Technology

In lecture 16 Introduction to Digital Electronics - Bode Diagrams the topics covered were magnitude response, decibels and Bode plot of high pass filter. Node Voltage Analysis can be used to analyse the circuits. For simple circuits, Voltage Divider Rule can be used.

Technology

In lecture 15 Introduction to Digital Electronics - Phasor Calculations the topics taught were time domain and frequency domain. Some parts of these lectures can be tough. Additional notes would help. Could not really catch all of what was taught. Nevertheless, I have definitely learnt something from this course.

American Idol 7

David Cook has won the American Idol this year. Based on the surveys this week, the result was not a big surprise. Of course, I still feel that David Archuleta deserves to win it . Strange enough according to some some sources from the internet, all three judges had also favoured David Archuleta but from what I saw Paula Abdul did not really state a clear winner. She did say that his performance left her speechless and he was stunning. However, David Cook did sing the song " Dream Big" quite well. Click here to watch it.

Technology

In lecture 14 Introduction to Digital Electronics - Phasors the topics taught were Fourier analysis, network analyser, analysing circuits with sinusoidal inputs, use of complex numbers and Laplace transforms, examples of using complex numbers for solving circuit problems, magnitude and phase of complex numbers.

Author K. A. Stroud wrote about complex numbers in his book Engineering Mathematics (Fifth Edition, 2001) , which is the first programme in part II of the book. This is a useful book and there is a website of the Personal Tutor available too. Click here to access

Technology

In lecture 13 Introduction to Digital Electronics - Frequency Domain the topics taught were revision of boost converter, efficiency, initial transient, steady state, periodic signals, sinusoidal signal, average power, root mean square voltage for sinusoidal and sawtooth signals, sinusoidal signal for processing of other signals and skin effect.

Technology

In lecture 12 Introduction to Digital Electronics - NVA with L and C (Due to technical problem, lecture is only 30 minutes long. The audio is low)
the topic taught was analysis of switching converter circuit which has an inductor and a capacitor. As the lecture is only 30 minutes long, I looked for more information for this part and the notes are available here . Click on ''Notes'' and then "Lecture 13" or to go straight to it, click here.

Technology

In lecture 11 Introduction to Digital Electronics - Capacitor and Inductor Examples the topics taught were cancer diagnostic, capacitors in series and in parallel, what happens - (a) when a voltage source is connected to a capacitor, (b) when a current source is connected to a capacitor , building a current source, goal of building a function generator, calculation involving a circuit with a capacitor and resistor in series, time constant and timer.

Technology

In lecture 10 Introduction to Digital Electronics - Capacitance and Inductance, the topics taught were (i) use of capacitors for building timer circuits and filter high frequency noise, (ii) the new concept of electronic memory in capacitors - the storage of charges in capacitors, (iii) structure of capacitors, (iv) building a sensor to detect how much fluid is inside a container with the use of capacitors, (v) touch sensor, (vi)formulas involving current, power and energy (vii) super capacitors, (viii) discussion on how to build low power microprocessors.

Technology

In lecture 9 Introduction to Digital Electronics-Review the topics covered were revision of inverting and non-inverting amplifiers, input resistance of an inverting amplifier, use of a buffer and discussion of a problem involving an instrumentation amplifier.