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Table of Contents

1. DC and AC Voltages

DC Voltage Sources
AC Voltage Sources
Measuring voltages using a multimeter

2. Current and Resistors

Introduction
Resistors in series
Resistors in parallel
Creating a voltage divider using resistors
Measuring current using a multimeter
Measuring resistance using a multimeter

3. Power dissipation

Introduction
Power dissipation in a resistor
Power dissipation of series-connected resistors
Power dissipation of parallel-connected resistors

4. Capacitors

Introduction
The impedance of a capacitor
Phase shift
Relation between voltage and current
Frequency filters
ESR
Timer circuits
Types of capacitors

5. Diodes

Introduction
An AC Voltage Rectifier
LEDs
Zener Diodes
Testing diodes using a multimeter

6. Bipolar Transistors

Introduction
The transistor as a switch
The Darlington
The transistor as an amplifier
Testing transistors using a multimeter

7. Project: A simple adjustable DC power supply

The transformer
The diagram

8. Differential Amplifier

Typical example
DC Current Source

9. Operational Amplifier

Introduction
Opamp used as an amplifier
Opamp used as a threshold switch
Opamp used as a voltage-controlled current source
Diode and transistor tester

10. Lab Power Supply

The diagram
Voltage feedback
Current limitation
Protective circuitry
Choosing your components
Assembly

11. Heatsink

Introduction
Calculations

12. Power Amplifiers

Introduction
Emitter follower
Balance amplifier
Bias
Darlingtons
Opamp

13. Inductors

Introduction
The impedance of an inductor
Relation between voltage and current
Frequency filters
Quality factor

14. Decibels (dB)

Power and Voltage Ratios
Reference-related dBs

15. Vocal Eliminator

Introduction
Schematic
Choosing components
Testing
Assembly

16. Symmetric power supply

Introduction
Up to about 25mA
Up to 1A

17. JFETs

Introduction
JFET amplifier
JFET current source

18. MOSFETs

Introduction
MOSFET amplifier
Dual-gate MOSFETs

19. LC filters

Introduction
High pass filter
Band pass filter
Band pass filter with a smaller band
Resonance
Tuned circuit

20. Miscellaneous filters

Introduction
Coupled filters
Twin T-filter
Bridged T-filters

21. Frequency-independant voltage devider

Introduction
HF probe
Attenuator in an oscilloscope

22. DIACs, SCRs and TRIACs

DIAC
SCR
TRIAC

23. TV Deflection Circuit

Warning
The picture tube
Deflection coils
Deflection circuit
Linearity correction
S-Correction
EW-Correction
Practical Examples

24. Automatic volume control

Introduction
Schematic
Choosing components
Power supply

A. Calculating RMS value

B. Inside semiconductors

Inside a diode

P type and N type semiconductors
Joining P and N together
Zener diodes
Varicap diodes

Inside a bipolar transistor

Joining three layers of P and N together
Applying voltages across a transistor

Inside a JFET

Joining three layers of P and N together
Applying voltages across a JFET

Inside a MOSFET

Joining three layers of P and N together
Applying some voltages across an enhancement MOSFET
Depletion MOSFETs

C. Buffer capacitor

Calculation of the value of a buffer capacitor
ESR

D. Amplifier stability

Introduction
Stability

E. Complex math

Calculations on a capacitor and resistor in series.
Calculations on an inductor and resistor in series.
Calculations on a capacitor and inductor in series.
Calculations on a tuned LC circuit.

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