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Builder tools

10 calculators for the numbers that come up while you are building. Everything runs in the browser and nothing is saved.

Power

Battery life estimatorRuntime from a duty cycle, and where the energy is actually going.
Solar panel sizingPanel watts and battery amp hours for a node that has to survive a bad week.
Battery chemistry voltage referenceCharge, nominal, storage, and cut off voltages at pack level.

Wiring and connectors

Wire gauge, current, and voltage dropSmallest copper wire that carries the current without browning out the far end.
Connector current referenceWhich connectors carry the current you need, and which quietly will not.

PCB

PCB trace widthTrace width for a given current and temperature rise, using IPC-2221.

Sensors and analog

Drone

Thrust to weight ratioWhether the build will fly, and how it will feel when it does.

Reference

Resistor colour codeBands to value and value to bands, for 4, 5, and 6 band resistors.