Welcome back to Science and Technology Center, Honesty is a very needed by people who believe that sin exists, because the honesty of our lives will feel peace and not have the burden of thinking in life. Honesty is a very costly behavior, so the money was not able to buy it. Looking for honest people not as easy as turning the palm of our hands, and it has become a phenomenon of mystery in life. And I'm sure those of you who read this article also never committed any sin, namely: "lie". True or not I think depends on your conscience each.In my post this time will try to make a tool that may be helpful for you in solving a problem in our daily life. The tool that we will make time is "The Lie Detector Tool". The tool that I made this time is helpful for you who need help if we are desperate position and want to know the real situation. The circuit is very simple and easy to obtain supporting components on the market. Or if you have used electronic goods such as: radio, walkman, tape compo, lighting efficiency is damaged and no longer used please use it to try to make a series of detectors honesty if you feel your friends, coworkers, and your boyfriend have suspicious gestures might even play around in the back without our knowledge.The components needed are:1. Transistor NPN type >> in a pilot project using TR series BC5472. 2 pieces 1 M ohm resistor3. 10 K ohm resistor4. Resistor 47K ohm5. Resistor 470 ohm6. Ceramic Capacitor 100 nF7. Trimpot / VR 50 K potentiometer* Note: If you can not read the resistor value you can see the code hereThe core of the lie detector circuit is the three NPN transistors and circuits Type R, C (resistor and capacitor) as a passive component to resistance occurs at the probe tip of the finger. Schematics lie detector can be seen in the figure below:
Download Skema :
Lie Detection Tool
Password : asinan
The principle works is very simple that the finger is the most porous in the body and is very sensitive to the measured resistance value caused by the pressures experienced by the man who would be detected by the change in resistance values result from sweat. The more people we sweat and fear of detection fault indicator LED 2 will light up red and it was a gaffe, and that person can be said to be guilty.
This tool does not fully respond 100% accuracy in the assessment of the actual truth, but at least it can help us in solving the problem and deserves to be tried to increase knowledge in the world of electronics and daily life. As to tips for this tool works well to give the question - a question that can cause prospective defendants to distressed securities and sweating, use a loud tone during interrogation. To set the sensitivity of these devices turn trimpot or potentiometer VR 50 K according to your needs.
