July 2012
Beginner
576 pages
9h 46m
English
Content preview from Complete Electronics Self-Teaching Guide with Projects
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The Voltage Divider
23 The circuit shown in Figure 1.7 is called a voltage divider. It is the basis for many important theoretical and practical ideas you encounter throughout the entire field of electronics.
The object of this circuit is to create an output voltage (V0) that you can control based upon the two resistors and the input voltage. V0 is also the voltage drop across R2.
Question
What is the formula for V0? _____
Answers
R1 + R2 = RT, the total resistance of the circuit.
24 A simple example can demonstrate the use of this formula.
Question
For the circuit shown in Figure 1.8, what is V0? _____
Answers
25 Now, try these problems.
Questions
What is the output voltage for each combination of supply voltage and resistance?
A. VS = 1 volt, R1 = 1 ohm, R2 = 1 ohm
V0 = _____
B. VS = 6 volts, R1 = 4 ohms, R2 = 2 ohms
V0 = _____
C. VS = 10 volts, R1 = 3.3. kΩ, R2 = 5.6 kΩ
V0 = _____
D. VS = 28 volts, R1 = 22 kΩ, R2 = 6.2 kΩ
V0 = _____
Answers
A. 0.5 volts
B. 2 volts
C. 6.3 volts
D. 6.16 volts
26 The output voltage ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.