122-28176 Parallax Inc, 122-28176 Datasheet - Page 92

• 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

Challenge 3-6 Solution
Challenge 3-7 Solution
•
•
I
I
I
I
I
I
When S1 is open, the relay is de-energized and contacts K1 are closed. P8
senses LOW.
When S1 is closed, the relay is energized and contacts K1 open. P8 senses
HIGH.
B
B
C
SAT
SAT
C
= (V
= (5 V− 0.7)/((100)(100 Ω) + 47 kΩ) = 0.075 mA
= I
> I
= (Vdd − 0.3)/R
= (5 V − 0.3 V)/100 Ω = 4.7 mA
B
SAT
I
x h
− 0.7)/( h
. Saturation current can be reached.
FE
= (0.075 mA)(100) = 7.5 mA
FE
R
E
E
+ R
B
)
Figure 3-27
Completed Drawing
Do Not Build