E12 is a series of standard resistors. Values are logarithmically spaced to ensure uniform relative steps across decades. E12 has 12 resistor values within each decade. For more resistor values look at E24 series.

E24 is a series of standard resistors. Values are logarithmically spaced to ensure uniform relative steps across decades. E24 has 24 resistor values within each decade. E24 has double the amount of values than E12.

Prefixes are used to describe values from the very small to the very large. Pico, Nano, Micro, Kilo, Mega are some of the prefixes.

SI units are the standardized units. The are the ones for electronics. They are the basic units.

Glossary of commonly used words, abbreviations and terms within electronics with description.

Size codes for resistors and capacitors, used when designing PCB's

Here’s a table of widely used batteries, including their physical size, nominal voltage, and approximate rated capacity

Commonly used references of different components on pcbs and schematics

Ohm’s Law (U=I*R) relates voltage, current, and resistance to analyze circuits, while the Power Law (P=U*I) calculates electrical power consumption or dissipation in components.

NE555 in Astable mode: Generates a continuous square wave output with adjustable frequency and duty cycle. Calculate the frequency that different values of resistors and capacitor gives.

NE555 in Monostable mode: Produces a single output pulse of fixed duration when triggered. Calculate the timings.

Calculate resistors or the amplication of an Inverting opamp.

Calculate resistors or the amplication of an non Inverting opamp.

Find the value of Surface mount resistors by entering their 3 digit code.

Calculate the current limitting resistor for a led in circuit.

Find the value of capacitors by entering the 3 digit code found in schematics or on PCBs.

Calculate voltage, current resistance and power with Ohms law. Formulas for Resistors in series, Resistors in Parallel and Voltage divider

Formulas for Capacitors in series and capacitors in parallel. Description of the RC Time Constant.

Impedance of capacitors and inductors in AC Circuits.