320x240 LCD Display How to get working

320x240 LCD Display How to get working

YOU MUST BE ABLE TO SOLDER AND UNDERSTAND A BIT ABOUT ELECTRONICS TO MAKE THESE LCDS WORK

REQUIREMENTSSED13305 Graphics Controller or RA8835 these controllers are the same. Got mine from EBAY Pre-built I have the old version.

http://www.ebay.co.uk/itm/SED1335-SED1330-Control-Board-320240-LCD-Module-Display-/190409089539?pt=LH_DefaultDomain_0&hash=item2c55442203#ht_6232wt_1163 (Price has gone up lately!)

LCD Studio

http://www.lcdstudio.com/site20/home.php

Soldering Skills you will need to connect the PC Parallel port to the controller chip

Negative Voltage Generator To get you going, just use 3 x 9 volt batteries in series and connect as described below.

LCD Data

Data sourced from here - http://www.masoportunidades.com.ar/aviso/4643788-lcd-display-grafico-320x240-con-backlight-marca-edt-disponible-en-buenos-aires

But here is the data anyway:-

In the diagram above, the LED Backlight connection says connect 24volts DC Dont, it works off 5Volts just fine. CharacteristicsModule Size: 134.5 x 117.0 mmEffective Area: 103.5 x 117.0 mmActive Area: 95.98 x 79 mmDot size: 0.28 x 0.28 mmDot Pitch 0.3 x 0.3 mm4 Dot-Matrix LCD driver LC794013 Dot-Matrix LCD driver LC79430Y: Yellow - greenL: LED transflectiveY: STN - Yellow green

PIN-OUT 14 PINS

1 Vo (contraste)2 Vee(drivers)3 D3 (LS79401)4 D2 (LS79401)5 D1 (LS79401)6 D0 (LS79401)7 GND8 Vdd (Logica)9 CL2 (CP LS79401)10 CL1 (CP LS79430)11 FLM (DIOB0)12 LEDs K13 LEDs A14 NC

IMPORTANT NOTE Refer to the image above on how to connect the Contrast potentiometer one side goes to +5v not the usual 0V

Connecting up

(TIP as we are going to use a PC to drive the LCD, you can use the 5 volts from the USB connector to drive the LCD)

1 Connect the LCD Pins to the board as follows (you may have to use the datasheet to buzz out the connector pins of the graphics driver board if not supplied :-

SED LCD Controller LCD Display

GND (0v)7GND (0V)

XD33D3

XD24D2

XD15D1

XD06D0

+5V8VDD (+5V

XSCL9CL2

LP10CL1

WFNCNC

YD 11FLM

YSCLNCNC

BACKLIGHTLCD Pin 12 connect to +5VLCD Pin 13 connect to 0v

Negative Voltage (VEE) ConnectionConnect the -27 Volts (negative voltage created by putting 3 x 9 volt batteries in Series) AFTER you apply the 5Volts to the Display or the contrast wont work properly. The Positive of the 27 volt battery goes to 0 Volts line and the ve goes to the VEE pin / 1 leg of the potentiometer.

Now you must wire up a cable from the PC Parallel port as follows (Leave off the RESET pin and pushbutton and the backlight setup)

http://www.skagon.com/images/wiring/powertip_wiring.png

THATS THE LCD PART DONE

1 Install LCD Studio2 go through the setup wizard and setup LCD Studio for use with the SED controller as follows:-

Click on DESIGN (Top left icon)Drag a clock onto the display and stretch it out a bit

click on PLAY icon and watch the display show a clock!

If you see nothing, turn the potentiometer to adjust the contrast. If still nothing, disconnect the -27volts and reconnect then readjust the contrast pot.

Job done!