dispensers stay powered after activation when the redstone line for activation is beside it
place a dispenser with a repeater behind it.
add a redstone line from the repeater that goes on a block next to the dispenser.
power the redstone line.
the dispenser will stay triggered and the redstone powered.
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First video, the dispenser is irrelevant, as replacing the dispenser with any other block provides the same result. The second video is MC-108, the dispenser stays powered because it's bud-powered.
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