Densitron LM4790BG-SNY ... These displays are huge versions of the standard 4 x 40 LCD displays. They were orignally bought for a project that never got off the ground at a cost of over $200 each. They use the same interface as the standard 4 x 40 LCD and can be used with Basic Stamps, PIC processors, etc. These unit also have a yellow LED backlighting that will fully illuminate the screen very effectively. Even with the large screen, the unit draws no more power than a normal 4 x 40 LCD. The specifications indicate the basic unit draws only 5 mA. This may be a few milliamps more but not much. LCD and the CMOS circuitry that drive them have the same characteristic of only drawing current to accomplish a change of state. The larger capacitance of the larger display will cause currents to be a little larger but the CMOS chips used are basically the same as in a normal sized display. The LED backlight is another story. Bigger area to illuminate means more LEDs. The specifications indicates that the backlight requires about 2,200 mA. This is accomplished with a 0.47 ohm 2 watt resistor in series with the +5 volt supply. Of course, this depends upon the level of illumination you want to obtain. Lumination intensity is pretty linear with current. Here is a complete data sheet for the LM4790BG-SNY in pdf format. Some of the key things you might wnat to know are: Uses a pair of the standard Hitachi HD44780 CMOS controller chips LCD draw typically 5 mA Backlight draws typically 2,200 mA using a 0.47 ohm, 2 watt in series with +5v Backlight color is yellow Unit is +5 volts, including display contrast, no -5 volts required Viewing area is 244 mm by 68 mm (9.6 inches wide by 2.7 inches tall) Character size is 5.2 mm by 14.51 mm (0.204 inches wide by 0.571 inches tall) Brand new, never unwrapped I am making these available for $47.00 each with a flat $5.00 shipping fee to any place in the Continental US if you use paypal. If outside CONUS shipping will be actual shipping. The following should allow you to buy one for your next project. Here are a few pictures of the units. FIGURE 1 • Units still in orignal wrapping FIGURE 2 • Front of unit FIGURE 3 • Back of unit FIGURE 4 • Connections