Answers you would otherwise go and look up.

Four, five or six bands, read left to right, to a value and a tolerance.

The three or four characters printed on a chip resistor, in any of the four schemes.

104 is 100 nF is 0.1 µF. Three names for one part, and the code nobody can do.

Any two of volts, amps, ohms and watts, and the other two follow.

Resistors end to end or side by side, and the one value they add up to.

Two resistors, what comes out of the middle, and what it costs to leave connected.

The resistor an LED needs on 3.3 V, 5 V or 12 V, before you wire it.

How long a board runs on a cell, from its sleep current and how often it wakes.

What a gauge is in millimetres, and the volts it loses down the run.

What an AMS1117 burns turning your input into 3.3 V, and whether it survives it.

What a reel of WS2812s draws, what supply it needs, and what the wire loses.

What six in series by seven in parallel asks of your supply.

Resolution, colour depth and bus speed, and the frames a second they allow.

Draw a glyph on the 5×8 grid and take away the eight bytes that make it.

How long the pair takes to settle, and the corner it puts in your signal.

Celsius, Fahrenheit and kelvin, against the temperatures a datasheet quotes.

The count on your serial monitor, and the millivolts it is standing for.

A number in any of four bases, and the bit pattern underneath it.