Making Galvanic Skin Response Finger Electrodes

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Introduction: Making Galvanic Skin Response Finger Electrodes

About: Engineer, Author, and Amateur Scientist

Galvanic Skin Response or GSR is a physiological effect used in Biofeedback and Lie Detectors. I've developed an Android App that turns a smartphone into a GSR sensor. However, it requires making special finger electrodes to use. This video shows the process of making them from an Audio/Video cable and some Velcro. More information about Galvanic Skin Response and the program can be found on my website: http://www.extremenxt.com/gsr.htm .

Step 1: ​All of the Instructions Are in This YouTube Video.

The cable used in the video is a Philmore 42-3546.

1 Person Made This Project!

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14 Comments

0
temckinney
temckinney

Question 6 weeks ago on Step 1

Hi, I've been looking for finger GSR sensors that I can afford since the ones on the market I could find were outrageously expensive. Do you happen to know if these would work with Android applications that use these sensors through the 3.5mm jack? Thank you.

0
gasperi
gasperi

Answer 6 weeks ago

Hello. I really don't know how the other applications work. I would expect that they do something like producing a signal on the headphone output and listening for the signal on the microphone input like mine. However, they might do something to prevent bypassing the purchase of their sensors.

0
walkerunner0
walkerunner0

1 year ago on Step 1

My application appears not to be working, it is at a consistent 0.03 regardless of me touching the electrode. Do I need a resistor? If so, what type should I get and how should I apply it to my device?

0
gasperi
gasperi

Reply 1 year ago

I'm sorry you are having trouble. It is really hard for me to tell what is going wrong. Sadly, they have changed the Android operating system so much from when I wrote the app it could easily be that too.

0
AlenaL
AlenaL

4 years ago

The application doesn't reflect GSR in my case. It shows the level about 0.025 when nothing is attached to electrodes and 0.023 when they are attached to skin.

Who did make it?

0
gasperi
gasperi

Reply 4 years ago

You probably need the resistor as described in the link. Without it the program will not work.

0
EnaraA
EnaraA

5 years ago

The application is not working for me...:S

0
IslamY1
IslamY1

5 years ago

the ​code please to get the galvanic skin response value in the serial monitor

0
BakriA
BakriA

6 years ago on Introduction

gaspery hay , you can upload videos of advanced video and could you please tell me how to work after connecting the cable to the phone . I really like the tools that you create. Thank you

0
hip2diy
hip2diy

7 years ago on Introduction

hi

i did what you explain.. but i'm not understanding the app. can please explain a bit more about the ranging.

thanks

0
hip2diy
hip2diy

7 years ago

can't find the video

0
gasperi
gasperi

Reply 7 years ago on Introduction

The video is Step 1. Just click the triangle for it to play.

0
hip2diy
hip2diy

Reply 7 years ago on Introduction

Strangely, the application does not have the option to play

0
gasperi
gasperi

Reply 7 years ago

The app calibrates for about 15 seconds then starts recording. I'm not sure why you don't think it is working.