PulseSensorRing.brd

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2 layer board of 1.20x0.60 inches (30.48x15.27 mm).
Shared on July 19th, 2016 22:50.

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MAX30100-Adapter

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2 layer board of 0.78x1.00 inches (19.71x25.27 mm).
Shared on July 10th, 2016 03:56.

Version 1.0 MAX30100 adapter for a wrist-worn heart monitor

https://github.com/hoilett/Arduino-Fitness-Band.git

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2 layer board of 2.00x2.21 inches (50.80x56.13 mm).
Shared on July 9th, 2016 01:34.

Pulse sensor with auto calibration for each user. Completely analog. No microcontroller.

https://hackaday.io/project/12433-pulse-sensor-with-autoadjusted-threshold

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2 layer board of 1.30x1.46 inches (33.02x37.16 mm).
Shared on June 1st, 2016 01:53.

Version 2.0 of Arduino walkie talkie using nRF24

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2 layer board of 1.21x1.31 inches (30.73x33.27 mm).
Shared on May 13th, 2016 14:01.

Version 1.0.0 of light sensor circuit for Bit the RoboDawg.

http://www.instructables.com/id/Bit-the-RoboDawg-Version-10/

Tested and works.

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