1
UNIVERSITY OF CALIFORNIA, BERKELEY
EE100 Summer 2008 Lab 1
Introduction to Circuits and Instruments Guide
1.
Objectives
The electronic circuit is the basis for all branches of electrical engineering. In this
lab, basic electronic circuit theory, electronic and photonic devices will be
introduced and employed. Fundamental testing equipment will be used to
measure and characterize simple circuitry. In the handson lab, you will apply
these basic theories to the devices and components provided to design simple
circuits.
2.
Basic circuit theory and devices
In this section, some basic circuit theory will be presented first. You will need to
apply this to the following handson lab to design your circuit. Simple electronic
and photonic devices such as resistors, light emitting diodes (LEDs) and
speakers/microphones will also be discussed and used in the lab. Before doing
the lab, please read through this section carefully and complete the prelab to
test your understanding of the material presented here.
(1) Ohm’s Law:
V = IR
Current (denoted
I
) and voltage (denoted
V
) are two major quantities that are
used to study electronic circuits. Current is the amount of charge passing
through a certain area in a unit time period, while voltage describes the
electrical potential drop across any two nodes in a given circuit. Ohm’s Law
states that the voltage
V
across an ideal resistor is proportional to the current
I
through the resistor. The constant of proportionality is the resistance
R
of the
resistor.
I
R
+
V

I
V
Slope =
R
IR
V
=
Figure 1
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