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  • Author Author: ilvyanyatka
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Open Source EMDR Machine #4. Breadboard layout and Schematics

ilvyanyatka

Open Source EMDR Machine. The Whole Blog.

 

So there is some bad news. I started working with my Arduino Nano 33 IoT board and tried to implement the Bluetooth communication part first. And I successfully burned (fried?) my board. Not sure why exactly but it died when I was uploading/running for the first time my sketch with Bluetooth code. Previous simple version with just lights and without Bluetooth communication was working fine.

 

While I am waiting for a new one, I will continue working on my old Arduino UNO, postponing Bluetooth implementation and just connecting all hardware parts and making sure they work. I also have to supplement DFPlayer for Piezo disks. I will see how it works out and most likely get back to using the DFPlayer module after I get my new Arduino Nano 33 IoT board.



Here are the images of my Fritzing breadboard layout and Schematics. For some reason I cannot attach the full Fritzing file to this post. When I make this project public on GitHub I will add a link to the Fritzing file itself. Both use Arduino UNO as it is preliminary design, when I am done testing it, I will make a new layout and schematic using Arduino Nano 33 IoT.

 

 

Breadboard layout:

 

image

 

 

 

 

Schematic:

 

image

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  • Hi Enrique,

     

    Wow, I didn't know that! I thought limitations are the same as other Arduinos have. Where can I read about it more?

     

    I was testing my LED functionality, powering it from 3.3V pin and everything was working fine. I assume it was totally save based on (other Arduinos) specs - 200 mA max for 3.3V pin and the fact that I have only 1 LED on at any given time.

    Then I added code for Bluetooth, using ArduinoBLE library. On the first upload ,or maybe the first run after upload, (I got distracted so I missed the exact time) my Arduino Nano hangs. One LED stays On all the time and not moving. When disconnecting/connection Nano again I get the same result.  I tried to reupload the code both though ArduinoIDE and Eclipse but no success - IDEs hang for good 5-10 minutes with the message "Uploading", and then return me generic error "Error happened when uploading".

     

    So I assumed my Bluetooth code burned the board somehow. I think more correct English word will be "fried".  I am clueless how exactly though.

     

    Now, after your comment, I have a question: I was planning to power my Nano from old computer PSU unit, putting 5V on Vin. Is it safe? If not - is it safe to power it with 3,3V on Vin? What about Powerbank (I assume any USB cable connected to it will give me 5V)? I really don't want to power it from a computer.

     

    Thank you!

  • in reply to ilvyanyatka

    Hi, Victoria,

     

    Press the reset button on the board twice before loading the new binary. The two LEDs on the board will illuminate, indicating that it is in boot load mode. It will change the serial connection port of the board but the IDE will be able to find it. Try to upload the binary again as usual with the upload button.

     

    You have more information in the official start guide:

         https://www.arduino.cc/en/Guide/NANO33IoT

    and in the unofficial guide

         https://github.com/ostaquet/Arduino-Nano-33-IoT-Ultimate-Guide

     

    Lastly, you can power the board with 5V by Vin port without problem, it supports up to 21v.

    I am using 9v and 12v batteries through the Vin port with no problems.

    VenTTracker #06 -  Window Sensor Prototype

     

    Vin: This pin can be used to power the board with a DC voltage source. If the power is fed through this pin, the USB power source is disconnected. This pin is an INPUT. Respect the voltage limits to assure the proper functionality of the board. The MPM3610 Step Down Converter specifications indicate an input range between 4.5V and 21V, so you're safe with 5V DC

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  • in reply to ilvyanyatka

    Hi, Victoria,

     

    Press the reset button on the board twice before loading the new binary. The two LEDs on the board will illuminate, indicating that it is in boot load mode. It will change the serial connection port of the board but the IDE will be able to find it. Try to upload the binary again as usual with the upload button.

     

    You have more information in the official start guide:

         https://www.arduino.cc/en/Guide/NANO33IoT

    and in the unofficial guide

         https://github.com/ostaquet/Arduino-Nano-33-IoT-Ultimate-Guide

     

    Lastly, you can power the board with 5V by Vin port without problem, it supports up to 21v.

    I am using 9v and 12v batteries through the Vin port with no problems.

    VenTTracker #06 -  Window Sensor Prototype

     

    Vin: This pin can be used to power the board with a DC voltage source. If the power is fed through this pin, the USB power source is disconnected. This pin is an INPUT. Respect the voltage limits to assure the proper functionality of the board. The MPM3610 Step Down Converter specifications indicate an input range between 4.5V and 21V, so you're safe with 5V DC

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