Electronics study guides

An O-Level Electronics overview of the Amplifiers and Operational Amplifiers module. Voltage gain as a ratio and in decibels, the single transistor amplifier and the need for biasing, the inverting and non-inverting op-amp gain equations and negative feedback, and the op-amp comparator, with links to every dot point.

An O-Level Electronics overview of the Analogue Electronics module. Analogue signals and reading a waveform, the potential divider equation, capacitor-resistor time delays, and sensor-driven transistor switching circuits, with links to every dot point.

An O-Level Electronics overview of the Basic Circuit Concepts module. Current, voltage and resistance and their units, standard circuit symbols and conventions, Ohm's law, electrical power and energy, and the rules for series and parallel circuits, with links to every dot point.

An O-Level Electronics overview of the Digital Electronics and Logic Gates module. Binary and logic levels, the AND, OR and NOT gates, NAND and NOR (including why NAND is universal), deriving truth tables of combinational logic, and designing a logic system from a specification, with links to every dot point.

An O-Level Electronics overview of the Electronic Components module. Resistors and the colour code, capacitors and charge storage, the diode and rectification, light-emitting diodes and their series resistor, and the bipolar transistor as a current-controlled device, with links to every dot point.

An O-Level Electronics overview of the Practical Construction and Testing module. Building circuits on breadboard and stripboard with safe soldering, using a multimeter to measure voltage, current and resistance, and a systematic fault-finding method tested against a specification, with links to every dot point.

An O-Level Electronics overview of the Sensors and Transducers module. Input transducers (the LDR and thermistor), switches and variable resistors as inputs, output transducers and their energy conversions, and the relay with its flyback diode for driving large loads, with links to every dot point.

An O-Level Electronics overview of the Systems and Signal Processing module. The input-process-output systems model and block diagrams, the comparison of analogue and digital signals and converting between them, and feedback in control systems including negative and positive feedback, with links to every dot point.