122-28176 Parallax Inc, 122-28176 Datasheet - Page 212
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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In the
plot a point in white based on the X coordinate of
of the temperature with a size of 0.3 absolute. After a 100 ms pause, the point is plotted
using the same parameters in blue to give the effect of a blinking point.
Challenge 6-2: Spanning and Scaling for an Air Conditioner System
Instead of eventually controlling an incubator, assume the system under control is an air
conditioning system for an equipment room. The temperature needs to be monitored and
controlled over a range of 50 °F to 90 °F.
ACTIVITY #3: MANUAL CONTROL OF INCUBATOR
Have you ever ridden in a vehicle with someone who controls the cabin temperature by
cycling the heater or air conditioner on and off? Too hot – turn on the AC. Too cold –
turn off the AC. Every several miles they switch again to keep the cabin comfortable.
Manual control of a system with a small allowable range can be time consuming (and a
little frustrating to other passengers).
In this activity you will construct the incubator circuit used in the remainder of this text.
We will begin by manually controlling the incubator and testing the response. Our
incubator is a closed system containing a resistor acting as a heater and the LM34 for
temperature monitoring.
1. What values of
2. What would be the resolution in degrees Fahrenheit for this range of
3. Draw a graph of byte value vs. temperature.
4. What would be the equation for this line?
5. At 72 °F, what would be:
PlotPoint
temperature?
DEBUG "!FCIR (txtByte),(txtTemp),0.3A,(WHITE)",CR
PAUSE 100
DEBUG "!FCIR ,,,(BLUE)",CR
a. The output of the LM34?
b. The byte value of the ADC0831?
subroutine, StampPlot's Filled Circle (
V_Span
and
V_Offset
would be appropriate?
ADC_ByteValue
!FCIR
) instruction is used to
and the Y coordinate
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