Building a TV Thermometer
To build our TV thermometer, we’ll use the TMP36 sensor again, so we’ll combine the circuit we created in Increasing Precision Using a Temperature Sensor, with the circuit we created for generating the video signal. You can see the result in Figure 24, Circuit of the TV thermometer.
Don’t get confused by what the circuit for the video signal looks like in the circuit diagram. That’s how you would build the circuit on a breadboard. Of course, you can still connect the modified RCA cable directly to the Arduino. Then connect the circuit for the TMP36 sensor.
Before we dive into ...
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