Patent ID: 8121672

Claim:
A heart rate monitor, comprising: a monitor case; a case back configured to sense an electro-cardiogram signal and connected to the monitor case; a conducting clamp securing a battery, the battery having positive and negative terminals, the positive terminal connected to the conducting clamp; heart rate monitor circuitry for detecting a heart rate of a user, the heart rate monitor circuitry comprising a pull-down port, a voltage input and a ground terminal; a push button connected in a path between the pull-down port and the conducting clamp; and a first resistor connecting the voltage input of the heart rate monitor circuitry to the conducting clamp and to the positive terminal, the first resistor is configured to dissipate at least a portion of an electrostatic discharge from the conducting clamp, and the monitor case contains the heart rate monitor circuitry, conducting clamp and first resistor.