Explore electronics calculators for resistor networks, voltage divider circuits, Wire Yagi antenna dimensions, RF learning, and practical circuit analysis.
These tools are built for students, engineers, radio hobbyists, electronics learners, and makers who want fast formula-based results with clear assumptions.
Electronics design often requires quick calculations before building, simulating, or testing a circuit. This hub brings together calculators for voltage dividers and antenna geometry so users can estimate values before moving to practical implementation.
Use these tools to understand resistor voltage drops, series divider behavior, wavelength-based antenna dimensions, and basic RF design relationships.
Use this calculator for resistor networks and voltage divider circuit analysis.
Calculate voltage drops and node voltages for a voltage divider made from three resistors connected in series.
Use this calculator for basic antenna dimension estimates based on operating frequency and element count.
Estimate reflector, driven element, and director lengths for a Wire Yagi antenna using operating frequency and number of elements.
Use these calculators to check circuit formulas, learn resistor divider behavior, and connect voltage/current concepts to practical examples.
Use the tools for early estimates before breadboarding, testing, measuring, simulating, or adjusting a real electronics project.
Use the antenna calculator as an educational starting point for Yagi dimensions, then verify with antenna modeling, measurements, and local radio rules.
A three-resistor voltage divider uses the same current through all resistors when they are connected in series:
Each resistor voltage drop is calculated from Ohm’s law:
Antenna calculators are usually based on wavelength:
Here, λ is wavelength, c is the speed of light, and f is frequency. Real antenna performance also depends on wire diameter, element spacing, ground effects, feedpoint impedance, construction accuracy, environment, and tuning.
This hub includes a Voltage Divider 3 Resistors Calculator and a Wire Yagi Calculator.
No. Do not use this calculator as the basis for mains or high-voltage design. Mains circuits require proper isolation, rated components, standards, enclosures, fusing, and qualified electrical work.
A load adds an additional resistance path that changes the equivalent resistance of part of the divider. This can shift the output voltage away from the unloaded calculation.
No. It gives practical starting dimensions. Real antennas should be checked with antenna modeling software, SWR measurement, tuning, and real installation conditions.
Only where allowed by local regulations and with appropriate licensing, equipment, frequency, power level, and RF safety practices.