How often to re-initialize a character LCD display?

Started by mpm in sci.electronics.design2 years ago 18 replies

I'm just wondering what "standard practice" is for re-initializing a character-based LCD display (i.e., a 2x16 backlit LCD)? I have a project...

I'm just wondering what "standard practice" is for re-initializing a character-based LCD display (i.e., a 2x16 backlit LCD)? I have a project in the works now that erratically displays a blank LCD. I haven't quite tracked down what might be wrong, but I could "fix" the whole issue by just re-initializing the LCD on every pass. (This is very simply loop software..., check some inputs,


LCD Monitor repair

Started by Anonymous in sci.electronics.design7 years ago
LCD

finally a sure and guarantee way to learn the secrets of LCD Monitor repair= . Do you know that understanding of how each sections in LCD Monitor...

finally a sure and guarantee way to learn the secrets of LCD Monitor repair= . Do you know that understanding of how each sections in LCD Monitor work i= s the key of success in LCD Monitor troubleshooting? Yes, if you ignore thi= s facts, then chances for you to successfully repaired a LCD Monitor will b= e very slim http://sh.st/OtKh


LCD Monitor repair

Started by Anonymous in sci.electronics.design7 years ago
LCD

finally a sure and guarantee way to learn the secrets of LCD Monitor repair= . Do you know that understanding of how each sections in LCD Monitor...

finally a sure and guarantee way to learn the secrets of LCD Monitor repair= . Do you know that understanding of how each sections in LCD Monitor work i= s the key of success in LCD Monitor troubleshooting? Yes, if you ignore thi= s facts, then chances for you to successfully repaired a LCD Monitor will b= e very slim http://gostman2006.jestinewilliamlcd.click2sell.eu


Saving LCD screens that were under water

Started by Anonymous in sci.electronics.design2 years ago 10 replies

I had some electronics in a storage building, which flooded. I figured that most of it is junk, but I wiped it clean and put some of the...

I had some electronics in a storage building, which flooded. I figured that most of it is junk, but I wiped it clean and put some of the stuff outside in the sun to bake dry. So far, much of it works. But two items, a GPS and a Police Scanner, both with LCD screens have very faint screens. I kind of think the water affected the LCD screens. Is there any way to get them LCD screens to work...


3.3 V vs. PCF8814-based "Nokia 1100" LCD?

Started by Ivan Shmakov in sci.electronics.design7 years ago
LCD

I've got a "Nokia 1100" LCD, which (unless I be mistaken) is based on PCF8814, whose digital I/O range is (1.7 .. 3.3) V. The question is:...

I've got a "Nokia 1100" LCD, which (unless I be mistaken) is based on PCF8814, whose digital I/O range is (1.7 .. 3.3) V. The question is: is there an easy and safe way to connect it to an otherwise 3.3 V (+/- some) circuit (as in: one interfacing an SD card, or having an Arduino as its core, etc.)? (Will a few diodes suffice, for instance?) Also, the pinout for the LCD (e. g., ...


Insiders knowledge; Custom LCD construction

Started by Klaus Kragelund in sci.electronics.design6 years ago 1 reply
LCD

Hi I am purchasing a custom LCD (FSTN or TFT), but I am running into limited knowledge of the actual design and production setup of LCD and the...

Hi I am purchasing a custom LCD (FSTN or TFT), but I am running into limited knowledge of the actual design and production setup of LCD and the constraints involved For example, how is the routing from the COG controller to the crystals and what affects the form ratio of a display. Active area versus Visible Area and border outline So, anyone know of a reference for this. A book perhaps c...


LCD with large active area versus outer dimensions

Started by Klaus Kragelund in sci.electronics.design8 years ago 7 replies
LCD

Hi We have been getting some information on a FSTN LCD display we need, rarthe= r small, 20mm x 30mm. It is for an industrial product with...

Hi We have been getting some information on a FSTN LCD display we need, rarthe= r small, 20mm x 30mm. It is for an industrial product with 10years lifetime The problem is when we specify a resolution of 64x64 pixels, the Y pixels a= re access by the LCD controller by routing on either side of the display do= ts (on the left and right side). But, this routing occupies space, so havin= g a...


[Semi-OT] Multisync LCD monitors

Started by Phil Hobbs in sci.electronics.design2 years ago 16 replies

Hi, all, My shiny new (to me) HP 89441A has an analogue video output, but none of my LCD monitors can sync to it--one says "out of range" and...

Hi, all, My shiny new (to me) HP 89441A has an analogue video output, but none of my LCD monitors can sync to it--one says "out of range" and the other two just sit there sulking. So I think that its vertical sync is too fast for them. Any recommendations for LCD monitors that can handle Y2K-ish vertical sync rates? Thanks Phil Hobbs -- Dr Philip C D Hobbs Principal Cons...


Canon powershow hs sx50 mirrors the lcd screen when rotated towards viewer.

Started by Anonymous in sci.electronics.design6 months ago 2 replies

I just discovered something weird and something slightly annoying about this camera: This canon powershow hs sx50 mirrors the lcd screen when...

I just discovered something weird and something slightly annoying about this camera: This canon powershow hs sx50 mirrors the lcd screen when it's rotated towards viewer. It's really strange... I proved this by holding up a card with letters on it, when the LCD screen is "bend/twisted/rotated" suddenly the camera will mirror the LCD screen like you are looking in a mirror ?


HW for reading OCR data

Started by gm in sci.electronics.design5 years ago 21 replies
LCD

Hi. I have one problem. I need to read data from one LCD keypad but the problem is that i can not put camera in front of lcd keypad because...

