1. Lab 4 An Oximeter
2. Introduction
The purpose of this lab is to measure our pulse using an oximeter
3. Materials and Methods
To build the circuit for this lab, two capacitors, five resistors, one
1N4370 zener diode, two 1NA 128 PA instrument amp, a 741 op amp, a LED
light, and IR pair were used. The data sheets for the IR pair and the
amplifiers were looked up to make sure they were being used correctly.
The circuit was hooked up to the function generator to see if the pulse
was being measured. Once that worked a code was written in Ardino and
the signal was measured and recorded in that aswell.
4. Results
Figure 1: The signal of the pulse shown in the function generator
Figure 2: A video of the pulse in ardino Figure 3: The circuit on the bread board that amplifies the signal of the pulse
5. Discussion
This lab utilized three different amplifiers, a high pass filter and a
low pass filter to measure our heart beat. The TCRT5000 IR pair was
used to actually measure the heart beat and the rest of the circuit was
used to amplify the signal so it was visible.
