https://www.planetminecraft.com/project/build-001-horse-speedometer/
by popular demand, my horse speedometer is now published on PM! check it out!
How It Works (Simple Instructions)
Stand at either end of the speedometer.
Move straight from one set of pressure plates to the other — walking, running, or riding a horse.
The Redstone measures how long it takes you to cross and lights up a row of lamps.
Count the lamps that stay lit. That number is your speed result.
You can run it in either direction, and it will still work the same.
Reading the Results
More lamps = slower speed
Fewer lamps = faster speed
For reference:
Player walking: ~8 lamps
Player sprinting: ~6 lamps
Average horse: ~4 lamps
by hazeheadstone