Electronics calculators
- Resistor Color Code
Read 4, 5 and 6-band resistors, or find the bands for a value.
- LED Resistor
Pick the current-limiting resistor and its power rating.
- Voltage Divider
Output voltage and loading effect, or solve R2 for a target Vout.
- RC Filter
Cutoff frequency, time constant and attenuation at any frequency.
- LC Resonance
Resonant frequency, characteristic impedance and Q.
- 555 Timer
Astable frequency/duty cycle and monostable pulse width.
- Battery Life
Runtime from capacity, active/sleep current and duty cycle.
- PCB Trace Width
IPC-2221 trace width for your current and temperature rise.
- Electronics Unit Converter
SI prefixes, AWG ↔ mm², mil ↔ mm, dBm ↔ mW, oz copper.