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Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at The micro controlling it treats the LCD is memory, writing to address locations. I have other projects on my list right now so I’ll leave this LCD on hold.

A PIC 16F provided all data input and display format. SRAM usually k, 32k x 8, very cheap and common a crystal oscillator, and thats pretty much it.

I recently developed an instrument package for one of my hot air balloons using a 64 x pixel display with KS and KS controllers. Thanks for the clarification. Just saying hello Started by MichaelaJoy Yesterday at 6: Does it have an additional controller and perhaps RAM or negative voltage power source? Sorry for the pesimistic ‘numbers’ post.

You must log in or register to reply here. I know this board includes four, LC’s and three, LC’s. Welcome to our site! Media New media New comments Search datasjeet.


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The EW34F50 on this page may be the unit: It took about lines of code in assembler, much of which consisted of graphics and fonts data tables. I’m not trying to discourage folk from lc74901 the display, x’s are awesome!

Forums New posts Search forums. Potentiometer Questions Started by norbss Yesterday at It requires clock and data lines to ‘scan’ across the display and refresh the image frame from memory.

I said datashedt general’ because the two are often interchangable and have caused me headaches in the past when researching how to drive these things. I’ve attached a pdf from dztasheet manufacturer. Much like a raster scan on a TV.

Again, sorry for the long post, I got a bit obsessed with LCD’s back in the days of sticking them on ones PC to display pointless information and my mind is stil full of crap about em Edit: Please provide reference to this type of display being used with an on board controller.


For a better experience, please enable JavaScript in your browser before proceeding. So I know it can be done for slowly changing data.

By continuing to use this site, you are consenting to our use of cookies. Blueteeth Well-Known Member Feb 11, So, even without drawing anything on screen, printing fonts, your micro will be too busy just taking data from memory, and sending it to the display.

320 x 240 Grpahic Display for $4

Click here to register now. So whilst any micro attached to these has to ‘draw’ text, essentially the LCD has an inbuilt controller – albeit with limited functionality. So you’ll need to provide a new 4-bit nibble at 1. All that said, despite the cost of a controller IC, they l79401 actually require much in the way of external circuitry.

LC Datasheet catalog

The larger LCD you posted has no such controller. Haven’t lc7940 the display but seems like its controllerless. There have been a couple of old AVR projects which drive sorry, control these displays directly using external SRAM but given the speed they don’t have much in the way of ‘options’.