I am currently working on transporting my 32-Band Audio Spectrum Visualizer Analyzer that I made from this website: 32-Band Audio Spectrum Visualizer Analyzer | Arduino Project Hub to an ATmega328-pu. However, I ran into an issue of not having enough pins. After watching this video: https://www.youtube.com/watch?v=Sww1mek5rHU and making the basic circuit for the ATMEGA328-PU I realized that I need another ground pin and a 3.3v and 5v pin on the ATmega328-pu to wire up my project to the ATmega328-pu. What should I do?
The project uses a Nano, complete with 3v3, 5v and GND pins.
Post a schematic and picture of your PCB or breadboard.
Obviously, if you have multiple connections to the same pin you wire them together. Personally I use stripboard, but breadboard can also work. There are many other ways, for example common blocks.
To get 3.3V you will need to add a 3.3V voltage regulator to you project.
Why do not connect all grounds to the same GND pin?
There is no 3v3 pin on ATmega328-pu, you have to add voltage converter from 5v power supply. It is exactly how it done on Nano in the original project.
However both of the power pins are used after making the basic circuit in this video: https://youtu.be/Sww1mek5rHU?si=L1-_82nnHBdTUJLU
However ?
Is it a response to what statement of mine?
There are you saying I don't need to plug it in to any pin on the ATmega328? Just an external source?
To plug what? 3v3 pin?
You must not to plug 3v3 to atmega328, if you use 5v to power the MCU.
What is your electronic experience? It seems to me that you not have enough knowledge to this project.
Sorry, I am pretty new. Can I just put a resistor between the power to make 3.3v?
Yes, you can use a 5v to 3v3 voltage divider
1 Like
Is this right or wrong?
Your diagram looks incorrect. The main idea of original connection is adjust analog reference voltage, but on yours AREF pin doesn't connect
What an idea to transfer the project to a bare Atmega328 chip, why not to use a Nano as in original ?
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.