Arduino USB Host Shield V 2.0 (ADK for Arduino) Wireless RF Kit 433 Mhz The internal 10-step divider is

The internal 10-step divider is floating and can be referenced to a wide range of voltages

supports HR

This sensor has a high sensitivity and fast response time

Switching circuit

CD4512 - 8 Channel Data Selector

Arduino USB Host Shield V 2.0 (ADK for Arduino) Wireless RF Kit 433 Mhz The internal 10-step divider isIntroduction : USB Host Shield is an add on board for Arduino development platform. The shield provides USB Host interface, allowing full and low speed communication with USB devices keyboards, mice, joysticks, MIDI, digital cameras, Bluetooth, and many others. Thanks to new interface layout it is now compatible with more Arduinos not only UNO and Duemilanove, but also big Mega and Mega 2560 work with Standard variant of this shield out of the box. No