Heart Rate Monitor

[#1]

• Description
• Block Diagram
• Products
• Related Documentation
• Related Software
• Related Demos from Communities

Description

This heart rate monitor is based on NXP’s KW41Z, an ultra-low-power BLE-enabled MCU that provides all the capabilities for acquiring, processing and sending data obtained from analog sensors. NXP also offers a battery charger IC, RTC and LED controller for a complete heart rate monitor solution.

Block Diagram

Products

Category Name 1:	MCU
Product URL 1	https://www.nxp.com/products/wireless/thread/kinetis-kw41z-2.4-ghz-dual-mode-bluetooth-low-energy-an...
Product Description 1	The KW41Z is an ultra-low-power, highly-integrated single-chip device that enables Bluetooth® Low Energy connectivity, The KW41 also has a 16-bit ADC for data acquiring and a 6-bit High-Speed Analog Comparator. If needed the KW41Z also has AES-128 Accelerator (AESA), True Random Number Generator (TRNG) for an end-node secure.

Category Name 2:	Battery Charger
Product URL 1	https://www.nxp.com/products/power-management/battery-management/battery-chargers/1.2-a-single-cell-...
Product Description 1	The MC34673 is a cost-effective fully-integrated battery charger for Li-Ion or Li-Polymer batteries. It tolerates an input voltage up to 28 V, which eliminates the input over-voltage-protection circuit required in handheld devices.

Category Name 3:	Real-time clock/calendar
Product URL 1	https://www.nxp.com/products/peripherals-and-logic/signal-chain/real-time-clocks/rtcs-with-spi/spi-r...
Product Description 1	The PCF2123 is a CMOS Real-Time Clock (RTC) and calendar optimized for low power applications. Data is transferred serially via a Serial Peripheral Interface (SPI-bus) with a maximum data rate of 6.25 Mbit/s.

Category Name 4:	GPIO Expander
Product URL 1	https://www.nxp.com/products/interfaces/ic-spi-serial-interface-devices/ic-general-purpose-i-o/low-v...
Product Description 1	NXP® I/O expanders provide a simple solution when additional I/Os are needed while keeping interconnections to a minimum. The PCAL6408A provides remote I/O expansion for most microcontroller families via the I²C-bus interface.

Category Name 5:	LED Driver
Product URL 1	https://www.nxp.com/products/power-management/lighting-driver-and-controller-ics/ic-led-controllers/...
Product Description 1	The PCA9633 is one of the first LED controller devices in a new Fast-mode Plus (Fm+) family. Fm+ devices offer higher frequency (up to 1 MHz) and more densely populated bus operation (up to 4000 pF).

Related Documentation

Document URL	Title
https://www.nxp.com/docs/en/application-note/AN10441.pdf	Level shifting techniques in I2C-bus design
https://www.nxp.com/docs/en/application-note/AN11247.pdf	Improved timekeeping accuracy with PCF85063, PCF8523 and PCF2123 using an external temperature sensor
https://www.nxp.com/docs/en/application-note/AN5377.pdf	Hardware Design Considerations for MKW41Z/31Z/21Z BLE and IEEE 802.15.4 Devices
https://www.nxp.com/docs/en/application-note/AN12059.pdf	FRDM-KW41Z RF System Evaluation Report for BLE Applications

 

Related Software

Related Software URL
Kinetis Microcontrollers
MCUXpresso SDK

 

Related Demos from Communities

Related Demos URL
https://community.nxp.com/docs/DOC-340031
https://community.nxp.com/docs/DOC-334895
https://community.nxp.com/docs/DOC-334892
https://community.nxp.com/docs/DOC-331647
https://community.nxp.com/docs/DOC-101403