Biometric Pulse Rate or Heart Rate detecting sensor
Plug and Play type sensor
Operating Voltage: +5V or +3.3V
Current Consumption: 4mA
Inbuilt Amplification and Noise cancellation circuit.
The PT100 sensor is just like a variable resistor, whose resistance varies with respect to the environment temperature. There are many types of PT100 sensors, the one we use here is a two wire one.
Hall Effect sensor module is used to detect the presence of a magnetic field. The output of the module goes high in the presence of a magnetic field and it becomes low in the absence of a magnetic field.
RFID TAGS are mainly divided in to two types - PASSIVE RFID TAGS and ACTIVE RFID TAGS. PASSIVE RFID TAGS are the TAGS with no internal power source. And ACTIVE RFID TAGS are TAGS with their own power source. We will discuss each of them briefly below.