Using MBED to check Heart Beats

Abstract

Abstract. In this project, the mbed NXP LPC1768, the sensor TCRT 1010, and the LED Driver Max7219, LED screen and the PCB are used to show the pulse. The optical sensor can measure the pulse when a finger is put on it. The flowing blood in our fingers can reflect the light back to the sensor and different velocity of the blood means different pulse and will lead to different output voltage signal of the sensor so that we can measure our pulse. A circuit is built to be a filter and the mbed is used to analysis the data and display the ratio and the shape of the pulse.