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This application report describes a low-cost heart-rate monitor solution based on the MSP430™ LaunchPad Value Line Development Kit (MSP-EXP430G2), which uses the MSP430G2xx microcontroller (MCU). A daughterboard amplifies and filters the electrocardiogram (EKG) signal before it is sent to the MCU for sampling and processing. The heartbeat-per-minute data is sent to the PC by means of the back-channel UART-over-USB available on the LaunchPad. Additionally, an eZ430 radio frequency (RF) target can be connected to the six-pin header on the daughterboard to transmit data wirelessly via the SimpliciTI™ network protocol. The system can be powered by either universal serial bus (USB) power, a CR2032 3-V coin cell, or two AA or AAA batteries.

WARNING: The application presented here is for reference design purposes only and is not intended for any life-saving or medical-monitoring use.

Project collateral and source code discussed in this application report can be downloaded from the following URL: