MAX30100 Pulse Oximeter Heart Rate Sensor Module MAX30100 Pulse Oximeter Heart Rate Sensor Module is an integrated pulse oximeter and heart-rate monitor sensor solution. It’s an optical sensor that derives its readings from emitting two wavelengths of light from two LEDs – a red and an infrared one – then measuring the absorbance of pulsing blood through a photodetector. This particular LED colour combination is optimized for reading the data through the tip of one’s finger. It is fully configurable through software registers and the digital output data is stored in a 16-deep FIFO within the device. It has an I2C digital interface to communicate with a host microcontroller. The pulse oximetry subsystem in MAX30100 sensor consists of ambient light cancellation (ALC), 16-bit sigma delta ADC, and proprietary discrete time filter. It has an ultra-low-power operation which makes it ideal for battery operated systems. MAX30100 operates on a supply in the range of 1.8 to 3.3V.It can be used in wearable devices, fitness assistant devices, medical monitoring devices, etc. The MAX30100 operates from 1.8V and 3.3V power supplies and can be powered down through software with negligible standby current, permitting the power supply to remain connected at all times.

MAX30102 Pulse Oximeter Heart Rate Sensor Module The MAX30102 Pulse Oximeter Heart-Rate Sensor Module I2C Interface provides a complete system solution to ease the design-in process for mobile and wearable devices. The MAX30102 operates on a single 1.8V power supply and a separate 5.0V power supply for the internal LEDs. Communication is through a standard I2C-compatible interface. The module can be shut down through software with zero standby current, allowing the power rails to remain powered at all times. The heart rate oximetry module made with the MAX30102 is an upgraded version of the MAX30100 that can be used to measure heart rate oximetry on the wrist. It can be applied to smart wear fields such as sports watches. MAX30102 is an integrated pulse oximeter and heart-rate monitor sensor solution. It’s an optical sensor that derives its readings from emitting two wavelengths of light from two LEDs – a red and an infrared one – then measuring the absorbance of pulsing blood through a photodetector. This particular LED colour combination is optimized for reading the data through the tip of one’s finger. It is fully configurable through software registers and the digital output data is stored in a 16-deep FIFO within the device. It has an I2C digital interface to communicate with a host microcontroller. The pulse oximetry subsystem in MAX30102 consists of ambient light cancellation (ALC), 16-bit sigma delta ADC, and a proprietary discrete-time filter. It has an ultra-low-power operation which makes it ideal for battery-operated systems. MAX30100 operates on a supply in the range of 1.8 to 3.3V. It can be used in wearable devices, fitness assistant devices, medical monitoring devices, etc. The MAX30102 operates from 1.8V and 3.3V power supplies and can be powered down through software with negligible standby current, permitting the power supply to remain connected at all times. read our blog on eye blinking sensor , which provides information about the working principle of an eye blink sensing system. Note: For this sensor, you have to pull up SCL & SDA Pin( You have to connect a 10Kohm resistor between SCL & 5V And Same as SDA to 5V) Applications: Fitness Assistant Devices Medical Monitoring Devices Wearable Devices

MAX3232 Mini RS232 to TTL Module The Serial Port RS232 to TTL 5V Signal Converter Module is a professional module for projects requiring PC/Laptop RS232 interface to 5V TTL logic. This module converts signals between RS232 voltage levels and TTL voltage levels. It is bi-directional, where TTL signals are converted to RS232 levels and RS232 levels are converted to TTL levels. It is ideal for use in pc interfacing, microcontroller-based projects, robotics, or for experimental and educational purposes. Check out the entire range of Development Board Accessories Pin-outs : – (0V) +(VCC 3.0~5.5V) TTL-TXD TTL-RXD -(0V) +(VCC 3.0~5.5V) RS232-RX RS232-TX

4 in 1 Dot Matrix Module (MAX7219) This is a Dot Led Matrix Module with a MAX7219 Driver chip. You will be able to add some great cool animation to your upcoming project by using this dot matrix display module. The individual module contains 88 LEDs, each of which is precisely controlled by the MAX7219 driver to produce the desired colour pattern. The main advantage of using this is that users will be able to control all 64 LEDs by simply connecting three output communication wires to microcontrollers such as Arduino , etc. It is also very simple to connect the two modules. Simply connect the previous breakout board's output pins to the new module's input pins, and you can connect as many DOT LED Matrix Modules to the Arduino as you want!!!  The MAX7219 Dot Led Matrix Module is a common-cathode serial input driver that connects microcontrollers to LED matrices. A 4-wire serial interface allows you to connect any common microcontroller to this module. Without refreshing the entire display, each output can be addressed. This module only needs three I/O lines to drive the display, making it ideal for microcontroller projects. To set the segment current of each LED, only one external register is used. Wiring instructions: The left side of the module to the input port, the right to an output port When the control of a single module, simply input port connected to the CPU When a plurality of cascaded modules, input and output termination CPU, an input terminal of the second output end of the first module a module, the first two modules of the input terminal of the three termination modules, and so on. Pin connection: Dot Matrix Display Module to the Arduino Vcc 5V GND GND DIN Pin 12 CS Pin 10 CLK Pin 11

