AD8232 heart rate monitor - Sparkfun

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The AD8232 is a heart rate monitor module from Sparkfun. It is a much cheaper alternative to medical equipment, allowing the measurement of heart electrical activity. It works in a similar way to an electrocardiogram, sending a filtered analog signal to the output connector. Since EKG signals are very weak, the module has a built-in amplifier that allows these signals to be distinguished from the background. The signals are also filtered with a special filter that further reduces the influence of background noise on the data. Wires for the desired connectors can be firmly soldered to the main board's solder pads SDN, LO+, LO-, OUTPUT, 3.3V, and GND, and the module also has additional pads for reading limb measurement readings (RA (Right Arm), LA (Left Arm), RL (Right Leg)) from additional sensors that may be used.

Note: To use the module, biomedical adhesive electrodes and wires for muscle signal stickers are required, which are not included in the kit. The product is not intended for medical use, only for amateur exploration.

Specifications
●    Power and logic signal voltage: 3.3V DC
●    Signal type: analog.
●    LED indicators show the measured heart rate
●    Measurement wire connector: 3.5 mm

Applications and references:
●    Measurement of heart signals
● User manual
● Connecting the connectors
● Video overview