Due to limited module biopac MP30 and there is no substitute modules used in the electronics lab Medika, making inefficient implementation Medika electronics lab. So that created an ECG and EMG module with output display on a PC. In making this ECG module required an instrument amplifier with 5000 times reinforcement, notch filter with cutoff frequency of 50 Hz to filter noise caused by the grid PLN, Low Pass Filter with cutoff frequency of 40 Hz to filter noise carried by strengthening signal, an ADC0804 to convert analog signals generated into a digital signal from amplifier circuit and a minimum system with a series of RS232 AT89S51 for communication with a PC. From the ECG module test results are made compared with the measurement with MP30 biopac module obtained errors in the BPM that produced by 24.7% and for the resulting amplitude R signal has an error of 19.9%. Keyword : Instrument Amplifier, Low Pass Filter, Notch Filter, Minimum System
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