General Description:

The MAX30100 is an integrated pulse oximetry and heart rate monitor sensor solution. It combines two LEDs, a photodetector, optimized optics, and low-noise analog signal processing to detect pulse oximetry and heart-rate signals.

Working Principle:

The MAX30100 utilizes photoplethysmography (PPG) to measure blood volume changes in tissue. It emits red and infrared light into the skin, which is partially absorbed by blood and tissues. The reflected light is detected by a photodetector, allowing the sensor to extract heart rate and blood oxygen saturation levels. This non-invasive approach makes it valuable in wearable fitness trackers and medical devices.

Specifications:

1. Optical sensor: IR and red LED combined with a photodetector.

2. Measures absorbance of pulsing blood.

3. Uses I2C communication protocol.

4. 1.8V - 3.3V power supply complete pulse oximeter and heart rate sensor solution, simplifies design, integrated LEDs, photo sensor, and high-performance analog front.

5. Ultra-low power operation increases battery life for wearable devices.

6. Ambient, light cancellation high sample rate capability fast data output capability.

Pin Diagrams:

Applications:

1. Wearable Devices

2. Fitness Assistant Devices

3. Medical Monitoring Devices

For more info: Refer the Datasheets!

DATASHEET_MAX30100
DATASHEET_RCWL-9183

General Description:

An alternate name for this sensor is the heartbeat sensor or heart rate sensor. The working of this sensor can be done by connecting it from the fingertip or human ear to the Arduino board. So that heart rate can be easily calculated. The pulse sensor includes a 24-inch color code cable, ear clip, Velcro Dots-2, transparent stickers-3, etc.

Working Principle:

The pulse sensor working principle is very simple. This sensor has two surfaces, on the first surface, the light-emitting diode & ambient light sensor are connected, and the other surface contains the circuit responsible for noise cancellation and amplification. The LED is located above a vein in a human body like an ear tip or fingertip, however, it must be located on top of a layer directly. Once the LED is located on the vein, then the LED starts emitting light. Once the heart is pumping, then there will be a flow of blood within the veins. So, if we check the blood flow, then we can check the heart rates also. When blood flow is detected, the ambient light sensor receives more light reflected by the flowing blood. This small change within obtained light can be examined over time to decide our pulse rates.

Specifications:

1. This is a heartbeat-detecting and biometric pulse rate sensor

2. Its diameter is 0.625

3. Its thickness is 0.125

4. The operating voltage is ranges +5V otherwise +3.3V

5. This is a plug and play type sensor

6. The current utilization is 4mA

7. Includes circuits like Amplification & Noise cancellation

8. This pulse sensor is not approved by the FDA or medical. So, it is used in student-level projects, not for commercial purposes in health issues applications.

Pin Diagrams:

Applications:

1. This sensor is used for Sleep Tracking

2. This sensor is used for Anxiety monitoring

3. This sensor is used for remote patient monitoring or alarm system

4. This sensor is used for Health bands

5. This sensor is used for complex gaming consoles

For more info: Refer the Datasheets!

Datasheet_APDS-9008
LDO 3.3V