Using Calculator LCD's

pollack

I want to create a project that has some kind of LCD output but the only problem is that i dont want to buy the parallax lcd because i dont want to spend that kind of money for it. i was wondering if there is any way of using a calculator lcd to do my project instead of the parallax one.

Jon Williams

No, not really. Calculators generally have special chips inside that include the LCD drivers (complicated) for those displays.

That said, you can find low-cost Hitachi HD44780-compatible LCDs nearly anywhere (an electronics store in my area sells them [noparse][[/noparse]used, but in perfect condition]·for $5). We have plenty of examples for connecting standard parallel LCDs to all of our controllers.

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Jon Williams
Applications Engineer, Parallax
Dallas, TX· USA

bobledoux

Old laser printers also used these LCD units.

Try Allelectronics.com for cheap units.

Jon Williams

Yes, and www.bgmicro.com is a good place to look for them as well.

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Jon Williams
Applications Engineer, Parallax
Dallas, TX· USA

Paul Baker

Or here: http://www.goldmine-elec-products.com/products.asp?dept=1039·just be sure you can find the spec sheet on the internet before purchasing any of them to be sure you can hook·it up properly. Items G15263 and G13745 appear to be your best bet for easy hookup, if you need help finding a spec sheet let me know.

Ryan Clarke

Paul Baker said...
Or here: http://www.goldmine-elec-products.com/products.asp?dept=1039 just be sure you can find the spec sheet on the internet before purchasing any of them to be sure you can hook it up properly. Items G15263 and G13745 appear to be your best bet for easy hookup, if you need help finding a spec sheet let me know.

Besides the obvious Google, do you have any specific sites you check for Spec sheets? Just curious.

Thanks!

Ryan

Paul Baker

There are a few "one stop" spec sheet sites (I don't use any on a regular basis, many require registration which I avoid unless nesessary), one of them was disclosed in the Sandbox forum about a month ago. Depending on what product it is, I goto various sources. You could say that Im a professional researcher since each patent application I work on requires finding "existing art" to make a determination on patentability on each case. It is somewhat a black art being able to get relevent results without wading through excessive junk hits, and something I cannot comprehesively teach anyone, but finding spec sheets on a specific part is a little easier than finding "a memory that is controlled using X technique" (since you may call it technique X, but I may know it as technique Y, IBM is notorious for naming already well know concepts in thier own terminology, ie IBM still uses the term DASD instead of hard drive). But I digress, for discrete chips, I typically goto digikey or mouser, assuing they carry the part (www.findchips.com will say whether they do or not). EarthLCD has many specs on different LCD screens, but they mainly cater towards panels. Like I said it all depends on what Im looking for.

Paul Baker

Here is the link to the Sandbox forum post I refered to.

Gary D.

·Wow, Im surprised you even bought a stamp at all. Parallax has a lcd for only 29.95 Not to mention ITS SERIAL.

http://www.parallax.com/detail.asp?product_id=27976

pollack said...
i dont want to spend that kind of money

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
There are 10 kinds of people....

Those who know binary and those who Don't.