Electronics > Beginners
Generating Analog Video
Rerouter:
Variable analog delays of video signals is very hard, So my suggestion was likely a digital approach, but the frequency for the data would likely push it into arm territory which may make it hard to find in dip
https://www.maximintegrated.com/en/products/analog/video-products/MAX9526.html
Something like that for your ADC, takes the video input and spits out a digital stream,
https://www.analog.com/media/en/technical-documentation/data-sheets/adv7170_7171.pdf
and something like this to take your digital stream and spit out the recreated signal,
So that would just leave you to shuffling the samples in with the correct delay, and some kind of ring buffer of memory,
bopstar:
if i need to use an arm chip which would most of the time be SMD do you know a good dev platform
Berni:
Here is the sort of technology that it takes to store video frames in RAM back in the old days of trough hole:
https://www.eevblog.com/forum/vintage-computing/quantel-ramcorder-digital-video-ram-store/
That is the reason all professional analog video production setups use Genlock signals. It replaces this huge expensive digital monstrosity with a simple coax cable instead.
These days you can do it with a single fast MCU or a FPGA along with some ADCs and DACs, but none of this will be breadboard-able. And will need a decen't bit of software to make it run.
bopstar:
Could you hint me on some info on generating analog video. eather via 555 timers a 74/4000 series logic. or Atmel Micro controllers as i just bought an ATMEL ICE.
555 analog video thing:
nali:
Here you are, a quick and dirty mixer http://gieskes.nl/visual-equipment/?file=schele-mixer
Don't expect quality though! You need to consider that the colour reference information is encoded into composite video (colour burst) so you'll get pretty random effects. Do you have RGB available (e.g. SCART)?
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