Ecd302 unit 03 (part b)(instrument)(a)


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Ecd302 unit 03 (part b)(instrument)(a)

  1. 1. Electronics Workbench (EWB) Instruments (part a)
  2. 2. EWB Instruments Multimeter Function Generator 2 channel Oscilloscope Bode Plotter Frequency Counter Word generator 4 channel Oscilloscope Logic analyzer Logic converter Wattmeter
  3. 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. 4. Multimeter (DC measurement) Voltage measurement Current measurement DC setting
  5. 5. Multimeter (AC measurement) Voltage measurement Current measurement AC setting
  6. 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. 7. Function Generator Voltage measurement Current measurement Function generator
  8. 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. 9. Wattmeter Voltage measurement Current measurement
  10. 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. 11. Oscilloscope Measure input signal Measure output signal
  12. 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. 13. Bode plotter Measure input signal Measure output signal Magnitude versus frequency Phase versus frequency
  14. 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. 15. Frequency Counter 555 timer 1 kHz configuration Actual output frequency Duration of 1 cycle
  16. 16. Frequency Counter 555 timer 1 kHz configuration Duration of positive pulse Duration of negative pulse Rise time of a single counter
  17. 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. 18. Logic analyzerProbing 1st input signal Probing 2nd input signal Probing output signal
  19. 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. 20. Logic Converter Deriving truth table from circuit
  21. 21. Logic Converter Converting truth table to Boolean expression Boolean expression obtained
  22. 22. Logic Converter Simplify truth table to Boolean expression Simplified Boolean expression
  23. 23. Logic Converter 1st step: Type desired Boolean expression 2nd step: Converting Boolean expression to truth table Truth table printed here!
  24. 24. Logic Converter Converting Boolean expression to circuit Circuit produced
  25. 25. Logic Converter Converting Boolean expression to NAND circuit Circuit produced