sensor

• Electronic transducer that converts a physical quantity into an electronic signal.
• Detect temperature, light, force, strain, etc

Type of sensor

• Color sensor
• Proximity sensor
• Motion sensor
• pH sensor
• Load cell
• Photo cell
• Humidity sensor

BASIC SENSOR CIRCUITS

The bridge circuit

Is used to compare the signal to some setpoint value

The Op Amp Circuit

Is used to amplify any sensor signal that is too small