Electronics & Hardware tools

Test any game controller in the browser: live button states, analog values, stick plots, and a vibration check.

Drag across a grid to reveal touchscreen dead zones, with live multi-touch tracking and per-finger coordinates.

Calculate pixels per inch, dot pitch, and aspect ratio from a screen's resolution and diagonal size.

Enter any two of voltage, current, resistance, and power to solve the other two instantly with Ohm's law.

Calculate voltage drop over a wire run from AWG gauge, length, current, and circuit type, with a 3% warning.

Find the minimum AWG wire gauge that meets both your voltage-drop limit and standard ampacity ratings.

Estimate battery runtime from capacity, voltage, and load, with depth-of-discharge and efficiency factors.

Find the ideal TV size for your seating distance (or vice versa) using THX, SMPTE, and 1080p guidelines.

Solve projector throw distance, image width, or throw ratio from the other two, with screen-diagonal helpers.

Add up appliance running and surge watts from an editable checklist to get a recommended generator size.

Size a solar array from daily kWh usage (or your electric bill), peak sun hours, panel wattage, and losses.

Size an off-grid battery bank from daily kWh, days of autonomy, voltage, depth of discharge, and inverter efficiency.

Estimate UPS backup runtime in minutes from battery watt-hours (or VAh × power factor), load, and inverter efficiency.

Calculate the current-limiting resistor for LEDs: exact ohms, nearest standard E24 value, and power rating.

Calculate speaker enclosure volume from internal dimensions, minus driver displacement, plus ported-box port length.