Originally Posted by
Megahertz
Hi, it works fine with 2500. Can you please explain how you calculated 2500? Thanks
Being Honest ...
1) read Datasheet Page 3 ...
4: PWM - PWM Output 0－25000US，Every 50US represent 1cm
2) read PbP Manual page 133 ...
The resolution of
PULSIN is dependent upon the oscillator frequency. If
a 4MHz oscillator is used, the pulse width is returned in 10us increments.
3) The distance is 5 meters = 500 cm
from 1) and 3) ...
4) Pulse will be 500cm * 50µs/cm = 25 000 µs
from 4) and 2) ...
@4 Mhz Pulsin will return 25 000 / 10 = 2 500 units
This is the
mathematical explanation of zeu thing
Alain
PS@ Dave
Don't you think I should add " Need Help " in my signature validity conditions ???
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