10-1Compare Two VoltagesBuild a temperature switch with a comparator that tells the microcontroller HIGH once it's hotter than 40 °C

Press a terminal (the small ◯) to start a wire. Press where you want to bend to place corners, and finish on another terminal or on a wire. Press the middle of a wire and then somewhere else to draw a branch from there. You can drag parts and wires to move them. When you are ready, press "Run!" to turn on the power, and try the switches while it is on.