The most popular resistance color code has nominal resistance values and tolerances indicated by the colors of either three or four bands around the resistor casing, as shown in Fig. 2-3.
First digit Second digit Number of zeros or multiplier
Each color has a corresponding numerical value as specified in Table 2-4. The colors of the first and second bands correspond, respectively, to the first two digits of the nominal resistance value. Because the first digit is never zero, the first band is never black.
The resistor is an electrical device whose primary function is to introduce resistance to the flow of electric
current. The magnitude of opposition to the flow of current is called the resistance of the resistor. A larger
resistance value indicates a greater opposition to current flow.
The resistance is measured in ohms. An ohm is the resistance that arises when a current of one ampere is
passed through a resistor subjected to one volt across its terminals.
This book covers fundamental aspects of electric circuits that form the core of many engineering disciplines. In particular, basic circuit elements and their characteristics are presented when connected in an electric network. In addition, techniques to analyse and solve electric circuits are explained in a simple manner and examples are shown to demonstrate each strategy. DC as well as AC circuit analysis is provided with a brief account of filters in the end.
A combinationacombinational circuit
has inputs, outputs and
an internal logic circuit
Constitutes a mapping
from the inputs to the
A sequential circuit has
inputs, outputs, an
internal logic circuit and
binary cells as memory
A binary cell is a memory
device with two possible states.
Resistors in an AC circuit, capacitors in an AC circuit, inductors in an AC circuit, the RLC series circuit, power in an ac circuit, resonance in a series rlc circuit, the transformer,... As the main contents of the document "Alternating current circuits and electromagnetic waves". Invite you to consult.
Di®erent types of numbers ¯nd di®erent application in the physical world. Whole numbers
work well for counting discrete objects, such as the number of resistors in a circuit. Integers are
needed when negative equivalents of whole numbers are required. Irrational numbers are numbers
that cannot be exactly expressed as the ratio of two integers, and the ratio of a perfect circle's
circumference to its diameter (¼) is a good physical example of this.
The field of clectronic music is undergoing an electronics
revolution similar to thc current microproccssor/microcomputer
revolution. Initially music synthesizcrs wcrc built using discrete
components-transistors, resistors, capacitors, etc. Synthcsizer
modules wcre fairly complex in design and were subject
to temperature stability and reliability problems due to the
large number of individual components used.
Electronics may be defined as the science and technology of
electronic devices and systems.Electronic devices are primarily non-linear devices such as
diodes and transistors and in general integrated circuits (ICs) in
which small signals (voltages and currents) are applied to them.
Of course, electronic systems may include resistors, capacitors
and inductors as well.
A voltage regulator circuit automatically maintains the output voltage of a power supply constant, regardless of - a change in the load - a change in the source voltage
The simplest of all voltage regulators is the zener diode voltage regulator. A zener diode is a special diode that p is optimized for operation in the g breakdown region.
ZENER DIODE CIRCUIT
The zener diode is typically connected reverse biased, in parallel with the load. Resistor Rs limits current to zener.
Dependent Sources and Amplifiers
6.002 – Fall 2002: Lecture 8
Nonlinear circuits — can use the node method Small signal trick resulted in linear response Today Dependent sources Amplifiers Reading: Chapter 7.1, 7.2
6.002 – Fall 2002: Lecture 8
Seen previously Resistor Independent Current source + i +
R v –
v i= R
2-terminal 1-port devices New type of device: Dependent source iI i
+ control port
f ( vI )
– 2-port device
Although we are surrounded by sophisticated computerised gadgets these
days, there is still a fascination in putting together a few resistors, capacitors
and the odd transistor to make a simple electronic circuit. It is really
surprising how a handful of components can perform a useful function, and
the satisfaction of having built it yourself is incalcuable.
Serial Connection And Parallel Connection
Figure 1 shows the most basic and commonly used circuits for driving light-emitting diodes. In Figure 1(A), a constant voltage source (VCC ) is connected through a current limiting resistor (R) to an LED so that it is supplied with forward current (IF). The IF current flowing through the LED is expressed as IF = (V CC - VF)/R, providing a radiant flux proportional to the IF. The forward voltage (V F) of the LED is dependent on the value of IF, but it is approximated by a constant voltage when setting R. Figures 1(B) and...
This time in Very Basic Circuits, I would like to talk about pull-up resistors. The basic function of a pull-up resistor is to insure that given no other input, a circuit assumes a default value. Actually, there are two flavors...