How to Make a Portable Handy Lie Detector in Altoid Tin

365,706

448

187

Hi. I'm paewookyung, and this is my first posting in this site. please take note that
english is not my mother tongue. so please understand some of my gramatic mistake.;

Anyway, let's get this started!
This is a portable lie-detector built in Altiod tin. maybe you could have some fun useing this thing.

note: this detector is less sensitive then a real one. this could be miss some (many) of the lies.

Teacher Notes

Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.

Step 1: Things You'll Need.

You will need some things below for this project.

1. circuit board
2. 10K& resister
3. 47K& resister
4. 470& resister
5. 1M& resister x2
6. 47K& VR
7. knob for VR
8. 2N3904 transistor x3
9. 0.1 ? mylar cap
10. slide switch.
11. 9V bettery snap
12. LED (one red, one green)
13. solding tools.
14. drill
15. basic tools,
16. valcro
17. aluminum foil
....and most of all, Altoid tin!

Step 2: Make a Finger Pads

make a finger pads by sticking a aluminum foil to the valcro.
And don' forget to stick a wire between the valcro and thw foil!

Step 3: Solding the Circuit

Solder the circuit as a diagram below. And before solding the circuit, cut the circuit board to

suitable size to fit in the Altoid tin

Step 4: Drilling the Altoid Tin

Drill the Altoid tin for a VR.

and DO NOT use a sharp-end drill bit. it will tear the tin into half.

Step 5: Put the Floor Sheet

Put the floor sheet in a floor of the tin to avoid circuit from 'shorting'.

and secure is with a glue.

in my case, I used a piece of box, and secure with a hotmelt.

Step 6: Put Everything in Order.

Put everything in a Altoid tin and secure all of them with a glue, hotmelt, E.T.C

Step 7: Done.

Now your lie detector is ready to go. first, put the finger pad to the finger of the 'suspect'
then, slowly, turn the VR until the 'true' LED is light, and the 'false' LED is dark.
then, ask a question to the suspect , when the false LED get light, the suspect is lying.

Step 8: Enjoy!

Just Enjoy that detector. but take this in your mind, this may not be detect lie so perfectly.



And sorry about mistake the 'welcome' to 'walcome' is the photos.


So...have fun.....

Share

Recommendations

  • Indoor Lighting Contest

    Indoor Lighting Contest
  • Metal Contest

    Metal Contest
  • Make It Fly Challenge

    Make It Fly Challenge

187 Discussions

0
None
MalakA12

Question 7 months ago

What measurement of the circuit board

0
None
irontrooper0777vishnu 1962001

Reply 10 months ago

If you're like most people, lying makes your heart race. It makes you pant. It drives up your blood pressure and makes you drip sweat. A polygraphmachine detects lies by looking for signs of these physiological changes.

0
None
HookEmNoah

Question 1 year ago on Step 1

Where did you get the circuit board?

0
None
TechWhizz2919372

Answer 1 year ago

Huh. I think it may be an engineering or hardware store. But I am not entirely sure about that. Maybe you should consult a STEM (Science, Engineering, Math, Technology) site, such as the ScienceBuddy forum, which will hopefully clear things up. Best of Luck. Also, see my post above, if it's no trouble.

0
None
TechWhizz

Question 1 year ago

How does this lie detector actually detect lies? Meaning, how can it tell if you are telling a lie or not? Just wanted to get a doubt clarified. Your project is very interesting and creative.

0
None
Sefane

2 years ago

Where did you by the 47k variable resistor with numbered knob

2 replies
0
None
Sefane

2 years ago

what does vr stand for in this project in send him an email but he did not respond and i want to make this for my science fair

4 replies
1
None
amelia_44444

1 year ago

WHERE DO YOU GET ALL YOUR MATERIAL????????? PLEASE ANSWER!!!!!!!!!!!!!!!! :|

0
None
RenzRosario26

1 year ago

sir? can you post the detailed circuit? because i already choose it to be my functional demo model? reply ASAP sir

0
None
FarabeeK

1 year ago

can anyone please tell me how it will sense lies with skin resistance..as it would require a sensor and code to tell if the person is twlling the truth or lying