Multimedia HSMC Side View 1 RS-232 VGA Out Audio In Composite Video In Audio Out

Abstract: ATI RAGE mobility m1 LVDS connector 30 pins LCD LVDS connector 26 pins LCD SIL164 LVDS connector 32 pins LCD LVDS connector 32 to 20 pins LCD lcd screen LVDS connector 30 pins lcd tv service manual LVDS connector 20 pins LCD

Text: AG MSMVB104+ Manual V1.0B 4.2.2 X5 LCD connector signals The following table provides the pin to pin connection to the the LCD connector X5. The figure with SMD shows the actual pin numbering , .8 2.3.1 VGA / LCD BIOS Support , .13 4.2.2 X5 LCD connector signals , Ordering Information Ordering Information: MSMVB104+ 2.2 VGA controller with CRT, TV-OUT , LCD

Abstract: pin diagram of pentium III PROCESSOR usb to rj45 wiring diagram usb to s-video wiring diagram vga cable to lcd cable diagram SR 9570 via twister t vt8606 VT82c686B S3 SAVAGE4 via vt82c686b PCM-9579F-J0A1E

Text: PCM-9579 SR KB/Mouse ULV Intel® Celeron®, LV Intel Pentium® III SBC with CPU, Audio, VGA / LCD , Pentium® III SBC with CPU, Audio, VGA / LCD and Ethernet ULV Intel Celeron, LV Intel Pentium III 1st , Mode: 1280 x 1024 @ 16 bpp (60 Hz), 1024 x 768 @ 16 bpp (60 Hz) 4X AGP VGA / LCD interface, Support for , -Feb-2007 PCM-9579 Board Diagram Intel ULV processor VGA Connector LVDS Connector DDR DIMM VIA , 422/485 2000 connector connector Slot Solution Temp. MS 512 KB Yes 36 -bit Yes 1 Yes

Abstract: LTM10C209A LTM12C275 Realtek RX2 dc-ac inverter SERVICE MANUAL mda to vga converter PCM-3341 toshiba VGA 30 PIN LCD MONITOR CABLE CONNECTION D vga connector 26 pin lcd to 15 pin lcd 3i bios chip

Text: Backlight connector (CN3) The LCD inverter is connected to CN3 via a 4- pin connector to provide +12 V power to the LCD display. 2.11 VGA connector (CN13) The PCM-3341 board"s SVGA interface can facilitate , CRT display connector (CN13) CN13 is a 16- pin , pin head housing connector . Please use the VGA , board"s connector in Appendix C. 2.17 LCD-B connector (CN11) The PCM-3341 supports 36 -bit LCD that , ) . 13 Backlight connector (CN3) . 13 VGA connector

Text: / External LCD clock . 39 VGA connector , P6 , 20- pin header connector , Pin , connector , P3 ConnectCore 9C and Wi-9C .18 Pin assignment , -232) connector , P9. 36 Serial port C header connector , P10. 37 P10 connector pin assignment . 37 Serial

Abstract: skc24 13 pins vga signal cable UV6-5595 standard 15 pin vga connector MALE TO FEMALE UV635 vga connector hsync 663 lcd inverter 39 PIN TFT DISPLAY skb 14

Text: Data Pack F Issued November 1999 249-4873 Data Sheet TFT LCD Kit Colour TFT LCD kits and monitors (with or without touch screen) RS stock number 249-8780 (10.4in. TFT LCD kit) A fully integrated LCD PC compatible display solution, which incorporates the latest Toshiba 10.4" VGA High Bright , Bus Connector 3 249-4873 Connector 1 Pin allocation Pin Function 1 G4 Green pixel data 2 G3 , Ground (Note 3) Connector 2 Pin allocation Pin Function 1 DTR (comm 1 pin 4) 2 RTS (comm 1 pin 7) 3 TXD

Abstract: crt monitor repair crt monitor vga pin details LM-CA53-22NAZ 1.5 128x128 Color LCD 39 pin 1024k x 8 bits fifo Video Frame j9 smd repair lcd monitor toshiba LQD011 mga to vga connector

