Biomedical Project: Heart Beat Monitor using 8051 Controller

Explore how a non-invasive optical sensor using photoplethysmography detects pulse by light absorption in arteries, converting analog signals to digital for MCU counting and LCD display.

Explore how 8051 timers operate, using the tmod register to control timer0 and timer1 in 16-bit mode with eight-bit auto reload, including software and hardware methods and pulse counting.

Learn how to generate a 50 ms delay using 8051 timer zero in mode 1 by loading 16-bit counts into TL0/TH0, starting via TR0 and monitoring TF0.

Develop a one-second delay on an 8051 by combining twenty 50 millisecond timer waits using timer zero in mode one, with a clear hardware and software approach.

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Learn the lcd 16x2 pinout and interface basics, including vss, vdd, vo potentiometer, rs, rw, enable, and d0–d7, and operate the display in eight-bit mode with simple prototyping in Proteus.

Display a single character on lcd with an 8051 by wiring data and enable pins, sending commands (0x38, 0x0c, 0x80) and data, and using port 3 as output with delay.

Display a string on an lcd with an 8051 microcontroller. Explore lcd cmd, lcd data, and the lcd str pointer to show hello.

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Simulate the heart beat monitor circuit in Proteus, detailing the circuit diagram with a sensor, 8051 controller, and LCD, and show how timer1 processes port3 input to LCD output.

Set up the heart beat monitor project by declaring header files and function prototypes, defining input/output pins, and outlining LCD interfacing and timer-based delays for the 8051 controller.

Expand the declared functions for the 8051 heart beat monitor project by detailing input and output port declarations, delay, and lcd command and data routines that drive the display.

Learn the main function of an 8051 heart beat monitor, wiring LCD, and using timer zero for timing and timer one as a counter to count pulses over 60 seconds.

learn how to create a one-minute timer on 8051 by looping 1000 cycles of a 60 ms delay, configuring timer 0 with 0x27FC, and polling TF0.

Learn a hex-to-ascii converter function to display pulses from a heart-beat sensor on an LCD. Update the display every minute using timer TL1 and LCD commands like 0xC0 and 0x0.

Simulate the entire heart beat monitor project on an 8051 controller, burn code, and understand timer and counter modes, LCD interfacing, and core project logic.

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