zt07elecfreaks 发布于2018-01-16 17:21
Make A Lie Detector Machine with ElecFreaks Micro:bit Tinker Kit
With this machine, the truth will never escape you! As long as you can make your subject hold a moisture sensor for a while.
This tutorial was contributed by Samuel Ong from Raffles Institution.
Step 0 – Pre Build Overview
In this project, we will create a simple lie detector machine, which works by measuring the electrical conductivity of our skin. Upon feeling nervous, our skin's electrical conductivity will increase, and the moisture sensor can pick up on that. This allows us to determine if a person is telling the truth or not.
1 x BBC micro:bit
1 x Micro USB cable
1 x Breakout board
1 x Octopus OLED
1 x Moisture Sensor
Tips: If you want all components above, you may need ElecFreaks Micro:bit Tinker Kit.
First of all, plug in the soil moisture sensor. Match the colors and note down what pin you plug for it will influence later procedures.
We'll need to add a package of code to be able to use our kit components. Click on "Advanced" in the Code drawer to see more code sections and look at the bottom of the Code Drawer for "Add Package".
Step 3 – Coding
First of all, initialize the OLED using blocks in the OLED section as shown in the picture
Step 4: Using It
First of all, you will have to attach each prong of the soil moisture sensor to one of your fingers. Personally, I found that using rubber bands was a simple and effective way to do so. You can experiment with different methods, such as using crocodile clips or tape.
Voila! Now you can test lies with this machine easily.
This article is from Tinkercademy Basic Lie Detector.
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