Electronic Components for Battery Systems (Strand 2): Reading Resistors, Understanding Schematics, and Using Semiconductors

Resistor

A component that opposes electric current.

Color Bands

System used on resistors to encode value and tolerance.

Tolerance

Indicates how much a resistor's value can deviate from its nominal value.

Significant Digits

The digits in a resistor's value that convey its core value.

Multiplier

The power of ten scale factor used to determine the resistance value.

4-band Resistor

Resistor with 2 digits + multiplier + tolerance.

5-band Resistor

Resistor with 3 digits + multiplier + tolerance.

6-band Resistor

Resistor with 3 digits + multiplier + tolerance + temperature coefficient.

Black (Color Code)

Represents the digit 0 for resistors.

Gold (Multiplier)

Indicates a multiplier of times $10^{-1}$.

Schottky Diode

A diode type known for a lower forward voltage drop compared to standard diodes.

Zener Diode

Conducts in reverse breakdown at a specified voltage, used for voltage reference.

NPN Transistor

A type of BJT where the arrow on the emitter points out.

P-channel MOSFET

FET that uses holes for current flow, often used in high-side switching.

LED

A diode that emits light when current flows through it.

Thermistor

A resistor that varies resistance with temperature.

Gunn Diode

A microwave device that exhibits negative differential resistance.

Darlington Pair

A configuration of two BJTs that allows for higher current gain.

Forward Voltage Drop (V_F)

The voltage loss across a diode when it is conducting.

Ground Symbol

Indicates the reference node for electrical circuits.

Capacitor (Polarized)

A capacitor that has a specific positive and negative terminal.

Op-Amp Symbol

A triangle symbol representing operational amplifiers in schematics.

Zero-ohm Resistor

Functionally a jumper, indicated by codes like 0, 00, or 000.

Schematic Symbol

Standardized drawing representing a component and its connections.

Photodiode

A diode that converts light into an electrical current.

MOSFET Gate Drive

Voltage applied to the gate of a MOSFET to turn it on.

BJT Amplification

Using a small signal at the base to control a larger current from collector to emitter.

Voltage Divider

A circuit that reduces voltage to a desired level using resistors.