How to read Speedo at low speed

[Darrel Taylor]

Darrel Yes I am viewing drunk so this may be wrong

At least we're on the same page ... but my numbers look a little different.

If the distance traveled between pulses is 61cm, and there are 100000 cm per kilometer.
Then there will be 1639 pulses per kilometer (100000 / 61).
At 120 mph (193 kph) you will recieve ~316327 pulses per hour (1639 * 193)
That's ~5272 per minute. (316327 / 60)
Or ~87 per second. (5272 / 60)

Which leaves each pulse period at 0.011494 Seconds per pulse.

Hmmm lets see ... compare that against .... 125 pico seconds at 120mph. uuuhhhh, must be Pabst Blue Ribbon.

120 mph = .000125uS per pulse
60 mph = .000250uS per pulse
10 mph = .001500uS per pulse
6 mph = .002500uS per pulse