MAX7219 8x8 LED Dot Matrix Display Module The MAX7219 is a serial input / output common-cathode display driver that is connected to a microprocessor and has an 8-digit 7-segment digital LED display that can also be connected to a bar graph display or 64 separate LEDs. To store each data, an On B BCD encoder with an on-chip, multi-channel scanning loop word drive and an 8 x 8 static RAM is used. To set the current of each LED segment, only one external register is used. All general-purpose microprocessors can be connected using a simple four-wire serial interface. You can also use this display module in your Arduino project as well. Each data can be addressed in the update, which eliminates the need to rewrite the entire display. MAX7219 Dot Led Matrix display also allows the user to choose whether to code or not code each data point. The Dot Led Matrix display includes a 150A low-power shutdown mode, analogue and digital brightness control, a scan-limit register that allows the user to display 1-8 bits of data, and a let all LED light detection mode. A dot-matrix can be driven with only three IO ports! Flicker-free dot-matrix display! Cascades are supported! Pin connection: Dot Matrix Display Module to the Arduino Vcc 5V GND GND DIN Pin 12 CS Pin 10 CLK Pin 11 Applications: Bar-Graph Displays 7-Segment Displays Industrial Controllers Electronic Panel Meters LED Matrix Displays Display symbols, simple graphics, and texts.

MB102 830 Points Solderless Breadboard An MB102 830 Points Solderless Breadboard is an exceptional tool for experimenting with circuit designs whether in the R&D or university lab. This MB102 830 points solderless prototype PCB breadboard is used to make up temporary circuits for testing or to try out an idea. No soldering is required so it is easy to change connections and replace components. For the connection, you can use jumper wires. This solderless breadboard can be used with Arduino and other microcontrollers. Also, check the Breadboard Power Supply (3.3V-5V). Features: Compatible with resistance, diodes, transistors, LEDs, capacitors, and other electronic components Completely reusable Colored coordinates for easy component placement 830 solder-less points Accepts a variety of wire sizes (20-29 AWG) Get insights into What is Breadboard and its uses. Application: Prototyping Projects Educational Tool Rapid Prototyping Testing and Debugging DIY Electronics

MB20 - 20mm Average PCB Mounting CT Buzzer An audio signaling device like a beeper or buzzer may be electromechanical or piezoelectric or mechanical type. The main function of this is to convert the signal from audio to sound. Generally, it is powered through DC voltage and used in timers, alarm devices, printers, alarms, computers, etc. Based on the various designs, it can generate different sounds like alarm, music, bell & siren. Applications: Electrical alarms Educational purposes Security applications Electronic Metronomes Household applications

MB20 – 11mm PCB Mounting CT Buzzer (12V) The MB20 – 11mm PCB Mounting CT Buzzer is a compact, reliable, and easy-to-integrate audio indicator designed for a wide range of electronic circuits. Operating at 12V with a clear continuous tone, this buzzer offers stable performance for alarms, notifications, safety indicators, and embedded systems. Its compact 11mm pitch makes it ideal for tight PCB layouts, while its sturdy construction ensures long-term durability. Built for consistent sound quality, the MB20 delivers a loud output of 85 dB with a stable 4 KHz frequency, making it suitable for consumer electronics, home appliances, DIY projects, and industrial equipment. With low power consumption, a wide 1.5–27V operating range, and simple PCB mounting, this buzzer is an excellent choice for engineers and hobbyists building audio alert systems. Features: Compact 11mm pitch design fits easily into small PCB spaces. Produces a loud 85 dB continuous tone suitable for clear audible alerts. Wide operating voltage range of 1.5V to 27V, offering flexibility for multiple circuits. Durable ABS housing ensures long-lasting performance in various environments. Low current consumption (max 15 mA) for efficient operation in battery-powered devices. Easy-to-mount PCB design with 8mm lead length for quick installation.

MB27A - 27mm Average Continuous 1.5V to 27V DC An audio signaling device like a beeper or buzzer may be electromechanical or piezoelectric or mechanical type. The main function of this is to convert the signal from audio to sound. Generally, it is powered through DC voltage and used in timers, alarm devices, printers, alarms, computers, etc. Based on the various designs, it can generate different sounds like alarms, music, bells & sirens. Applications: Electrical alarms Educational purposes Security applications Electronic Metronomes Household applications

MB27F - 27mm Flat Loud Continuous Buzzer An audio signaling device like a beeper or buzzer may be electromechanical or piezoelectric or mechanical type. The main function of this is to convert the signal from audio to sound. Generally, it is powered through DC voltage and used in timers, alarm devices, printers, alarms, computers, etc. Based on the various designs, it can generate different sounds like alarm, music, bell & siren. Applications: Electrical alarms Educational purposes Security applications Electronic Metronomes Household applications Also check the MB27M - Maruti 27mm Musical Buzzer . It discusses the features of the buzzer, including its operating voltage, size, and compatibility with other microcontrollers. The buzzer is small and can be easily mounted on a breadboard or perf board.