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Transcript
Principles to Computer Engineering ENG_4_532: Week 3 Principles of Computer Engineering: Experiment 1 Introduction to test equipment Experiment 1 Introduction to Breadboard Build simple electrical circuits Develop familiarity with Digital and Analogue Multimeters Introduction to Oscilloscopes and Signal Generators Building a Circuit on the Breadboard Push the component legs into suitably located sockets on breadboard with care Try to layout circuit neatly to look like that of the circuit diagram Double check circuit before connecting power (check polarity!) Use colour coded wires where possible; red = +V, black = 0V, blue = -V Example Circuits to be Built The Lamp Circuit Digital and Analogue Multimeters Can be used to accurately measure voltage and current in a circuit Have different characteristics – simple experiment to compare them DMM has an accuracy of around ±1% Analogue MM accurate to around ±5% Ideally have infinite internal resistance as acting as a voltmeter Digital and Analogue Multimeters Use 1MW resistors in series with both Voltmeters to estimate their input resistances 1 MW Resistor + PSU - + 1MW Analogue meter V IL Meter + + 5V Rx V m Figure 2 Analogue meter in high impedance 5 volt circuit Figure 4 Loading effects at 5 volts The Oscilloscope Used to display time varying waveforms Apply sinusoidal signal from generator at 1kHz (Alternating current) Measure frequency and voltage with ‘scope facilities Peak-to-Peak Voltage can be measured Vrms V pp 2 2 The Oscilloscope Summary Become familiar with use of a breadboard Build elementary circuits and test them Use standard test bench equipment and appreciate their accuracy Introduce the use of oscilloscopes
