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LED Specifications Explained: Forward Voltage, Current Limits, and Polarity

An LED needs the right connection and a way to limit current. Learn what forward voltage means, how to choose a series resistor, and how to identify polarity before powering a low-voltage circuit.

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ELECTRONICS EXPLAINED · 4 MIN

02Electronic Components

Signal and Rectifier Diodes: Polarity, Forward Voltage, and Ratings

03Electronic Components

Inductors Explained: Inductance, Current Ratings, and Core Materials

04Electronic Components

Capacitors for Beginners: Capacitance, Voltage Ratings, Types, and Polarity

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Electronic Components

Fixed Resistors: How to Read Values, Tolerances, and Power Ratings

A fixed resistor limits current or divides voltage according to its resistance. Learn to read common color bands and surface-mount codes, understand tolerance, and check whether a resistor can handle the heat a circuit will produce.

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