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Heart Beat Monitor Project’s Aim: - To build a device using avr to measure the heart beat on fingertip using simple electronics components and to improve its accuracy, user interface and displaying the results on LCD/seven segments. Description- heart beat measuring device was built using avr atmega32 . when our heart beats,blood intensity increases in our finger tip hence more reflected light falls on photo-diode giving us some voltage which we can give across some resistance and use that voltage to calculate Heart Beat.

Problems Faced:-The most challenging problem was to set the accuracy…the accuracy was very less due to the poor hardware.. Hardware requires a robustly built and sturdily done soldering …PCB is preferred over GCB but that isn’t possible in first year so we will go for GCB. Also the good quality optical sensor is preferred. I had used USART and had shown the output on laptop’s monitor using a COM port software called X_CTU. . However we can use LCD /seven segment to display the heartbeat. Components required : - ATmega32,IR LED, photo diode,LM324 op-amp, 1k-ohm resistance,100k-ohm resistance,led,16*2 LCD,GCB,wires,7805 voltage regulator,battery,push bottons,switch,potentiometer etc. Difficulty level - Medium Skills required:- Intermediate C/C++ programming Familiar with AVR Good soldering skills High Patience