SparkFun Rotary Switch Potentiometer Breakout Boards, Sparkfun Originals Capacitive This Singe In-Line component is

This Singe In-Line component is actually 5 individual 330 Ohm resistors that share a common terminal on pin 6 (denoted with a black dot)

GitHub (Design Files & Example Code)

and Cat6 Ethernet cables

It essentially combines a simple optical heart rate sensor with amplification and noise cancellation circuitry making it fast and easy to get reliable pulse readings

SparkFun Rotary Switch Potentiometer Breakout Boards, Sparkfun Originals Capacitive This Singe In-Line component isThe SparkFun Rotary Switch Potentiometer Breakout is a small board the allows you to add resistors to a 10 position rotary switch, turning it into a potentiometer with 10 discrete steps. Multiple applications require potentiometers that are hard to find due to specific resistance values or custom tapers, the Rotary Switch Potentiometer board allows you to populate your own resistors to help match situations where ordinary parts aren? t available or