Tools

Interactive tools for building, debugging and understanding electronics with the tinyCore. Everything runs in your browser — no account, no upload, no data leaves the page.

Power budget calculatorPlan battery life from a sleep and wake cycle, with real tinyCore v2.1 figures — and an interactive power tree showing where the current actually goes.Open calculatorResistor colour codeRead the bands off a part, or work backwards from a value and watch the bands rearrange. Four and five band, full IEC colour set.Open decoderOhm's lawDrive a live LED circuit. Change the supply, the resistor or the LED colour and watch the current, the heat and the brightness respond — or blow the die.Open circuitSerial monitorRead your board over USB straight from the browser, with a live plotter for graphing sensor values as they arrive.Open monitorBinary flasherWrite your own compiled .bin files to any ESP32 over Web Serial. Pre-flight checks catch bad offsets before they brick the boot.Open flasher

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What needs a cable

The serial monitor and the binary flasher talk to real hardware over Web Serial, so they need Chrome, Edge or Opera on a desktop. Firefox and Safari have no Web Serial support and never prompt for a port.

The calculators are pure maths and run anywhere, phones included.

Looking for the power tree?

The tinyCore v2.1 power tree — USB-C in, the LiPo charger, reverse-voltage protection, and the two regulators behind the 3V3 and PWR rails — now lives inside the power budget calculator, where it is drawn live: the rail carrying charge animates at the speed of your actual current draw, and you can switch the peripheral regulator with the GPIO 6 pad.