Minecraft Elegance: Cheap Sheep Wool Farm (Java 1.16.4-1.20)

An exceptionally inexpensive wool farm that uses a redstone torch burnout clock as a BUD to shear up to 12 sheep at a time. I believe this farm works in Java 1.16.4+. For versions earlier than 1.19, refer to the Note below at 6:50.

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Reference to Jetmaymendo:    • Lag Efficient Wool Farm (82000/h) [1....  

0:00 Intro
0:22 Materials
0:39 Mechanics
3:10 Tutorial
7:51 Additional Info
8:19 Outro
8:41 Sugarcane and bamboo farms with burnout clock

NOTES
1:10 Mob griefing needs to be set to true for sheep to convert grass to dirt.
1:36 If desired, you can load 8 sheep in each chamber for a total of 16 sheep, allowing for one sheep of each color to be represented in the farm. Be sure to dye the sheep before loading. Also consider the 18- or 24-sheep versions of the farm, screenshots linked below.
2:50 A perfect layout of grass blocks naturally spreading onto the dirt under a trapped sheep will let the sheep produce about 50 wool/hr (600 wool/hr for 12 sheep). This farm is about 42 wool/hr/sheep (500 wool/hr for 12 sheep).
6:30 Water on top of grass blocks will convert the grass to dirt, so a layer of transparent blocks is needed to protect the grass.
6:50 Prior to 1.19, you can just place water against the leaves, as they cannot be waterlogged.
7:51 The rates assume that the farm is loaded and the player is within random tick range, so that the grass can spread.
Lightning strikes can burn leaves and kill sheep, so place a lightning rod a safe distance away from the farm.
Consider surrounding the farm with fences or wall blocks to prevent endermen from moving dirt/grass blocks.
8:01 The theoretical maximum rate of wool farms is about 70 wool/hr/sheep, limited by the rate at which sheep are willing to eat grass.
8:26 The daylight sensor intermittently changes the power level of the redstone wire across the day, which updates up to 2 blocks away, triggering the burnout clock so that it can shear the sheep more often. This increases the rates of the farm by 11% (555 wool/hr). Constantly clocking the dispensers will increase rates by about 16% (580 wool/hr), at the expense of some more redstone components, a lot of noise, and a bit more lag.
8:41 Some viewers have commented that the pistons could be placed in a row, relying on QC to power them. This works, but it's typically preferred to break the sugarcane or bamboo at the same level that it is detected so that items don't fall on the extended piston, which can scatter the drops so that they are more difficult to pick up.

18-SHEEP VERSION (705 wool/hr):
https://www.mediafire.com/view/jc0gcg...

24-SHEEP VERSION (930 wool/hr): https://www.mediafire.com/view/36h2fs...
Load the dispensers as you build the farm. The upper dispenser can be refilled by digging down from the collection chamber. The lower dispensers can be refilled by tunneling underground.