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Here’s a fun build from [RootSaid] that is suitable for people just getting started with microcontrollers and robotics — an Arduino-controlled two-wheeled robot. The video assumes you already have one ...

Sensors are PT100, in series with 100 ohm fix resistor. This system gets around 1 volts (5V is too much for PT100). So you have to use the VREF of the arduino. It measures AMBIENT temp and room temp.