122-28176 Parallax Inc, 122-28176 Datasheet - Page 89

• 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

Chapter 3: Digital Input Conditioning · Page 79
voltage and the resistance of the collector for the configuration studied. The DC Load
Line is a graphical representation of output voltage and collector current over the linear
range.
The value of R
in a common-emitter configuration determines the saturation current,
C
and thus, the base current required to drive the BJT into saturation. The higher the value
of R
the more sensitive the transistor will be to base current. But high values of R
also
C
C
limit response and switching speeds of the transistor. The maximum power dissipated by
the transistor occurs when it is conducting ½ of saturation current, which leads to heating.
SOLUTIONS TO CHAPTER 3 CHALLENGES
Challenge 3-1 Solution
When the potentiometer supply leads are reversed, rotation will result in the opposite
direction of voltage change as compared to previously. For example, when rotated clock-
wise, the wiper of the potentiometer will be closer to Vdd as opposed to Vss previously.