1. Sound sensors:
Sound sensors are generally a microphone used to detect sound and return a voltage equivalent to the sound level. Using sound sensor a simple robot can be designed to navigate based on the sound receives.
Implementation of sound sensors is not easy as light sensors because it generates a very small voltage difference which will be amplified to generate measurable voltage change.
Consider the sound sensor-based switching circuit:
2. Temperature sensors:
Temperature sensors are used for sensing the change in temperature of the surrounding. It is based on the principle of change in voltage difference for a change in temperature this change in voltage will provide the equivalent temperature value of the surrounding.
Few generally used temperature sensors IC?s are TMP35, TMP37, LM34, LM35, etc.
Consider the temperature sensor pin diagram description is,
