Mini RC submarine ballast tank test 2

Same as test 1, except at 2s LiPo. That's 7.5v (measured) and 160mA (measured).
Much faster. Also I flipped the mount to elleviate a bit of binding and the outer most position.

Category:

Science & Technology

Tags:

• ballast-tank
• submarine
• rc
• mini
• threaded
• rod
• low
• power
• cdrom
• tray
• motor

[sfalcon94]

Once under water, how do you manage to keep your electronics dry?

[1kreature]

@sfalcon94 Simply have the back end of the syringe and the electronics in a dry part of the sub. Only the ballast chamber needs to be connected to the water outside. It can even be connected via a small piece of tubing.

[ToKoMiKo]

Awesome, I've always liked r/c and really interested in r/c subs. Except I don't want to pay more than $100 to build my own (I play with a $30 store bought sub now) This setup looks fantastic and probably didn't cost much at all. I was just curious what plans you had to protect this motor from water? Are you going to put this whole setup into a tube and run the pick-up line outside?

[1kreature]

@ToKoMiKo Yes, The motors would be dry. The design I want to use is with a stepper-type motor made directly onto the shaft. Then the motor will not stick out beyond the wall of the syringe and the sub can be made with a front and aft ballast tank by sliding one syringe in front and one in aft. Electronics and batterys would be in middle along with 3-axis accellerometer that will calculate angle so that the front and aft tanks can be individually adjusted.

[tgnjkl]

There can that is too rapid.

This way it is very much difficult to regulate the point of  neutral floating in order that the submarine remains "suspended" in the water.

[1kreature]

I think I'll be making a controller to adjust the speed and direction. PWM should allow me to run as fast or slow as I like. I plan on adding magnets inside the backend of the plunger so I can use hall sensors to detect the endstops. Might as well make a controller with hall inputs and it can police itself :)

[WATC44]

Plz make a detailed how to make vid and send it to me!!!!!!! I would like to make a mini Sub (Rc of course) for exploring a lake! If you could help me with the design that would be great!!! I also want to add a live feed camera inside so I can see the deep. How much would it all cost?

[3qUInOc]

i have a question everything looks so good now

my problem is that how are you gonna change the motor signal i mean when you want to turn your motor clockwise to counterclockwise ? so i know that when you change the wires + to - or - to + your motor signal changes right ? how do you do that ?!

[agouti6]

where did you get such a large syringe?

[tgnjkl]

Excellent solution.

Really is better that my system.

I not have speed controller, and my endstops are micro-switch.

[MSargeNZ]

Nice, Faster and simpler in operation than alot of ballast solutions seen here.