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IR Sensor
Description:
IR (INFRA-RED) sensor is based on LM 358 IC which is an Operational amplifier acting as a comparator. The comparator compares the analog voltages of potentiometer and the voltage generated by the photodiode. The two voltages are applied on the two terminals of the IC and correspondingly it generates a digital output on the output pin that is indicated by a Red Led.
The IR sensor is compatible with various microcontroller boards like 8051, Arduino, pic etc This shield is based on the working of a circuit comprising op-amp, an IR led and photodiode the output generate by the sensor is due the comparator action of the op-amp (LM-358). The IC compares the two voltages that is generated by the photodiode and the potentiometer. When the value of voltage Vd generated by photodiode is greater than the voltage set on the potentiometer, the output s HIGH and vice versa.
- 2-12cm range
- Potentiometer for maximum range setting
- Can be used to differentiate between black and white (Can be used for line sensing)
- Onboard LED indication for detection
- Works on 5V input
- TTL compatible output
- LM358 IC (Integrated Circuit) that acts as a comparator/ ADC (Anlog to Digital Converter) IC which makes it digital sensor.