Text: Header Pin No. 32 34 36 38 39 31 11 DIGITAL-LOGIC AG 5.2 J4 MSMVGA Manual V1.0 VGA , 15 pins HiDensity DSUB Pin Signal Pin 32 Pin 34 Pin 36 Pin 38 Pin 39 VGA red VGA green , J8 J14 J13 15 J4 - VGA / LCD CONNECTOR 6.2 MSMVGA Manual V1.0 DIGITAL-LOGIC AG , TECHNICAL USER"S MANUAL FOR: PC/104 Peripheral boards MSMVGA 65545 based VGA / LCD controller , .6 3 VGA , LCD

Text: I/O ADDRESSES FOR VGA / LCD , ETHERNET AND COM PORTS .10 4.3 MEMORY ADDRESSES FOR VGA / LCD .10 CONNECTOR , .11 5.2 CRT CONNECTOR PIN DESCRIPTION , LCD controller TOPRO TP6508 with 1MB video RAM · VGA graphics for CRT and flat displays · , See Appendix E: Assembler Program for more information. I/O Addresses for VGA / LCD , Ethernet and COM

Text: . 98 CN10 20- Pin LCD Connector ( 36 -bit). 99 CN11 PC/104+ Connector , 422/485 connector CN7 40- pin LCD port (24bit) CN8 CRT CN9 USB connector CN10 20- Pin LCD connector ( 36 -bit) CN11 PC/104+ connector CN12 44- pin IDE connector CN13 , Hirose connector . It can connect to a 36 -bit TFT LCD panel. Pin assignments appear in the appendix , Connector . 96 CN7 40- Pin LCD Port (24bit

Text: one-to-one adapter can be used to match CN22 to a standard 15pin D-SUB connector commonly used for VGA . Pin , (CN23) CN23 consists of a 40- pin connector which can support a 24-bit LCD panel. It is Hirose , TFT LCD . 2.19.3 Extension flat panel connector (CN18) CN18 consists of a 20- pin connector which is , select. 19 2.19 VGA / LCD /LVDS interface connections . 20 2.19.1 , ) . 20 LVDS LCD panel connector (CN15) . 20 Panel type selection (S1

Abstract: PCA-6751 crt monitor DB9 male connector to DB15 male PCA-6740 vga wires connector 15 pin monitor db25 male pin layout for E1 pca-6135 lynxem intel 8042 keyboard controller dc-ac inverter SERVICE MANUAL

Text: -6740 CN9 is a DB-15 connector for VGA monitor input. Pin assignments for the CRT display are detailed in , PCA-6740 ISA STPC Elite 133 Half-size CPU card with CPU/32MB SDRAM/ VGA / LCD / LAN/DOC/CF/PC104, Connector (CN7) . 19 2.14 VGA display connector (CN9 , Appendix A Pin Assignments. 93 IDE hard drive connector (CN1 , connector (pins 13,15) . 101 LCD Inverter Power (CN8

Text: Status MSMV104+ XVGA PC/104-Plus SMI 710 VGA , LCD PCI 32k BIOS 5V/200mA(typ.) 5V/200mA(typ , . PCCard (2x) POWER VGA Description LCD The MICROSPACE PC/104 MSM486SL/SN/SV integrates all , VGA LPT1 COM1 LCD COM2 Floppy Ordering Information Parallel USB LAN SCSI Audio Video , RS485 - 36 MSMP5SEN/SEV Datasheet VGA MICROSPACE PC/104 Floppy Beschreibung COM2 , ) 69000 with 2 MB CRT Standard LCD TFT/STN Resolution 36 Bit Level 3V/5V (optional) 1k onboard

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Text: card LKA Blue data bit 2 24,34, 36 12 Connector 1 Pin allocation Pin Panel support , monitor. This complete LCD monitor includes the latest 10.4" VGA high bright (250cd/m2) TFT LCD offering , connectors have been provided: q SKE, 26 pin dual-in-line header to accept an IDC ribbon cable connector , ) / / - 5 249-4873 Connector 2 Pin allocation Pin Touch-screen & Aux I/O Function Pin , save LED Drive (Note 5) 5 CTS (comm 1 pin 8) 18 LCD Temp LED Drive (Note 5) 6

