Just by deactivating the write command you can easily turn the video delay module into a video looper.
Actually there is no need to seperately refresh the DRAM, because every byte gets read every other second anyway – free auto refresh when the bank is recharged. For loop cycles of at least 3 seconds this seems to work (and with analog video we’re not that picky if sometimes a bit in the stream gets corrupted…) . We had the same loop running for hours without any visual degradation. cool.
|Power Draw on +5V:||N/A|
|Power Draw on -5V:||N/A|
Schematic & PCB
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