122-28176 Parallax Inc, 122-28176 Datasheet - Page 114
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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ACTIVITY #4: BOX CONVEYOR BELT – COUNTING AND EDGE
DETECTION
Parts Required
Same circuit as Activity #2
This conveyor belt simulation activity uses the same BASIC Stamp circuit and StampPlot
macro as the previous activities, but addresses different issues by using a conveyor
system to count and divert boxes to one of two loading bays. The following is the feature
set of this control system, depicted in Figure 4-14:
EDGE DETECTION
Before beginning any programming, let us first discuss issues involved in counting with
digital inputs. One of the functions of the system is to count the boxes that pass. The
digital input is LOW when a box is detected with the opto-reflective switch. Should the
Figure 4-14 Conveyor Belt System
•
•
•
Detection and counting of boxes to be loaded onto trucks. The yellow LED
indicates detection.
Operation of a gate to divert the boxes to one of two truck-loading bays signified
by a green LED. One full truckload is 6 boxes.
Operation of the conveyor belt with the use of two pushbutton switches – Start
and Stop. The energized conveyor is signified with the red LED.
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