Circuits & Schematics - Medicine: lie detector polygraph

1. Simple Lie Detector
   Circuits Medicine Security
   .. a simple lie detector that can be built in a few minutes, but can be incredibly useful when you want to know if someone is ...
   Dec 8, 2007

2. Easy Pulse: A DIY photoplethysmographic sensor for measuring heart rate. Part 1 - Theory and Schematic
   Circuits Measurement Medicine Microcontrollers Usage
   .. of TCRT100 simplifies the build process of the sensor part of the project as both the infrared light emitter diode and the detector are arranged side by side in a leaded package, thus blocking the surrounding ambient light, which could ...
   Nov 30, 2012

3. Simple pulse oximetry for wearable monitor
   Circuits Analogue Design Medicine Linear Technology LT6003
   .. amplifier with a gain of 30. The negative input of comparator IC4 is connected to the modified signal using the peak detector circuit. Components IC3, D1, and C6 are used to detect and hold the maximum voltage of the input signal. ...
   Jul 3, 2015
4. ATtiny85 Pulse Oximeter and Photoplethysmograph
   Circuits Arduino Measurement Medicine Microcontrollers Usage ATtiny85 SSD1306 MAX30102
   .. is a moving average filter which acts as a low pass filter to remove transients before the signal is input to the beat detector. The waveform after each of this filters can be displayed, however, in general the unaveraged waveform is ...
   Apr 15, 2020

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