1. Electronics Workbench (EWB)
Instruments (part a)
2. EWB Instruments
Multimeter
Function Generator
2 channel Oscilloscope
Bode Plotter
Frequency Counter
Word generator
4 channel Oscilloscope
Logic analyzer
Logic converter
Wattmeter
3. Multimeter
Display
Current (Ampere)
Voltage (Volt)
Resistance (Ohm)
Power (Decibel)
Alternating current (AC)
+ probe
- probe
Direct current (DC)
+ probe - probe
Schematic symbol
Use the multimeter to measure AC or DC voltage
or current, and resistance or decibel loss
between two nodes in a circuit.
4. Multimeter (DC measurement)
Voltage measurement
Current
measurement DC
setting
5. Multimeter (AC measurement)
Voltage measurement
Current
measurement
AC
setting
6. Function Generator
+ probe - probe
Schematic symbol
Sinusoidal wave
Sawtooth wave
Square wave
+ probe - probe
The function generator is a voltage source that
supplies sine, triangular or square waves. Its
frequency, amplitude, duty cycle and DC offset
can be controlled.
7. Function Generator
Voltage measurement
Current
measurement
Function
generator
8. Wattmeter
Voltmeter
Schematic symbol
+ -
Ammeter
+ -
Display (Wattage)
Power factor
The wattmeter measures power. It is used to measure the magnitude of the active
power, that is, the product of the voltage difference and the current flowing through
the current terminals in a circuit. The results are shown in watts. The wattmeter
also displays the power factor, calculated by measuring the difference between the
voltages and the current, and multiplying them together. The power factor is the
cosine of the phase angle before the voltage and current.
9. Wattmeter
Voltage measurement
Current measurement
10. Oscilloscope
Channel A
Schematic symbol
Channel B
Ground
Trigger
Toggle between
black and white
screen
Vertical cursor 1 Vertical cursor 2
Vertical cursor 1 (Readouts)
Vertical cursor 2 (Readouts)
Difference between cursor
(Readout)
Saving in
ASCII text file
The dual-channel oscilloscope displays the
magnitude and frequency variations of
electronic signals. It can provide a graph of
the strength of one or two signals over time,
or allow comparison of one waveform to
another.
11. Oscilloscope
Measure
input signal
Measure
output
signal
12. Bode plotter
Schematic symbol
Input
signal
channel
Output
signal
channel
A Bode magnitude plot is a graph of log magnitude
versus frequency, plotted with a log-frequency axis,
to show the frequency response of a linear system.
A Bode phase plot is a graph of phase versus frequency,
also plotted on a log-frequency axis, usually used in
conjunction with the magnitude plot, to evaluate how
much a frequency will be phase-shifted.
13. Bode plotter
Measure
input signal
Measure
output
signal
Magnitude versus frequency
Phase versus frequency
14. Frequency counter
Schematic symbol
Frequency counter
is used to measure
signal frequency
Frequency Probe
Display
The minimum
sensing voltage
Trigger level is the point that
must be reached by the waveform
before a reading is displayed
Display
only the AC
component
of a signal
Display
only the DC
component
of a signal
The frequency counter is used to measure
signal frequency.
15. Frequency Counter
555 timer 1 kHz configuration
Actual
output
frequency
Duration
of 1 cycle
16. Frequency Counter
555 timer 1 kHz configuration
Duration of
positive pulse
Duration of
negative pulse
Rise time
of a single
counter
17. Logic analyzer
Schematic symbol
Signal
Probe
External
clock
Clock
qualifier
Trigger
qualifier
The logic analyzer displays up to 16 digital
signals in a circuit. It is used for fast data
acquisition of logic states and advanced
timing analysis to help design large
systems and carry out troubleshooting.
18. Logic analyzerProbing
1st
input
signal
Probing
2nd
input
signal
Probing
output
signal
19. Logic Converter
Schematic symbol
8 input signal probe
Boolean
Truth table
1 output
signal probe
The logic converter is able to perform several transformations
of a circuit representation or digital signal. This is a useful tool
for digital circuit analysis, but has no real-world counterpart. It
can be attached to a circuit to derive the truth table or
Boolean expression the circuit embodies, or to produce a
circuit from a truth table or Boolean expression.
Deriving truth table from circuit
Convert truth table to Boolean
Simplify truth table to Boolean
Convert Boolean to truth table
Convert Boolean to circuit
Convert Boolean to NAND circuit
20. Logic Converter
Deriving truth table from circuit
21. Logic Converter
Converting truth table to Boolean expression
Boolean expression obtained
22. Logic Converter
Simplify truth table to Boolean expression
Simplified Boolean expression
23. Logic Converter
1st
step:
Type desired
Boolean
expression
2nd
step:
Converting Boolean
expression to truth
table
Truth table
printed
here!
24. Logic Converter
Converting Boolean
expression to circuit
Circuit
produced
25. Logic Converter
Converting Boolean
expression to NAND
circuit
Circuit
produced
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