IR (INFRA-RED) sensor
is based on LM 358 op-amp IC which is 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.
1. Range 2-12cm.
2. Potentiometer for maximum range setting.
3. Can be used to differentiate between black and white (Can be used for line sensing).
4. Oncboard LED indication for detection.
5. Supply Voltage 5V.
6. LM358 IC (Integrated Circuit) that acts as a comparator/ ADC (Anlog to Digital Converter) IC which makes it digital sensor.