I2C/RS232 to Standard LCD Converter

This small board allows to connect a standard 1 line or 2 line LCD-Module (with HD44780 LCD-Controller or compatible) to I2C bus or optional to RS232.

Here is the [url=http://www.circuitdb.com/download.php?fileID=155]schematic (Rev. 1) in pdf format[/url]

[url=http://www.circuitdb.com/download.php?fileID=158]Assembly drawing (Rev. 1) in pdf TOP[/url]
[url=http://www.circuitdb.com/download.php?fileID=157]Assembly drawing (Rev. 1) in pdf BOTTOM[/url]

[b:e9b66b14da]Pictures of the board:[/b:e9b66b14da]
[img:e9b66b14da]http://www.circuitdb.com/download.php?fileID=153[/img:e9b66b14da]

[img:e9b66b14da]http://www.circuitdb.com/download.php?fileID=152[/img:e9b66b14da]

[b:e9b66b14da]Interface description[/b:e9b66b14da]
[code:1:e9b66b14da]I2C_LCD Dokumentation
———————

For LCD Display 2* 16 Characters, Hd44780 compatible

Almost SW-compatible to EA7123-I2C

Maximum I2C-speed: 50KHz

I2C Address: 0x74

Initialisatzion: 74 00 2C 0E 06 01

Write pointer to line 1 position 0 : 74 00 02

Write data to display : 74 40 <20 characters>

Data stream :
————
line 1 : char 00,01,02,03,04,05,06,07,08,09,10,11,12,13,14,15,d01,d02,d03,d04,d05,
line 2 : char 16,17,18,19,20,21,22,23,24,26,26,27,28,29,30,31,d06,d07,d08,d09,d10,
line 3 : char d11,d12,d13,d14,d15,d16,d17,d18,d19,d20,d21,d22,d23,d24,d25,d26,d27

( dxx is dummy character for compatibility, will not be displayed,
line 3 is dummy line for compatibility, line 3 will never be displayed)

LCD-Character Position:
———————–
P32=0;
line 1 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15
line 2 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

P32=1;
line 1 .. .. 00 01 02 03 04 05 06 07 08 09 10 11 .. ..
line 2 .. .. 16 17 18 19 20 21 22 23 24 25 26 27 .. ..[/code:1:e9b66b14da]

Copyright 2006 [url=http://www.qsl.net/dk7nt/index.html]Robert Tyrakowski[/url]Parts:Just take a good look at the pictures 😉

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