Group Actions
Engagement
  • Author Author: ilvyanyatka
  • Date Created: Date Created
  • Views 2006 views
  • Likes 5 likes
  • Comments 9 comments
Related
Recommended

Open Source EMDR Machine #10. Update on tappers functionality

ilvyanyatka

Open Source EMDR Machine. The Whole Blog.

 

This will be a quick update:

 

While working correctly initially, at some point tappers (vibration motors) stopped working as designed.

 

After frying two relay modules I think I found the two issues:

 

1) Due to the error in the code I was sending On/Off signals to relays too fast, once per 10ms and I think that fried them.

2) I was not running motors from pins themselves, I used relays because I thought that there will be not enough current to run four relays pins, in addition to 2 sound pins and 1 LED pin. It looks like even with relay module there was still not enough current to support all the pins.

 

Fix for issue #2: I don't really need four relays, I can use two because left and right motors of each group start and stop at the same time. So I updated the breadboard to show this change.

Here is the new breadboard layout, hopefully the final one:

image

 

As for the issue #1 - error in the code, I think I fixed it. It need to be tested and probably one more timer need to be added - just to deal with motors' functionality.

But because I will not be able to test my project for several days, I decided to disable tappers functionality all together in the GUI App for now.

 

I will definitely come back to this later to check if my code changes will fix the problem (or if they will fry one more relay module).

Parents Comment Children