I am a bit foggy with this at the moment.Require some inputs from everyone.
I want to display real time HH:MM:SS on a television display.
This time is already being displayed on 6" 7-Segment displays.The link is through RS485 @ 9600 bauds.
The data is sent as a string starting with (0x7E) 0x06 0x05 0x04 0x03 0x02 0x01 for displaying
65:43:21 on the 7-segment,0x7E being Start-of-string.
What can be ways (simple and cheap) of adding this string on a Television display (4:3 ,& 16:9) ?
Can teletext chips be used?
How can the position & size of display be decided ?
Do you want to display just the time, or do you want the time superimposed on a video picture? If it's with a picture, is this for a standard def composite NTSC video signal or a high def, component or HDMI signal?
As I said, the problem is sourcing the chips and datasheets.
I made my own circuit years back (long before any ready made ones were available), I used an NEC chip, as it was the only one I could source a datasheet for - and I had access to chips (and crystals etc.) out of old Amstrad satellite receivers and Hitachi VCR's.
Hello Nigel
Thanks for getting back.
Would you be able to sell me a ready out-of-the-box solution,if you have one lying around?..or what do you suggest?..
I am not keen on making one.This will be required in an existing project as an add-on..
I would suggest going for the 'blackboxcamera' solution.
My design was going to be manufacturerd and sold through Dontronics as part of the SIMMStick series - but we were unable to source reliable supplies of the chip, and couldn't even get a datasheet for the newer version of it.
Sorry for a bit of ignorance...but the 'blackboxcamera' solution has an onboard PIC..is it required to be coded for UART comm?
I will be sending data over UART to this board and that should be displayed on the video terminal,is only what i require.
Sorry for a bit of ignorance...but the 'blackboxcamera' solution has an onboard PIC..is it required to be coded for UART comm?
I will be sending data over UART to this board and that should be displayed on the video terminal,is only what i require.
Just what you want then, it takes serial data and displys it on the screen - as far as I can recall there are a number of control codes you can send to produce various settings. I expect it's all explained in the documentation on the site.
Yes i saw that,but again there was some discrepancy in the doc i downloaded where they explained that some software code was available for purchase to interface and program an off-board PIC16F628A.
I again saw that they explained the control codes and one particular code
Code:
Ttext Enters typewriter mode. Text characters entered are displayed immediately on the screen until a return character is entered to exit typewriter mode
which is what i would need..i guess..
So just clearing out the smoke..if i misunerstood something