Useful Arduino calculators for power, GPIO, LEDs, voltage dividers and embedded electronics design.
Estimate Arduino battery runtime using active current, sleep current, duty cycle and regulator efficiency.
Calculate LED resistor values for Arduino GPIO pins using supply voltage, LED voltage and target current.
Calculate voltage divider output voltage and resistor current for Arduino analog input circuits.
Estimate Arduino average current from active and sleep operation duty cycle.
Calculate resistor divider values for simple Arduino 5V to 3.3V signal level shifting.
Calculate Arduino GPIO current and total port current for LEDs and external loads.
Estimate regulator power dissipation and heating for Arduino boards powered from Vin or DC jack.