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Printed Circuit Board for all of the ESCs and more

(Jay Abraham) #1

Hi Blue Robotics

i want to make a PCB that houses all of the electronics but i don’t know which PCB i should use that can handle the voltage and amperage coming from the ESCs. my ideal goal is to have all of the power lines and the signal lines integrated on the board and that has to hold 6 ESCs, 1 Pixhawk, 1 Raspberry Pi, 1 Fathom X, and that’s pretty much it. i need to know the specifications for the PCB that can handle the voltage and amperage without frying up and burning the board. Thank you SO MUCH for all you help

sincerely,

jay

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(Jacob) #2

Sounds like a cool idea! The electrical requirements for the motors can be found in the specification on the product page.

Let us know how it goes!

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(Jay Abraham) #3

i checked it out and i was wondering what kind of PCB did you guys use for the ESCs. would i be able to use that type of PCB to make the custom electronics board. how would the specifications change when you add more ESCs. i assume with the increasing current, the board will have to change. i very new to this btw. thanks for all the help

jay

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(Etienne Demers) #4

Very interesting project Jay.

If you made the PCB to replace the existing plate and save a whole lot of wires that would be awesome.

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(Jay Abraham) #5

Thanks!

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(Etienne Demers) #6

I’ve been working on a solution to allow more inside the 4inch enclosure and get rid of the rats nest of wires.

This is where I am at so far.

Basically the same PCB on top and bottom. Allowing to trap wires in between.

BR2 ESCs surface mounted.

The two main lugs is where the 12V / 0V will be mounted with an aux terminal bar for additional 12V connections.

Still a work in progress…

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(Jay Abraham) #7

you have no idea how excited i am. this is SUPER COOL!!! :laughing::laughing::laughing:

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(Nicholas) #8

This is a very cool idea! How are things progressing? Would you be interested in any help?

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(Etienne Demers) #9

Hi Nicholas,

What kind of help?

I am presently completing the PCB layout and then I’ll print some prototypes.

I hope to get it by the end of the month.

At present I am struggling with everything I want to put on the board VS the space I can use. I wishes I could plug the pixhawk straight in but its not possible at present.

I have changed this last design to have one current sensor per ESC and additional sensor for other peripherals.

I also have signal conditioning to sum all those up and an isolated op amp for voltage measurements so it can still go in the pixhawk.

Once I have tested this in depth.

I’ll be selling this board naked or populated for all the DIY people out there.

I have also designed a piggy back relay board and a piggy back arduino board with fans that will mount on this main PCB.

Coming later will be small opto-coupler boards to isolate the PWMs but I will need a lot of tests to make sure this will perform. I might have to modify the pixhawk a bit.

The Arduino board has a traco power isolated DC-DC 12VDC 60W module for all the peripherals.

This is all in complement to my subsea power mod so I can measure voltage, currents, temperature etc.

I’ll keep everyone posted…

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(Nicholas) #10

I dunno, I’m pretty good with electronics design, analog, digital high speed, power electronics. If you are having trouble fitting stuff I am a darn good layout artist, mostly work in Altium. I could also help make parts or test it or review or something.

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(Etienne Demers) #11

Hello Nicholas,

I added a new forum to my website. It might be more appropriate to discuss this over there: https://forum.deltarov.com/t/main-pcb-for-bluerobotics-4inch-housing/26

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(Etienne Demers) #12

Here is my final design for the first revision:

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(Jay Abraham) #13

this is super cool!!! did you use autodesk EAGLE to make the PCB?

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(Etienne Demers) #14

yes eagle CAD.

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(Etienne Demers) #15

its designed with expansion in mind. Relay board on one side arduino controller on the other…

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(Jay Abraham) #16

i see that you added a lot of holes on the PCB. did you do that because you wanted to completely eliminate the wiring in the ROV. i you planning on attaching the servo rail of the pixhawk directly to the PCB?

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(Etienne Demers) #17

I use 2 boards back to back. Some of these holes are for communicating to the other board so because I have the boards back to back I needed to duplicate the signals from one side to the other.

With regards to having the pixhawk connected directly tis will be done via another board that will fit over the RaspPi.

Trying to eliminate as much wires as possible is only one of the goals on this board.

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