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Check the pin labels on the Finger Clip Heart Rate Sensor and match them to your controller voltage
and control method of this part with the rest of your setup before full-power testing
or an SMS-controlled build
Both chips use I²C
depending on how you plan to power
DFRobot LM2577 DC-DC Boost Converter 3.7V to 34V bluetooth 4.0 Check the pin labels onDC DC Boost Converter. This is a multipurpose boost converter, a breakout board. The supply voltage is as low as 3. 7v and it boosts to as high as 34v. With this module, you can now power your Arduino with our 3. 7V LiPo battery or use it to regulate any other project. The tiny form factor and its simplicity make it a very nice addition for all projects requiring an extra power module. NOTE: This board does not have reverse polarity protection, so