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Text: type LCD panels. 2.19.1 CRT display connector (CN8) CN8 is a 16- pin , dual-inline header used for , connector commonly used for VGA . Pin assignments for CRT display connector CN8 are detailed in Appendix C , consists of a 20- pin connector which is Hirose"s product no. DF13A-20DP-1.25V. The PCM-9579 supports a 36 , / LCD /LVDS interface connections. 20 2.19.1CRT display connector , LCD panel connector (CN9) . 20 2.19.5Panel type selection (S1

Text: USB LAN Video ISA, PCI LPT1 none yes 69000, 2 MB, VGA LCD Resolution 36 Bit Level 3V , , VGA LCD Resolution 36 Bit Level 3V none 1k onboard external yes 5V 800mA to 1500mA(typ , well as all control lines are linked to the 320- pin connector . Integration is effected with a , 8 x 16 yes yes yes COM1 (TTL) COM2 (TTL) COM3 (TTL) ISA LPT1 none none 1/4 VGA LCD , yes yes yes COM1 (TTL) COM2 (TTL) COM3 (TTL) ISA LPT1 none yes 65548/550, 1 MB RAM, VGA LCD

Text: Analog RGB Input connector (CN801) Connector : Mini D_Sub 15pin Pin No Symbol Signal Name Pin No , ) Connector : 53015-1410 made by Molex Pin No. 15 14 13 12 11 10 9 8 Symbol RED GREEN BLUE ID2 , Sync. DDC Data Clock CVBS input connector for Composite Video (CN401) Pin No. 1 2 DATA , Red No connection Green On/Off OUTPUT CONNECTORS FOR LCD INTERFACE Pin No 1 2 3 4 5 6 7 , "7 Pin No. CN700 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 B3

Text: .) -25°C to +70°C -40°C to +85°C 90 > 100"000 h MSMV104+ XVGA PC/104-Plus SMI 721 VGA , LCD , TV-IN , (INTEL 82559ER) 69000 with 2 MB CRT Standard LCD TFT/STN Resolution 36 Bit Level 3V/5V , MICROSPACE PC/104 Beschreibung POWER 2 x USB LCD LAN LAN MS, KB VGA IDE Floppy LPT1 , 100/10 BASE-T (INTEL 82559ER) 69030 with 4 MB CRT Standard LCD TFT/STN Resolution 36 Bit Level , Standard LCD TFT/STN Resolution 36 Bit Level 3V/5V (optional) 1k onboard onboard or external yes

Text: commonly used for VGA . Pin assignments for CRT display connector CN16 are detailed in Appendix C , inverter connector (CN8) The LCD inverter is connected to CN8 via a 5- pin connector to provide +12V power , PCA-6773 ISA Intel ULV400,650/LV800, 933 Slot PC, CPU/ VGA / LCD /LVDS/ LAN/CFC and PC/104 User , PC VGA / LCD /LVDS/LAN/CFC/PC104 PCA-6773-MOA1 ISA Celeron ULV650 Slot PC VGA / LCD /LVDS/LAN/CFC/PC104 PCA-6773-R0A1 ISA Intel LV933 Slot PC VGA / LCD /LVDS/2LAN/CFC/PC104 Additional Information

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Text: for LVDS type LCD panels. 2.18.1 CRT display connector (CN21) CN21 is a 16- pin , dual-inline header , standard 15pin D-SUB connector commonly used for VGA . Pin assignments for CRT display connector CN21 are , 3.5" Biscuit SBC Functions. 3 VGA / LCD Interface , port connector (CN20,CN12). 20 2.17.1 COM2 RS-232/422/485 setting ( pin , ) . 21 LVDS LCD panel connector (CN6) . 21 Panel type selection (S1

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Text: COMS LAN Watchdog IrDA KB/MS VGA HDD & PWR LED CPU Fan LCD 2 IDE LVDS TV enable Print Port Inverter Power LCD Power 3.5" SBC with VIA Mark, VGA / LCD / LVDS/ LAN/ USB Features VIA Mark 533/800 MHz , expansion Support 8bit GPIO and hardware Monitor detection LCD 1 Coast line (external connector layout , resolutions up to 1600 x 1200. CRT panel LCD panel Support for 18, 24, 36 -bit TTL TFT LCD panels LVDS , Motherboards Floppy connector VIA VIA Mark VGA connector TTL Panel connector Embedded Box

