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Description: This is a wonderful evaluation board cooperatively designed by danjuliodesigns and SparkFun. The Heart Rate Monitor Interface (HRMI) is an intelligent peripheral device that converts the ECG signal from the Polar Heart Rate Monitor (HRM) into easy-to-use heart rate data. It implements a sophisticated algorithm for computing an average heart rate even with noisy or intermittent data from the transmitter.

Note: This product is a collaboration with Dan Julio. A portion of each sales goes back to them for product support and continued development.

Features:

• Multiple interfaces: USB, Logic-level serial and I2C
• Dual heart rate processing algorithms: averaged and raw
• Uses the RMCM01 Polar OEM receiver
• Compatible with coded and non-coded Polar transmitters including T31, T31C, T61C and Wearlink®
• 32-entry heart rate data history buffer
• Four 8-bit ADC inputs
• Up to a 5 channel digital input/output utility port
• Simple command/response interface
• Programmable power-on default operation
• Only works with one transmitter (HRM) in range

Applications:

• Custom exercise equipment
• Portable heart rate monitoring devices
• Bio-feedback devices
• Heart beat aware body-worn electronics

Documents:

• Schematic
• Datasheet (RMCM01)
• Manual
• Example software (checkout Dan’s impressive example applications!)
• danjuliodesigns.com
• Bildr Tutorial
• GitHub (Design Files)