Heart Rate Monitor Using Microcontroller

Heart Rate Monitor Using AT89S51

     This article is about simple heart rate monitor using 8951 microcontroller. The device sense the heart rate from fingertip using IR reflection method and displays it on a three digit seven segment display in beats per minute. The circuit has an accuracy of four beats per minute and it is very easy to use. In medical terms, the technique used here for sensing heart rate is called photoplethysmography.

NASA Robots

NASA Robots

       NASA has innovated and designed special robots which can aid them in doing tasks in dangerous environments. The most common works that are done by these robots are the repair of radiation exposed machines, capturing videos in outer space, getting into minute places inside the space craft where astronauts cannot enter and so on. In some cases, the researchers in NASA have even created robots that almost resemble to human beings in the physical structure and also the different degrees of freedom. Some of the robots that were designed by NASA are described below.

Anthropomimetic Machines - The Humanoid Robots

Anthropomimetic Machines

        The Robotics technology has become highly advanced to such a level that even people who have routine jobs [in industries] are replaced by robots. Though the initial cost of such robots may be high, the overall gain will be huge when compared to manual labour. To us, robots are just machines with two arms and two legs which are connected together by nuts and bolts.

Tension Indicator (Lie Detector)

TENSION INDICATOR