Text: · · · · · COM2 RS-232/422/485 Keyboard/PS/2 Mouse Connector · · · · 36 bit LCD connector Intel® 82440BX PCI set Power connector TridentTM AGP VGA / LCD controller Introduction , Supports Socket 370 for Intel® CeleronTM processor · AGP 3D VGA / LCD and supports 36 bit XGA TFT LCD Panel , processor up to 500MHz· · · VGA Connector COM1 RS-232 EIDE connector · · USB , , support 8 MB to 256 MB, accepts 8/16/32/64/128 MB Synchronous DRAM · 6- pin Mini-Din header connector

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Text: connectors RS-232 transceiver and 9- pin connector PS/2 mouse/keyboard connector IrDA transceiver Two 40- pin , ADV7123 140-MHz triple 10-bit high-speed video DAC With 15- pin high-density D-sub connector Supports up , User Manual Figure 4.9. Schematic diagram of the LCD module. Signal Name FPGA Pin No , LCD Power ON/OFF LCD_BLON PIN_K2 LCD Back Light ON/OFF Table 4.6. Pin assignments for the LCD module. 34 DE2 User Manual 4.6 Using the Expansion Header The DE2 Board provides two 40- pin

Text: Using VGA The DE0 board includes a 16- pin D-SUB connector for VGA output. The VGA synchronization , pin assignments between the Cyclone III FPGA and the VGA connector are listed in Table 4.11. An , 4-bit VGA Circuit & VGA Connector LCD /CRT Monitor VGA_VS SW0 Figure 5-5. Block , connector RS-232 transceiver PS/2 mouse/keyboard connector Two 40- pin Expansion Headers 2.2 Block , include LCD module) Clock inputs  50-MHz oscillator VGA output  Uses a 4-bit resistor-network

Abstract: TDS 3160 VGA TDS-3160-XXXX led LVDS display 30 pin connector xga tds3160 20 C-N1 CN17-2 LVDS 30 pin to vga led LVDS display panel 25 pin connector lcd 2X20

Text: Board Connector PH: 1.25 , 15 Pin , 90° J8 Inverter/LED Connector PH: 2.0 , J5 VGA Connector (optional) PH: 2.4 , 13 Pin , 90° J6 DVI Connector (optional) 5 Pin , 90° PH: 2.0 mm, 13Pin,90° J9 Power Connector PH: 2.0 , 4 Pin , 90° J7 LCD Panel for LVDS PH: 2.0 , CN1 7 2*20 Pin , 180° 2. Pin define for connectors J10: Key Board Connector ( 1.25 10 Pin 90 , ON / OFF Control 5V ON ; 0V OFF 8 J5: VGA Connector (2.5 13 Pin 90°) Pin 1 2 3 4 5 6

Text: : VIA® VT8606/TwisterT and VT82C686B Fan IR VGA / LCD controller with optimized Shared Memory Architecture (SMA) LAN Four AGP VGA / LCD & LCD controller up to 1024 x 768 422/485 CRT USB IDE , system reset or IRQ11 104- pin 16-bit PC/104 module connector and 120- pin PCI PC/104-Plus module , -Feb-2007 PCM-3370 Board Diagram Intel ULV/LV Processor VGA Connector VIA VT8606 TTL Panel , PCM-3370 36 -bit TFT LV Intel® Pentium® III PC/104-Plus CPU Module Features PC/104

Well, the question was about connecting, and it looked at first like you just connect it but, while the red thingy has a SD slot included, I think it is a display and it requires an intermediary shield. Plug"n"play is a bit fast and loose with these things and they take quite a bit of planning - hence mine sitting in the box for nearly a year.

Chumby is different; it is open source, and designed to be hacked. For example, the serial port is spelled out on the silkscreen for you and there’s a backdoor to enable sshd, so it’s not big deal to bring up the console. Because of its hackability, you are enabled to do significant modifications due to the availability of all levels of design documentation—hardware, drivers, and application software. While it would be an enormous task to, for example, open up a Zune and put a larger screen on it, here, in this post, I will show you how to hack a chumby to have a larger, higher-resolution screen without too much effort. The native chumby screen is a 3.5” QVGA (320×240) display, but after you complete this hack, you will be treated to a 5.7” VGA (640×480) display.

