DIY Arduino Powered Lie Detector

In this video I hope to show you how to use an Arduino and a natural human skin response to see if someone is lying :D

Follow me on Instagram: @electronics_for_everyone

song used
RetroVision - Puzzle [NCS Release]
RetroVision

[kale]

Duuuude that's freakin awesome. Your videos are improving so much too!

[ChickenTyrant]

What does the micro controller do, I a new to this type of stuff so I dont know much, but I didnt see you put one on the lie detector. Thanks in advance















Great video btw

[danielmoney]

How the hell do i connect led without the breadboard??

[chzbllz]

you are an literal life-saver! I'm 100% gonna success in my project, I love your work :D

[jen-cxev]

I tried opening the serial plotter, but I can't find the "tools" button anywhere, is it because of an update or something? If it's not available anymore can I use something else instead? This is actually very urgent, and I would be extremely greatfull for some help. Thank you for your time.

[antonellamaneiro]

Hi! Sorry to bother you again but I have another question. Sometimes, the serial plotter graph's average is a straight line at 0. When making the finger clips, we used tape to connect the wire to the aluminum foil. Does that have anything to do with it?

[mhasetolohe]

Got third in my college during science model competition with this …👍

[tescilia]

dont we need the programming codes to access the arduino?

[webcreater-vtpp]

hi there is no coding in there can u share it now with the coading linkPLEASE

[MrSirChristian]

To anyone struggling to find the code since its not in the description or in that link he posted... Here it is:

void setup()
{
Serial.begin(9600);
pinMode(2, OUTPUT);
pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
digitalWrite(2, HIGH);
delay(500);
digitalWrite(3, HIGH);
delay(500);
digitalWrite(4, HIGH);
delay(500);
}

void loop()
{
if (analogRead(A0) > 60)
{
digitalWrite(4, HIGH);
}
else
{
digitalWrite(4, LOW);
}
if (analogRead(A0) > 20)
{
digitalWrite(2, HIGH);
}
else
{
digitalWrite(2, LOW);
}
if (analogRead(A0) > 45)
{
digitalWrite(3, HIGH);
}
else
{
digitalWrite(3, LOW);
}


delay(20);
}

[hoku_ar]

Can I make it with a smaller and with less connections protoboard?

Edit: Other question, what if I haven't a welding machine?

[TheAppleProfessional]

What kind of cables do I need to build this and where can si buy them? You did not specify the type of cables or anything like that. When you search up cable, a bunch of things come up. Which cable should I get?

[apaarrao]

for connecting the LEds to the aurdino without using the breadboard, i connect the anodes with the specific digital pins but all the cathodes have to be connected to the same pin, GND .
how do i do that?
cant use jumper wires

[bimaladhakal]

My plotter suddenly goes to 280 sometime without my finger on exposed wire, how could I solve that?

[csicee]

I average 1-5 on my graph? I am using arduino uno

[modusvivendi]

Hello, very nice project :) i tried it myself, but i am getting much lower values than yours, in the range 2-5.. am i doing something wrong?

[emergirco]

Doing this project in 2021! I managed to get it all working (although it was a bit challenging due different info on video and instructable page). Still, now I'm wondering what exactly I'm seeing on the graph. I've read through all comments here and from I got it seems that this set up is actually measuring my skin's voltage, is that correct? In other words, what is the exact unit of the data being plotted? Knowing this would be very helpful to my research, as I intend to use this project on plants and fungi. Thank you for all the work!

[deleon]

can you program a gsm module to receive messages and process them into a pic to eject a program that turns on lights through commands on the txt messages

[PrizvanieNSG]

i am use a 2k ohm resistor and uno but get smt about 0-5. Can u help me? Whats wrong?

[antonellamaneiro]

Hi, very cool project. I am trying to recreate it with an arduino uno and my normal serial plotter graph range is about 1000-1200 with a 2k resistor; is that normal?