Project for school

Projects General Guidance
1

Hi guys. I just joined the community and I saw alot of comments of people getting pretty upset of the fact that there are many mean people here that insult even rookies that are just trying to find help. Well that problem doesn't apply at all to me. Mean or not, I do not care the slightest about that as long as one kind soul on this platform is kind enough to help me. I am very bad at the hardware part for arduino and im ok-ish only on programming. I understood some things from online but its still not enough.

So I gotta do this project for school but its kinda hard.
Basically I have to do a robotic arm that is autonated by arduino only so I cannot control it.
For the arm itself I printed it 3d and it will have a total of 4 DOF. In total 5 motors 28BYJ-48 and 5 drivers ULN2003 (2 motors are for the first dof on the base).
Now the thing is I only have one arduino uno and chatgpt keeps saying to me that" yOU cANnoT pOWeR aLL mOToRs fRoM aRDuINo oNLy". I understand that but I dont get whats the other best way.
Should I get an power supply module for the breadboard or maybe it works with an adapter 12V 2A where I chop the cables a bit and connect them to the breadboard (but I protect it from the current with an LM2596)
These are all things I learned from internet and chatgpt btw.
Please tell me whats the best way either of this or something else. And if possible help me get through it will all the connections.

Please someone kind enough to help me get through this whatever the cost help me.

2

Welcome to the forum

Each motor will be connected to a ULN2003. Connect the motor power input of each ULN2003 to an external power supply capable of providing enough current for all 5 motors. You only need one power supply for all 5 motors

Each ULN2003 will be controlled by connections to pins on the Arduino. In addition to the control pin connections connect GND of the Arduino to GND of each ULN2003 to provide a common reference level for the Arduino control signals

Be careful when using a breadboard that its connections can handle the current required by the motors

3

My external power source is that ac adaptare with 12V and 2A. I have cut its jack port and cut a bit of the protection of the 2 wires leading to it just so I can noe use those wires to power all the breadboard. One for gnd and one for power. I also have a lm2596 module for limiting the tension to 5V not to let the engines and drivers burn. But I do not get exactly how do I connect those adapter wires with the module? I assumed I put them through the specific holes then back to the gnd and power for breadboard. Wrong. One of my drivers kinda made a "pock" sound and next thing I knew is it doesnt give enough power to the engine anymore so it can run and instead I just hear a continous beez sound. Thats when I knew either I ask for help or I will make every piece burn (probably).

For reference this is what I made up to now. Please do not laugh (too hard) of me.

file-Hy3gfKnGQWAsKynKtpmrEz
file-Hy3gfKnGQWAsKynKtpmrEz1152×1536 285 KB

file-5gzHkWUtfTF1gG7A5us7Wo
file-5gzHkWUtfTF1gG7A5us7Wo1152×1536 291 KB

4

Read the instructions that arrived with the breadboard, or search "how to use a solderless breadboard"

image
image1000×741 54.1 KB

5

This much I understood. Look at my photos. But beyond that... Im not sure why the driver burned anyway. I searched and found out maybe the lm2596 had too much volts so I gotta make it lower but I dont have a multimeter to see exactly when its at 5V :frowning:

6

You should make a drawing of your wiring and post it here.

7

So the photos do not help. Welp I gotta do it ig.

8

Photos do not work yet. First we need to know your wiring.

Photos will be used to assess some parts identification, and ensuring the wiring diagram is followed.

1 Like
9

I think for a project like this, you'll need (at a bare minimum) a basic multimeter.

It would be like a baker without a wisk...or Bob The Builder without a hammer...

10

Ok uh how can I draw something eligible in that sense on a phone? Im not at my pc rn. Its kinda late and tehnically I should sleep but here I am talking about arduino. :sweat_smile:If its not possible Im gonna come tomorroe with the drawings.

11

image
image158×171 39.3 KB

Are the wires soldered to the PCB or just inserted through the holes ?

12

Yh im gonna go tomorrow and buy one

13

Pencil and paper and a photo of the drawing. Make a box. Label the pin numbers. Draw PARALLEL lines indicating connections.

Here's something not overly fancy...

            ┌───────────┐
            │ESP32 WeMos│
            │  D1 Mini  │       ┌────────────┐
            │RST      TX│       │POWER SUPPLY│
            │A8       RX│  ┌────│GND         │
            │D0       D1│  │ ┌──│5V          │
  ┌─────CLK─┤D5(14)   D2│  │ │  └────────────┘
  │         │D6       D3│  │ │
  │ ┌──DATA─┤D7(13)   D4│  │ │
  │ │ ┌──CS─┤D8(15)    G├──┤ │
  │ │ │     │3V3      5V├──│─┤  ┌───────────┐
  │ │ │     │           │  │ │  │MAX7219 8x8│
  │ │ │     │RESET      │  │ └──│5V       5V│
  │ │ │     └───────────┘  └────│GND     GND│
  │ │ └─────────────────────────│CS     DOUT│
  │ └───────────────────────────│DIN      CS│
  └─────────────────────────────│CLK     CLK│
                                └───────────┘
1 Like
14

You sure have a personal way making contact.

Talking about chatgpt is like swear in church.... You ought to know that from reading posts.

Don't use breadboards for distributing power. Use screwblocks. Common reply here.

Ehhh. Is Your school work supposed to find other people to do it for You? Do more research on Your own, learning "how to" is likely the purpose of school. Reading datasheets is mandatory assuming that school has given You some basic electronics lessons before.

15

There are just going through. Chatgpt told me thats how I should put them😭

16

Throw that word out the window. Use your own reading and verifying what you read was accurate.

17

Sorry if you took offend thats what I saw for the first time. And I do not have screwblocks. And its kinda late to guy and buy one. And no your not supposed to do it for me but gues what im stuck and dont know what to do.

18

Inspired by reply #14? Joking!
"Destructables" can go the same way.....

19

I found out a bit late but yh he s useless at this thing.

20

You saw people not following the rules. When you walk into a place, you need to follow their rules. Not following the house rules makes for bad times.