28176 Parallax Inc, 28176 Datasheet - Page 252

• Manufacturer Part Number: 28176
• Description: KIT PARTS PROCESS CONTROL W/TEXT
• Manufacturer: Parallax Inc

Specifications of 28176

• Accessory Type: Process Control
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: BASIC Stamp® 2 and Board of Education
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

Part B:
Figure 7-12 Solution: Op-Amp Configuration for Differential-Gap Control
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Add this variable in the Declarations section:
HeaterRun
Modify
Drive_Heater:
RETURN
If V(LM34) > V(UTP), P3 will be Low
If V(LM34) > V(LTP), P4 will be Low
If V(LM34) < V(UTP), P3 will be High
If V(LM34) > V(LTP), P4 will be Low
If V(LM34) < V(UTP), P3 will be High
If V(LM34) < V(LTP), P4 will be High
IF (TempF < LTP) AND (HeaterRun = 1) THEN
ENDIF
IF (TempF > UTP) THEN
ENDIF
HIGH Heater
LOW Heater
Drive_Heater
VAR
bit
routine:
' Heat On If less than LTP and heater enabled
' Heat off if greater than UTP