Abstract:
This paper presents the basic principles, design and implementation of a heart bioelectric signals acquisition
module. Electrical derivations are taken and signal treatment, then enter to present on the computer monitor on the
parallel port. The module consists of different blocks: block signal processing where it is amplified, filters, and
adds a DC voltage so that is ready to enter the next stage that digitalization; this stage of digitalization is
composed of microcontroller PIC16F877 that takes three signals and digitizes them according to the receiving
computer sync signal. Once entered the signals for the parallel port, are presented in a graphical interface
developed in Visual Basic, it displays three established derivations.
