Hi Steve,

This is rotor 2. Please process with your spread sheet program.

With the latest program it starts recording the instant the prop
moves. It stops after exactly one minute. This keeps the file size
down. I also edited (deleted) the last half as I only ran the
starter for about 30 seconds or less.

Paul Lamar




Hi Paul I noticed the 8 readings called by the interrupt routine are
all very different now. eg. 0.861523, 0.902881, 0.946387, 0.995801,
1.04736, 1.09141, 1.13545, 1.18916, Previously it looked like the
sample rate was faster. If I average them we will loose a great deal
of resolution. If I chart each reading the waveform is distorted as
the time between the 8 A2D readings and between the sets of 8
readings is different.

Confused Steve


I am not sure what it was doing when we had it set to 1msec.

I think it takes at least 4 msec to write to the file and the display
on the screen per sample. 8 samples 32 msec.

I will rerun both rotors recording only on the SD card and
see if that helps. I'll  just run it wide open and what ever time
it takes that will be the interval. No software interrupt.

I  will try to run it for one minute.

This is the program that I will use. Flat out.

 Cls
Open "press3.dat" For output As #1
SetPin 9,1
 Print #1, "rotor 2"
 Print #1, Date$
 Print #1, Time$
10 press = Pin(9)
If press < 0.40000 GoTo 10
starttime$ = Time$
Print "started"

20
count = count + 1
If count > 16000 Then GoTo 50
press = Pin(9)
Print #1, press;
Print #1, ",";
goto 20

50 Close 1
Print #1, "Start time = ";starttime$""
Print  #1, "Current time = ";Time$
End

Can you handle one big long comma delimited file?

Paul Lamar

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