Ecd302 unit 03 (part b)(instrument)(a)Presentation Transcript
Electronics Workbench (EWB) Instruments (part a)
EWB Instruments Multimeter Function Generator 2 channel Oscilloscope Bode Plotter Frequency Counter Word generator 4 channel Oscilloscope Logic analyzer Logic converter Wattmeter
Multimeter Schematic symbol Use the multimeter to measure AC or DC voltage or current, and resistance or decibel loss between two nodes in a circuit. Display Current (Ampere) Voltage (Volt) Resistance (Ohm) Power (Decibel) Alternating current (AC) + probe - probe Direct current (DC) + probe - probe
Multimeter (DC measurement) DC setting Voltage measurement Current measurement
Multimeter (AC measurement) AC setting Voltage measurement Current measurement
Function Generator Schematic symbol Sinusoidal wave Sawtooth wave Square wave 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. + probe - probe + probe - probe
Function Generator Voltage measurement Current measurement Function generator
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.
Wattmeter Voltage measurement Current measurement
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.
Oscilloscope Measure input signal Measure output signal
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.
Bode plotter Measure input signal Measure output signal Magnitude versus frequency Phase versus frequency
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.
Frequency Counter 555 timer 1 kHz configuration Actual output frequency Duration of 1 cycle
Frequency Counter 555 timer 1 kHz configuration Duration of positive pulse Duration of negative pulse Rise time of a single counter
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.
Logic analyzer Probing 1 st input signal Probing 2 nd input signal Probing output signal
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
Logic Converter Deriving truth table from circuit
Logic Converter Converting truth table to Boolean expression Boolean expression obtained
Logic Converter Simplify truth table to Boolean expression Simplified Boolean expression
Logic Converter 1 st step: Type desired Boolean expression 2 nd step: Converting Boolean expression to truth table Truth table printed here!
Logic Converter Converting Boolean expression to circuit Circuit produced
Logic Converter Converting Boolean expression to NAND circuit Circuit produced