Saturday, February 28, 2015

"Cyprida 2" already in the works?

While working on the Cyprida project I think about possible enhancements.

While searching for a retroilluminated 4x40 text LCD display I found this one on Futurlec ($44.90, ouch!): apparently its page has an error in the Interface Pin Connections because it only lists a single "E" (enable) pin, while a 4x40 LCD needs two (namely "E1" for the upper 2 lines, and "E2" for the lower 2 lines). And it does not say if the internal font is the Euro/USA one or the Japanese one:


So I started searching for a 320x200 display (320x200 is 64000 pixels with 16:10 aspect ratio), which I consider more interesting than a 320x240 display (76800 pixels and a 4:3 aspect ratio).

Futurlec also has some fancy blue 320x240 graphic display but the price is far from being interesting ($119.90); its controller accepts Seiko SED1335 commands, vaguely resembling Hitachi HD44780 ones, but with more operations about graphics and overlays. Apparently it does not have simple operations like "draw pixel, draw diagonal line", which need to be implemented in the Arduino (at a higher cost). This is because those displays were intended for monitoring data, not for experimenting with graphics or emulating home computers...


Spanish supplier of the Shenzen Topway has a nice 320x200 "green on black" monochrome graphic display. Sadly I can't find the commands list - I guess it is a SED1335-type. No pricing information available (grunt!).


It also features a nice "black on yellow" 4x40 text LCD display:


A very nice 5.7" 320x240 64k-color display is available as well, with a complete firmware (functions like "draw pixel", "draw line", "fill circle" and so on) and even a RS232 port for commands. It would be great to have it on my future "Cyprida 2" project. I am only unable to figure out a price...


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