Electronics & energy
Appliance electricity audit
Appliance electricity audit: Energy per appliance = rated watts × hours/day × quantity × days /1000.
Home / Categories / Electronics & energy
Electronics & energy
Choose a tool. The method, example and assumptions are included.
Electronics & energy
Battery runtime from capacity and load
Battery runtime from capacity and load: Usable energy Wh = capacity Ah × nominal V × usable fraction × efficiency.
Electronics & energy
Capacitor stored energy and charge
Capacitor stored energy and charge: Charge Q=CV; stored energy E=½CV².
Electronics & energy
DC two-wire voltage drop
Calculate resistive voltage drop and wire power loss for a two-conductor DC circuit using entered resistivity.
Electronics & energy
EV charging time and cost
Estimate charging energy, time and electricity cost using battery capacity, charge levels and average wall power.
Electronics & energy
Four-band resistor color decoder
Four-band resistor color decoder: Decode the first two bands as decimal digits, apply the third-band multiplier and use the fourth band as percentage tolerance.
Electronics & energy
Ohm’s law and electrical power
Solve voltage, current or resistance for a simple DC resistor and show electrical power.
Electronics & energy
RC time constant and settling time
RC time constant and settling time using clearly labeled inputs, with the formula, a worked example and practical limits explained.
Electronics & energy
Series and parallel resistor network
Series and parallel resistor network using clearly labeled inputs, with the formula, a worked example and practical limits explained.
Electronics & energy
Solar energy yield from peak sun hours
Model solar energy from installed capacity, entered peak-sun hours and a net performance factor, with a simple energy value.