Hi. I have one problem. I need to read data from one LCD keypad but the problem is that i can not put camera in front of lcd keypad because end user will not see what is done... Is there any way to put somekind of transparent "part" to LCD , so i can pickup data and pass it to camera or serial port ? GM


Force LCD monitor "white"/"black"

Started by Don Y in sci.electronics.design6 years ago 34 replies
LCD

Hi, Anyone know how the drive to an LCD panel works? Specifically, how one can force the display to appear "all white" or "all black"...

Hi, Anyone know how the drive to an LCD panel works? Specifically, how one can force the display to appear "all white" or "all black" WITHOUT relying on the electronics already present in the monitor? E.g., imagine having *just* the LCD panel and being able to operate it as a "light gate" (full on, full off). Thx!


Tablet LCD on raspberry

Started by gm in sci.electronics.design5 years ago 5 replies
LCD

Hi. Does someone knows if there is any way to connect some tablet touch screen to raspberry model B LCD connector ? I dont want to conect...

Hi. Does someone knows if there is any way to connect some tablet touch screen to raspberry model B LCD connector ? I dont want to conect it over hdmi. I was planning to connect it directly to board. Something like this but with tablet. http://www.ebay.com/itm/7-800x480-LCD-Screen-Display-Monitor-for-Raspberry-Pi-B-w-HDMI-VGA-AV-Dr iver-/301271608133 I have few used tablets and i ha


Repaired my Samsung LCD monitor.

Started by Jan Panteltje in sci.electronics.design9 years ago 3 replies

After replacing those electrolytes in the switchmode power supply the picture is also much sharper. I suspect the PLL in the electronics to be...

After replacing those electrolytes in the switchmode power supply the picture is also much sharper. I suspect the PLL in the electronics to be more stable due to less ripple. But more amazingly, that what I thought was burn-in of the LCD, vertical stripes strongest at the left side, something I could never get rid of with an anti burn in program, is almost gone. Could have been modulation of...


LCD cleaning

Started by Don Y in sci.electronics.design5 years ago 66 replies
LCD

Hi, I've always advocated "100 proof"[1] alcohol and a microfiber rag to clean LCD monitors. Is there a commercial product (that...

Hi, I've always advocated "100 proof"[1] alcohol and a microfiber rag to clean LCD monitors. Is there a commercial product (that doesn't have silly additives, dyes, etc.) that I can recommend to a friend for the same purpose (albeit much more expensive)? Thx, --don [1] Of course, you *make* this from distilled water and isopropyl alcohol -- save the "good stuff" for drinking! :> ...


LCD display weirdness

Started by bitrex in sci.electronics.design4 years ago 4 replies
LCD

I removed the glass LCD panel on a 16x1 display so I could peel off the reflective coating and install an electroluminescent backlight. I...

I removed the glass LCD panel on a 16x1 display so I could peel off the reflective coating and install an electroluminescent backlight. I noticed that for a while, as I touched the contacts with my fingers I could trigger some of the display segments to turn on briefly. I let the panel sit for a couple hours and the effect is gone now. Guessing that the capacitance between the "sandwic...


7-segment LCD to BCD decoder ?

Started by N_Cook in sci.electronics.design6 years ago 83 replies

Assuming one back-plane to consider , what would be most efficient component-count/least complex discrete/CMOS/74 route , ie not pic/Pi/uC to...

Assuming one back-plane to consider , what would be most efficient component-count/least complex discrete/CMOS/74 route , ie not pic/Pi/uC to firstly convert the ex-oring business to proper levels and then the "mapping", output could be linear per digit rather than bcd. Starting with an off-the-shelf commercial unit where the LCD display is driven off a uC, to give a remotely monitorable ...


Ping Jeff Lieberman

Started by bitrex in sci.electronics.design2 years ago 10 replies

Is there any OEM source for laptop enclosures? Specifically the dreaded Dell. I got another hand-me-down Dell laptop where the LCD and guts...

Is there any OEM source for laptop enclosures? Specifically the dreaded Dell. I got another hand-me-down Dell laptop where the LCD and guts are fine but the cheap plastic case and keyboard is cracked and beat to hell. I can get replacement keyboards on Amazon.com, sometimes spare LCD bezels and backplates turn up on eBay but was wondering if there's any source to buy the whole thing p...


Need a handheld enclosure for 16x2 LCD

Started by mpm in sci.electronics.design4 months ago 15 replies

Anybody know of a good source for handheld enclosures to fit a standard 16x2 line backlit LCD display? Preferably one that also has a 9-volt...

Anybody know of a good source for handheld enclosures to fit a standard 16x2 line backlit LCD display? Preferably one that also has a 9-volt battery compartment. Plastic is preferred. (Metal is also OK) And preferably one that comes complete with a bezel. This will be for a generic (temporary-use) handheld-type tester for something that runs on an RS-485 loop. So, a place to put QTY-(1...


Repaired my Samsung LCD monitor.

Started by Jan Panteltje in sci.electronics.design9 years ago 8 replies

Repaired my Samsung LCD monitor. Started making a ticking noise yesterday, display flashing on / off one per second. Switching it on and off and...

Repaired my Samsung LCD monitor. Started making a ticking noise yesterday, display flashing on / off one per second. Switching it on and off and setting brightness lower made it work. This morning same thing, but no way to get it working. It was at Samsung for repair in the guarantee period, but now long past guarantee, on 12 hours a day, now for lets see 6 or seven years? So, as no guarante...


Source of LCD - touch screen panel mounting bezels?

Started by DTJ in sci.electronics.design6 years ago 1 reply
LCD

We're looking at using a small (

We're looking at using a small (