Open Source EMDR Machine #6. Updated breadboard layout and design changes

16 May 2021

Open Source EMDR Machine. The Whole Blog.

Design changes

After building a prototype I decided to make some design changes.

1) All vibration motors will be 3.3V motors. Surprisingly, they are more powerful than 12V ones.

2) I will not use DFPlayer, but will use Arduino tone() function to produce sound for the left and right speakers. It will let me have as long/short of a sound as I want.

Updated Breadboard

Here is an updated version with Arduino Nano, 12V supply is replaces with 3.3V supply and overall cleaned out. I found a couple of mistakes in my previous breadboard file, so I tried to fix them all.

Top Comments

DAB over 4 years ago +1

What convinced you that 3v motors were actually more powerful than 12v motors and which specific motors did you compare? DAB

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DAB over 4 years ago

What convinced you that 3v motors were actually more powerful than 12v motors and which specific motors did you compare?

DAB
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ilvyanyatka over 4 years ago in reply to DAB

I tried these motors:
3V - https://www.amazon.com/gp/product/B07KYLZC1S/
12V - https://www.amazon.com/gp/product/B07CG79469/
For this machine motors supposed to be held in hands and attached to the chest, so I just held both sets in my hands and checked how it feels.
3V felt more powerful. I was very surprised. Maybe it is because 12V are in the hard shell and the shell cancels some of the vibration.
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ilvyanyatka over 4 years ago in reply to DAB

I tried these motors:
3V - https://www.amazon.com/gp/product/B07KYLZC1S/
12V - https://www.amazon.com/gp/product/B07CG79469/
For this machine motors supposed to be held in hands and attached to the chest, so I just held both sets in my hands and checked how it feels.
3V felt more powerful. I was very surprised. Maybe it is because 12V are in the hard shell and the shell cancels some of the vibration.
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