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I have often considered trying to reverse: using high resolution VGA ADC's to digitize for a cheap scope, but the effort involved seemed to high
by DoctorOetker 9y ago
I have often considered trying to reverse: using high resolution VGA ADC's to digitize for a cheap scope, but the effort involved seemed to high
- rasz 9y agoreverse "VGA ADC" in what exactly?
- DoctorOetker 9y agowell you can buy video ADCs from parts suppliers (digikey etc, some parts are pretty cheap, but again, it was seldom clear if they could be used continuously or would refuse to work without proper VSYNC etc) or source them from older digital monitors/dvd players/VGA2HDMI etc (roughly anything that has a VGA in)
- rasz 9y agofast ADC is not the problem per se, you can buy $10 ARM parts with 80MHz 12 bit ADC (LPC4370), pumping that data into computer fast enough is.
- DoctorOetker 9y agosuch a scope would not be a raw part, but include an FPGA: summarize the triggered traces that happened since the last transfer to PC... alternatively speaking, consider the amount of information on the screen of an oscilloscope, thats a low color count, with relatively large areas of the screen unaffected, so 60fps of very compressible image data..