The first step in the hack is to select a compatible LCD that’s also conveniently available. For various reasons related to how the flat panel display market works, LCDs are difficult to purchase in their raw form. Fortunately, Mouser Electronics has a fair selection of LCD modules available and in-stock, although the price is no where near wholesale. I found that the Microtips MTF-TV57NP721-AV was a good match; you can buy these directly from Mouser for $150.80 by ordering part number 668-MTF-TV57NP721-AV. This LCD module uses a compatible signal format, has an LED backlight that works with a slightly modified chumby backlight driver, and also features a 4-wire resistive touchscreen, which is exactly the technology used by the stock chumby device. While the datasheet for this display is not available for convenient download, the datasheet itself is not marked proprietary or confidential, so I was able to secure a copy with a phone call to the local Microtips sales representative.

The next step is to build an adapter board between the chumby and the LCD. The adapter board is necessary because the flat-flex connector used by the Microtips LCD has a different size and pinout from the existing chumby LCD connector. The design of the board doesn’t require many components, as it is just rewiring the signals between two connector formats, but getting the design right does require attention to detail. It’s particularly important to make sure you get the location of the connectors right, so as to minimize the stress on the flex cables, and you need to be aware of the pinout inversion that happens between the two sides of a flex cable mating to the same type of connector: pin 1 goes to pin 50, and vice versa. Here is a link to the schematic for the adapter board, and a link to the gerbers.

You’ll notice that a 36-pin flat flex cable is specified, even though the Microtips display uses a 33-pin cable. This is because I couldn’t find a 33-pin cable in stock anywhere, but you can use a pair of diagonal cutters to slice a 36-pin cable back into a 33-pin cable. Since there is a chance that you don’t get the cable cut exactly right the first time, I’d recommend buying a couple extra so you can practice on a couple pieces.

Since you won’t need the old LCD anymore, loosen the two long Philips screws on the wifi riser assembly and liberate the core from the LCD/bezel assembly by detaching the two flat flex cables that connect to the core board. Save the wifi riser assembly, screws, standoffs and cables. Also leave all the thermal pads in place; they will hold on their own if you do not peel them off of the circuit boards.

You will need to do some minor rework to the core circuit board of the chumby in order to beef up the backlight driver to work with the more power-hungry backlight of the larger LCD. The original chumby backlight is a 10.2 volt, 40 mA 3-LED backlight. The backlight inside the Microtips LCD is also a 10.2 volt backlight, but it requires 200 mA. Fortunately, the boost converter used to drive the chumby’s backlight has a current switch capable of handling that magnitude of current—the TPS65101 has a 2.3A switch in it. However, some of the external circuitry has to be upgraded. In particular, the catch diode D502 has a forward current rating of 0.5A. While the LCD only draws 200 mA, it is a boost converter so the amount of current going through the catch diode is going to be a bit bigger than the ratio of the output voltage to the input voltage times the average current. Therefore, D502 has to get an upgrade to a footprint-compatible but higher current version, such as the 1A-rated MBRX130TP by Micro Commercial, or the 1.5A-rated RB070M-30TR by Rohm. Finally, in order to actually increase the amount of current pumped into the LCD, the current sense resistor in the feedback network of the boost regulator has to be modified. R524 programs the backlight current in the “on” state of the backlight, though the following relationship: I = 1.146V / R524. Its stock value of 57.6 ohms yields a current near 20 mA; replacing this with a 5.6 ohm resistor will yield a current just over 200 mA.

Now that you’ve got all the bits and pieces, it’s time to put it all together. It’s good practice to mount the pieces so that they aren’t “floating”; the flat flex cables are fragile, and they will easily strain and break if you move the unit around too much. If you have access to a laser cutter, you can build the LCD mount using the designs presented below.

The front bezel could be a simple affair, but I decided to snazz it up a bit by using a process that simulates the look of in-mold decorated injection molded plastics. Normally, with a laser cutter, you engrave on the outside surface, leaving a dull-looking patch and potentially some marring of the work area due to the heat of the laser. In the process I describe here, you first paint the back side of a clear acrylic sheet to the desired color, and then you engrave away the paint from behind. The result is a crystal-clear and mirror-smooth front surface, with a buried color layer and crisp-looking white-colored pattern engraved into the color layer. I finish this off by laminating the back with a second, thin protective layer of acrylic, to prevent the paint from chipping as the piece is handled.

