Introduction to LTSPICE for Simulating a complete Regulated Power Supply Circuit

This video show how to simulate a complete Regulated Power Supply Circuit in LTSPICE, comprising transformer, diode bridge rectifier, smoothing capacitor filter and zener diode. The circuit is progressively discussed and simulated in LTSPICE. It has the following sections:

(00:00) [1] Introduction
(02:09) [2] Input model
(02:54) [3] Transformer model
(06:13) [4] 1N4001-4007 diode model
(07:12) [5] How to use cursors
(11:36) [6] Zener diode model

It describes the following:
[a] In Section 2: How to configure voltage component as a SINE source for input to the power supply circuit.
[b] In Section 3: How to model the transformer in LTSPICE.
[c] In Section 4: How to access the diode models available in LTSPICE and how to add the popular rectifier diode model, such as 1N4001, 1N4002 and 1N4007, to LTSPICE.
[d] In Section 5: How to enable and position cursors in LTSPICE (both single and double cursors) to measure the voltages of interest at intermediate points in the circuit (such as transformer secondary output voltage, peak output voltage of bridge rectifier, ripple voltage magnitude and frequency).
[e] In Section 6: How to access the zener diode models available in LTSPICE and how to add the popular zener diode model, such as 1N751, to LTSPICE.

Note: For latest versions of LTSPICE, the model definition file that you need to edit can be found in the location C:\Users\[USERNAME]\Documents\LTspiceXVII\lib\cmp and NOT the folder where LTSPICE is installed (such as C:\Program Files\LTC\LTspiceXVII\lib\cmp).

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Note added in Jan 2021:
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There is a small typo in the video. In the "how to simulate a transformer" section, following the convention with which the transformer turns ratio n is defined (4:52) then

v_sec = n * v_pri

not  v_sec = (1/n) * v_pri

The values shown and simulated in the video are all correct since they use the v_sec = n * v_pri relationship.


Note added in March 2021:
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The theoretical values can easily be calculated by writing a small script in any programming language. See for instance the Matlab script below:

% Inputs
f = 50;
Vpri_rms = 240;
R = 1e3;
C = 100e-6;

% Transformer turns ratio
n = 1/20;
Lsec = 1;
Lpri = (1/n)^2

% Voltages
Vsec_p = (n)*(Vpri_rms)*sqrt(2)
Vo_p = Vsec_p - 1.4
Vr_pp = Vo_p/(2*f*R*C)
Vo_DC = Vo_p - 0.5*Vr_pp

Note added in Dec. 221
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Instead of using cursors, we can use measure directive to get the values of interest. See video here: Using Measure Directive in LTSPICE fo...