Is this a correct circuit?

Hi guys. Is this a correct circuit? I mean will it work properly? Does this circuit need resistors? The only thing that I'm afraid of is that how many modules I can solder in one 5V pin and one GND pin and in this scheme depicts properly? Don't judge me I'm just studying this stuff, thanks.
![Scrload://8mbLYfx4J5jXELTqQ

4 AAA batteries gives you 6v.

6v on electronics that requires 5v will damage that electronics.

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You take a graph paper and hand draw the circuit of your project. You may tell the names of the components of your project of Post-1. Someone will try to make a hand-drawn circuit for you.

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Okay, thanks. Is everything else okay?

Hi,

If you draw a circuit diagram and not a Fritzy picture, more people might look?
A hand drawn circuit with labelled components and pin names will be great.

Thanks.. Tom... :grinning: :+1: :coffee: :australia:

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Move the battery output power from the 5V pin of the arduino to the VIN pin and change
the battery pack to a 6-cell pack to get 9V and it will work. (the minimum VIN voltage is
7V, so the next highest pack voltage is 9V (6-cells).
You have not listed the names and links for the other devices so I can't tell what the voltage
input ratings are for them. If they are 5V devices then they cannot be connected directly to
the 9V supply and should be powered by the 5V arduino output , not the 9V battery. You
need to post the links for the devices you are using to obtain the load current ratings for
those devices, since you have not listed the names of the devices used and there are no
labels shown to identify them. You need to either list the correct names for the devices
or post links for them. Your Fritzing is basically useless to us.

Use the internal pullup resistor with the button input, then you will not need the resistor.

What is the device in the upper right of the diagram?

< edit >
What type display are you using? Are you sure it need 3.3V for Vcc? If so, are the inputs 5V tolerant?

When you post your schematic, a hand drawn circuit in jpg or png is far preferable over a pretty Fritzing picture. A schematic is way simpler and easy to understand than a physical layout. The schematic is a functional description describing the flow of operation. The symbols actually describe functions and are read as such, something Fritzing does not. Using Fritzing will reduce the pool of folks prepared to even look at your problem. Do not hurry drawing a schematic, it is a very valuable tool to help you and us understand your project.

(Text from a collection of recent posts about Fritzings).

Did you read the Nano documentation?

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Can you tell me please what's the difference and what's the right connection? I'll be appreciated it..

5V takes 5V. Vin expects at least 6.5V. You don't say what voltage you're using.

Steve

No, you're kidding me!

What voltage does the HC-SR04 require?

I'm using 4.5V from a battery pack

The image shows 4 cells. That would be approximately 6V.

Yeah, I know, sorry for that. There should be 4.5V

Have you read the documentation yet? Also please answer reply #6. Why should there be 4.5V?

Real or simulated?

No. I'm a newbie. If you know the answer why can't you say me? What's the difference or is there no difference? Thanks.

Real