My robot idea can you tell me if it will work?

Hi,

I want to make a remote car that will move forward, turn left, turn right, and brake. Moving forward and braking command will be on a push button Naturaly open( N-O) signal. And I will add two potentiometre, one to move the servos left or right and the other to control the speed of the engine.

Since I study in electromecanic I start my construction with my knowledge, but it is my first robot, so I guess I did not take the cheapest option since I know nothing about robotic.

So for this project, do I need two arduinos?
Do I need another power supply for the servos so another polulu 6v so arduino won’t feed the servos?
Did I forget something?
Should I take another batteries pack than 2x 9v?

You may see the 3x cars plan. ( its not otimal on phone to open those)

shéma mécanique.pdf (51.8 KB)
shéma télécommande.pdf (66.1 KB)
shéma électrique.pdf (74.8 KB)

thanks alot

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Hi @Charley007 ,

I guess you could use one Arduino?

Could you try to draw schematics in Paint for example or maybe use draw.io?

O thanks Igor,

I did not know that apps. I redid my schematics, I will post it as soon as possible.

There the new schematic I hope now it is better.

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OK. Which ESC are you using to control these BLDC motors?

I was thinking of this one

Its 30 A ESC its more than enought for the lines of 5v and like 2.5 A that will be given by the battery 6s Lipo ( if I can, because its way more expensive than 2.5, maybe 5A max)

If I ever give it a 3s Lipo (the maximum I can in the spec) so 11.1 V and its like 236 watts max so at 11.1v its 236/11.1v = 21.26 A. An 30A ESC its enough to control it. But a 3S Lipo battery doesnt have that much ampere than that. It is usually like 2.5 A.

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OK. Did you already order some of the equipment? Maybe you started with the wiring already?

Ya, I did have the engine, one of the arduino(uno rev3) somes wires, 2 fuses box, one of the 2 on/off swtich, I do have the servos, the wheels, the home made hydraulic system for the brake, 1 bread boad that I will use for my remote control. I did buy too the Ir module, but I think it would be way better with rf module so I need to redo the code in the plan for it to work. I did buy 2x pulleys. I have the potentiometers and the buttons. I do have also a plexi glass sheet that I will cut for all the frame.

But ya I still need like 230$ on robot shop for almost all ( reg volt, Bec, Esc, rf module, some wires to connect xt30, somes bearings, etc). Maybe 30$ for scotchty diodes and capacitors and some resistors that might not be on the plan now but it would be in the final plan. And the battery 6s lipo and charger so around another 120$

But I can’t really do the wires now since I do not have all the piece. I can’t feed my servos with my arduino ( well I could, but not recommended) like my BLDC cannot be feed with arduino).

But ya for now I did start my arduino code and I try to make the best plan possible that also took quite some time. The code now are not finish, it were almost done with the IR but I need to do it over for RF. I wish to start the test soon with probably the oscilloscope and the power supply at school, but I will need alot of pieces before.

Edit:

Because of the money I will need to spend on this project built as I do, its why I wish to know if its will work or not or if I forget something on it for the moment.