Reason and understanding are the arms of our souls

Using Haptics for Directional Hearing part 4: Analog to Digital

After much confusion and fighting with the Analog circuit I had proposed before I, after discussion with a colleague, decided to move to a digital representation. So, now, my goal is to use an Arduino to do the circuit control. I’m currently working on a test script and fritzing diagrams to make this work better. I’ll have updates within the next couple of days, and we will see how things are going.

Hopefully, we will have a working prototype.

Using Haptics for Directional Hearing Part 3 – Testing and Setbacks

Sometimes when we have a design that works really well in theory, and then we test it in simulation and it works really well, we decide to take the next step and make one in practice. That is when things tend to go terribly wrong.

I got all of the parts for the Binaural Hearing Assistance Device (B-HAD) today. I was very excited and, after a quick run to the grocery store, set to work on testing the circuit on a bread board. Well, it did not go as planned. After connecting all of the pieces, and finally connecting it to power, I was happy to see the motor buzzing intermittently.

I soon learned it was intermittent because it was shaking its own connection to the breadboard loose…

So after securing that, and it buzzed constantly. I felt like that could not be right, so I started troubleshooting.

I removed the microphone. Still buzzing…

Removed everything but the power leads to the op-amp. Still buzzing…

I do not exactly know what happened, but I feel like that is not what should have gone down. I have sent an email to a gentleman I know much smarter than I in these matters and I am hoping for some feedback to make some real progress. Please, if you have any ideas on what is going on with this circuit, let me know in the comments below.

I will let you all know how that turns out.