40x4 with codecs mc145026 and mc145027

Rafael_Brazil · Post by **Rafael_Brazil** » January 28th, 2006, 5:42 pm

It?s possible?

I need to built a wireless LCD communication.

I?ve bought this:
http://cgi.ebay.com/1000m-433MHz-RF-Wir ... dZViewItem

Very cheap!

I can use a PIC16F628 if necessary...

Someone can help me??

Thanks!

_X7JAY7X_ · Post by **_X7JAY7X_** » January 28th, 2006, 7:13 pm

I tried a similar thing but it was 313mhz I think. It didnt work. I got it from ebay, maybe it was damaged though. I then went to LINX products and it works great.

It will be very simple. Do you have a serial LCD now? If so does it allow TTL 0 - 5v input or just standard rs232?

Here is how it will work. You need a RS232 to TTL converter on the PC serial port (usually a max232). Attached to that is the transmitter. On the LCD you will have the receiver hooked up to the LCD directly if it allows TTL or through another converter if it is only rs232 (max232).

Let me know if you have any more questions.

J

Rafael_Brazil · Post by **Rafael_Brazil** » January 29th, 2006, 4:14 am

No, my 40x4 is not a serial.

My other way is using a PIC16F628... I am searching for a program in C that can comunicate with serial port and connect the PORTB from PIC to LCD... but with no sucess yet!

Here in Brazil, lynx products it?s very hard to found... when you found, you must bought a lot of units...

_X7JAY7X_ · Post by **_X7JAY7X_** » January 29th, 2006, 5:05 am

You can use my firmware, however 4X40 is not supported yet. You could use it to control the first two lines for now. I plan on adding this in the new release. The new version should be out soon; whenever I get done with this school project.

Goto http://www.freewebs.com/x7jay7x

J

ReverseEngineered · January 30th, 2006, 6:04 am

Likewise I should have an AVR version out soon. It will be entirely Matrix Orbital compatiable (right down to the GPOs and keypad inputs). I don't yet have 4x40 support either, but that will be a simple fix.

Check back for more info.