Measuring time between pulses

Archiver

Hi All,

I am new to the group and have a need to record a series of pulses
and measure and record the time between those pulses. I expect up
to 10 pulses within say, 3 seconds of time.

Is there an easy way to accomplish this using a BS2SX?

Thanks

Don

Archiver

In a message dated 7/19/02 15:58:46 Eastern Daylight Time,
donaldscott_18@y... writes:


> I am new to the group and have a need to record a series of pulses
> and measure and record the time between those pulses. I expect up
> to 10 pulses within say, 3 seconds of time.
>
> Is there an easy way to accomplish this using a BS2SX?
>

With the BS2 I write

for x = 1 to 10
pulson pin, 0, result 'pulse width is stored in result,0 is low to
high
w(x) = result '1 is high to low
next

for x = 1 to 10
debug ? w(x), cr
next

You might have to modify this a bit - I'm not familar with the BS2SX

Sid


[noparse][[/noparse]Non-text portions of this message have been removed]

Archiver

>Hi All,
>I am new to the group and have a need to record a series of pulses
>and measure and record the time between those pulses. I expect up
>to 10 pulses within say, 3 seconds of time.
>Is there an easy way to accomplish this using a BS2SX?
>Thanks
>Don

How much resolution do you need in the timing of the pulses? The
reason I ask is that the Stamp will have to do the timing in a loop.
While the BS2sx does have builtin PULSIN and RCTIME commands that
have resolution to 0.8 microsecond, they are not able to time a pulse
much longer than 50 milliseconds (0.8 * 65536 microseconds).

I have some options for timing longer pulses posted at
http://www.emesystems.com/BS2speed.htm#longpulse

There is the option of using a loop in code that can resolve the time
to about 0.5 millisecond on a BS2sx, or there are solutions using
external support chips.

-- regards,
Tracy Allen
electronically monitored ecosystems
mailto:tracy@e...
http://www.emesystems.com