Free Electronics tutorials for Beginners

General Theory
[Amplifier, Reactance, Impedance, Source & Load, Integrator, Generator, Motor, Oscillator, Modulator (FM, AM, Pulse), Semiconductor, Circuit Symbol, Filter, Light, Sound, Clipper & Limiters]

Electronics Components
[Register color code, Diode, Transformer, Capacitors, Speaker, Integrator Circuits, Switch, LED, CRT, Relay, Ware & Cable]

Electronics unit testers & Measurement tools
[Signal Generator, Testing Transistor, Measuring Current, Algorithm fault finder & others.]  

Digital Circuits
[Logic Gates, Binary Numbers, Maltivibrators, 7 Segment Decoder]

DC Theory
[DC Current, Voltage, Ohms Law, Resistor, Battery & others]

Block Diagrams
[AM &FM Transmitter, AM & FM Receivers, Mono & Color TV Receiver, Mono & Color TV Camera, Tape Recorder, Oscilloscope, Digital Clock & others]

Practical Skill & Project
[Soldering, Ware Wrapping, Logic Probe, & other lot of practical]

Free Electronics tutorials for Intermediate Level

Diode Tutorials
[P-N Junction, Barrier, Biasing, Characteristics Curves, Half wave Rectifier, Full wave Rectifier, LED, Zener Diode,  Diode Connection & more]

Transistor Tutorials
[Structure, Operation, Biasing, Load Transistor, Amplifier classification, Power Amplifier, Push-pull Amplifier & more]

UJT | FET
[Junction FET, MOSFET, MOSFET Circuits Symbol & More]

OP-Amp Tutorials
[Basic OP-Amp, Characteristics, Setting, Inverter, using as Alarm, timer, Audio Mixer & Dual power Supply & More ]

Combinational Logic Tutorials
[Truth Table, Diode Logic, Transistor Logic, Logic Gate combination, Low Level activate Logic, Boolean Expressions, De Morgan Theorem, Adder, Encoder, Decoder, Tri-State Logic & more]

Flip-Flop Tutorials
[R-S Flip-Flop, Clocked R-S Flip-Flop, D Type Flip-Flop, Edge Trigger, Toggle, Master/Slave Flip-Flop & more]

Sequential Logic Tutorials
[Asynchronous Counters, Synchronous Counters, Decode Counters, SISO Register, SIPO Register, PISO Register, PIPO Register, Converters & Multiplexers]

Microprocessor System Tutorials
[Bit/Bite, System Diagram, Architecture, ALU, RAM, ROM, Memory MAP, Addressing Mode, Flow Chart Symbol, System Flag & Interpreter]

TRIAC & DIAC Tutorials
[Theory, Structure, Symbol, Connection and more]

555 Timer Tutorials
[free tutorials, Similar IC for deferent manufacturers, Block Diagram, Internal Structure, 555 Schematic, Definition of Pin Function, 555 Timer test, example circuits and definition.]