122-28176 Parallax Inc, 122-28176 Datasheet - Page 139
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 4-7: Adding Speed Indicators
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√
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Re-run Tachometer.bs2, and close the Debug Terminal.
Run StampPlot macro pc_gen_process.spm.
Complete Table 4-4 in Activity #6 using the higher cycles/count encoder wheels
if not yet complete.
Add an active-high red LED to P11, and a green one on P10.
Save Tachometer.bs2 under a new name.
Add code that will light the Green LED if the RPM is greater than 7500 RPM (or
500 RPM below your normal RPM). Light the red LED if the speed is less than
that value.
You may have to re-adjust the distance between the QRB1114 and the fan when using
the Darlington pair circuit.
Figure 4-27
Opto-Reflective
Switch Using
Darlington Pair
Wiring Diagram
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