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Experiment #7:Introduction to Soldering Techniques and Biomedical EngineeringJim TronoloneECE 2110-31: Circuit TheoryZhehan YiOctober 27, 2015
1.IntroductionThe purpose of this experiment was to learn how an ECG and ECG amplifier work and thenmeasure the waveform using a digital oscilloscope. 2.Background InformationFormulas used in this experiment:V = I * REquation 2.1– Ohm’s Law EquationReq= R1+R2+…+RnEquation 2.2– Equivalent Resistance of Resistors in SeriesReq= (1+ 1+…+1 )-1R1 R2RnEquation 2.3– Equivalent Resistance of Resistors in ParallelCircuit Schematics:Circuit Schematic 2.13.Methods and MaterialsEquipmentComponents(1) Agilent DSO1024A Digital Oscilloscope (1) 180 Ohm Resistor(1) BioAmplifier Kit(1) Red LED(1) Solderless Breadboard (1) BNC to BNC cable (1) BNC to mini grabber(3) Disposable Electrodes(1) Electrode GelTable 3.1 – Experiment #3 Equipment and Component List4.Experimental ProceduresExperiment #6 Page 2 of 5Jim Tronolone
4.1 – Setting Up the ECG BioAmplifierPower on the amplifierTurn the “Balance” dial until the needle is centered, and set the amplification to maxSet the high frequency roll-off to 50 Hz and the low frequency roll-off to 0.1 HzConnect the lead box to the amplifierAttach electrodes to the ends of the leads, and attach the ground to the subject’s right hip, the positive to the area directly below his left pectoral, and the negative to the area directly below his right collarboneTurn on the digital oscilloscope, and connect it to the amplifier by using a BNC to BNC cableAdjust the volts/div and sec/div until a signal that resembles a PQRST wave appears on the displayRecord the Vpkfor use in Part 4.2 in Data Table 5.1