PIC video

[heida11]

I currently have weather information displayed on a graphics LCD(256X128) using a 16F628.

Wind, rain and temp is captured. Both current and hourly activity over a 24 hr period is displayed.

I would like to feed the eight bit output(PORTB) to a TV instead but
the PIC is too slow for this amount of data.

The output to the TV (NTSC) can be either composite video or RF(ch 3 or 4).

An old ATARI computer I used to have, output its display to RF(ch 3/4).

Is there a device/circuit available that will accept eight bit info from the PIC and produce the NTSC signal?

 

[Oznog]

Yeah, there's some stuff to do simple overlays on an existing video signal. It can't display an entire graphics page so it's a bit limited. Note the difference between generating a signal and overlaying over an existing signal. Most of these projects do an overlay.

They're not really simple to build, and not cheap to buy. But not too crazy.

Search the web for "PIC video overlay"

 

[Beefer3]

If you don't mind, what type of display are you using for the LCD display and could you share the code? :lol:

I am having trouble with my HD68130A 256X128 display and would like to try something new.

Thanks

 

[heida11]

Thanks.
I have found video overlay is the way to go. Just need to find a supply
for the STV5730a chip and my problem will be solved.

The LCD I use is Hyundai HG25604 for All Electronics(LCD101).
www.allelectronics.com 18.50USD
It uses the SED1330fba controller. Get specs from the internet and
plan to spend some time reviewing them!!!
Pay special attention to the contrast (-10 to 15)voltage.
I will strip the LCD routines from the application and post them in some
forum in a few days.

 

[Beefer3]

heida11

thanks!!!!