Fig. 1 | Journal of Infrared, Millimeter, and Terahertz Waves

Fig. 1

From: A Robust Protocol for In Vivo THz Skin Measurements

Fig. 1

Diagram of the circuit used to integrate a pressure sensor with the TeraPulse 4000 main unit and a flow chart describing the code used by the Arduino microcontroller to implement this. V1 and V2 are the output voltages from the responses of the two force-sensitive resistors, and VL and VH are the lower and higher threshold voltages for the pressure sensor to respond to respectively. When the voltage is between VL and VH, a pink light is shown to the subject and a binary signal is recorded alongside the THz response to aid processing

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