122-28176 Parallax Inc, 122-28176 Datasheet - Page 179
122-28176
Manufacturer Part Number
122-28176
Description
GUIDE STUDENT PROCESS CONTROL
Manufacturer
Parallax Inc
Specifications of 122-28176
Accessory Type
Manual
Product
Microcontroller Accessories
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
Propeller Education (PE) Kit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
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Challenge 5-6: Monitoring RPM
√
√
√
√
Save ModPwmFiltering.bs2 under a new name.
Modify the program to show the fan's RPM in the StampPlot 'User Status' box
above the plot. Example code to update the text:
DEBUG "!STAT RPM= ", DEC RPM,CR
Add all variables, pin assignments, and code to count and scale to RPM.
Measure the tachometer count for 1 second.
Tachometer.bs2 for a starting point.
From 5 V to 10 V for fan voltage, calculate the fan's RPM per volt and fill in
Table 5-2 . With long sample times, does the speed of the fan vary between
PWM updates?
Voltage
10
5
6
7
8
9
Table 5-2: Voltage vs. RPM
RPM
Use pertinent code from
RPM/Volt
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