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to insulate the front of the Pulse Sensor from oily fingers and sweaty earlobes
it also has a Microchip PIC microcontroller
Display area: 7mm x 25mm
logic level shifting for the Reset and I2C pins
Just be aware that the charge rate is 1000mA max
Adafruit Feather 32u4 with RFM69HCW Packet Radio - 433MHz LiIon & LiPoly to insulate the front ofFeather is the new development board from Adafruit, and like its namesake it is thin, light, and lets you fly! We designed Feather to be a new standard for portable microcontroller cores. This is the Adafruit Feather 32u4 Radio (RFM69HCW) 433MHz our take on an microcontroller packet radio transceiver with built in USB and battery charging. Its an Adafruit Feather 32u4 with a 433 MHz radio module cooked in! Great for making wireless networks that can