Now, for the details. First take a 1/8” piece of clear acrylic, and strip back the protective shipping tape on one side only in an area that’s about 12″x12″. Immediately spray paint the exposed surface to the color of your choice; in this example, the color blue is used. When selecting a spray paint, pick one that is formulated to adhere to plastic surfaces. Before you spray paint the sheet, it’s important to keep the exposed region free of finger oil, dust and dirt, as these will get trapped underneath the paint and you’ll be staring at those defects forever.

Next, cut a second protective bezel using 1/16” clear acrylic using the reverse bezel pattern. This pattern also has alignment markers on it, which are important for making sure the LCD’s active area is centered in the opening of the bezel. There is no need to treat the reverse bezel with paint because it is simply a protective layer to protect the painted front bezel from chipping and scratching.

Then quickly press the two halves together, paying attention to which way the alignment markers should go for the display to be right side up relative to the logos, and hold in place until the adhesive sets. When you are finished, the bezel should look something like this, as viewed from the rear.

A set of gaskets are applied to the outside of the LCD along the silvery circuitry area of the touchscreen panel in order to improve the touchscreen’s robustness against heat warpage of the acrylic that can cause the bezel to inadvertently touch down onto the screen. The gasket material in this case is Poron, but you may also use a couple layers of thin-cut pieces of masking tape to create a small offset between the bezel edge and the display.

Before screwing the backplate in place, attach the 33-pin flat flex cable (that you previously made by cutting down the 36-pin cable), and connect the other side to the adapter board; at this time, also connect the 4-pin touchpanel cable and the 50-pin cable for the LCD signals to the motherboard. Then, fold the adapter board assembly over and screw it in place using 4x M2x6mm socket cap screws.

Now, connect both the 4-pin touchpanel cable and the 50-pin flat flex cable to the chumby core board. Screw the chumby core board in place using the original screws, standoffs, and wifi riser.

You’re almost done! Flip the LCD assembly into the bezel, using the alignment pattern on the bezel as a guide, and glue the four LCD mounting corners in place, paying attention to ensure that the holes on the mounting corners line up with the holes on the back plate (you can accidentally put a mounting corner on upside down and have the holes end up on the wrong edge of the LCD). Standard super glue works well for this application. Allow the glue to dry for at least a half hour before proceeding.

The final step is to build the stand for the display. In order to do this, you will need a drill press and 1/16” drill. Carefully drill holes vertically into the large, semi-rectangular piece with the slot in it as shown below.

There’s one more step left in the hack, and that’s to modify the kernel and the boot scripts of the chumby. A stock chumby knows nothing about how to drive a VGA display!

The kernel contains the code that initializes the video frame buffer’s size, so the timing needs to be programmed into these registers by modifying the kernel source. Here is a patchfile that you can apply to the 1.5.0 kernel (build 565) that performs the appropriate initializations. The patch modifies one of the clock registers inside the MX21 to increase the frequency of the clock feeding the LCD controller, and it also modifies the LCD controller registers itself. It also patches code that handles copying the initial logo screen from a staging area in RAM to its final location. It’s more involved to get the bootloader to behave properly and show a more elegant startup screen; here is a link to the modified bootloader source. This code replicates the QVGA bitmaps stored in the bootloader four times over inside the VGA frame buffer for the chumby, and it handles some other corner cases during the hand-off between the bootloader and the kernel at higher resolutions as well.

Finally, reboot while holding down the touchscreen so that you enter the “Special Options” mode. When the selection screen comes up, you should be able to log in via the serial console and execute the command “update.sh USB”, which will overwrite the bootloader and the primary kernel with the code patches mentioned above. For safety reasons, the backup partitions’ kernel is not modified by the dongle, so you always have a safe partition to return to for re-flashing a broken chumby. The graphics on the screen will look funny in this mode, but it’s not harmful for the LCD.

Choose from over 30 cables that work with our display modules, as well as with your own designs. Several are matched specifically with Crystalfontz display modules, while others can work with USB to RS232 converters, or even charge your cellphone with our standard USB-A to microUSB-B cable.

We sell the cables in lengths that our engineers use the most. The cable category also includes jumper wires suitable for breadboard and prototyping use.