oh and is there other controllers that are usable that aren't as expensive

Just received the toy tank itself and did my initial assembly. I don't have the camera or transmitter yet as Banggood are out of stock. And I have a 130mah lipo. Which makes the tank top heavy.
After reducing the channels endpoints to about 60%, it's drivable. However it topples over from the centre of gravity being too high up.
Still need to order the tank drive ESC instead of the dual race ESCs due to the breaking system making it difficult to steer in the direction you want

Ah thats cool! I did forget to mention limiting the throttle end point helps gain control  (also what i meant by possible swapping to a lower rpm motor)

Do you have the lipo in the very bottom of the tank chassis? Mine seemed to fit perfectly in the bottom

It is now. I cut out the front of the chassis to allow sliding the battery in and out and redesigned the 3D printed shell to accommodate for a different FPV camera as I've yet to receive the one from Banggood.
https://twitter.com/NZSmartie/status/1150580660970459144

I also tilted the camera up, as the high FOV meant most of the image would of been the ground which isn't terribly useful

I just received the ESCs. and immediately I don't like their "brake" system. When you reverse the direction of the channel, the brake is applied. You have to return the PWM signal back to 50% (re-center the channel) for at least 1 second before you can reverse the direction. 

Apparently you can update the firmware on the ESC, as they're PIC12F617, but i haven't looked into it yet.

I think this ESC would be much more suited as it's designed for tank style drive systems
https://www.banggood.com/2S6A-Micro-Dual-Bi-Directional-Speed-Controller-for-Tank-Crawler-and-Boat-without-Brake-p-1032413.html

Yes you could be right! I have only tried the ones I linked however, another esc but without brake but much much smaller here; ( Again I haven't tried this )

https://www.banggood.com/Das87-1S3A-Micro-Dual-Bi-Directional-Tank-Mix-Speed-Controller-Without-Brake-RC-Car-Parts-p-1476015.html?rmmds=mywishlist&cur_warehouse=CN

Ah! i did notice they seemed a bit "laggy" when changing direction, However I thought it might just be due to the friction of the tracks coupled with motors which are probably too high of rpm and lack of torque!

It'd be cool to have a few of these roaming the yard, sending the video feed to a server in the house with object recognition. Notify you when it sees an animal or person on your property.

ah this is cool. im starting a large tank track robot project. but now i want to make a small one like this :)

I'd love to see both!

wow, like your tank!

By the way, I've got quick question. how could you see the video feed from FPV transmitter?

via Android phone or any other receiver?  quite wondering as I'm quite new to this area.

Thanks.

Thank you, sorry for the late reply! Any 5.8ghz fpv goggles will work, even super cheap ones like these https://www.banggood.com/Eachine-E013-VR006-VR-006-One-antenna-3-Inch-5_8G-40CH-Mini-FPV-Goggles-Build-in-3_7V-500mAh-Battery-p-1239625.html?rmmds=search&cur_warehouse=CN

I have added these to the components list. there are many many fpv options available on the market

Wow! It is wonderful.

Thanks!

Very nice, but I don't see the new RC TX in the list... am I missing something?

Ah my bad! I'm using a Flysky fs-i6 a cheap and common transmitter, I will add it to the list!

Cute!! 

This is so very cool! Something like this would come in handy for inspecting tiny places, like under a computer floor! 

Another configuration of such a device would be to have legs like a spider in order to crawl over things that wheels (or in the above project, tracks) could not get over? Of course something like that would most likely be a 'bit' bigger, with room for more servo's to separately control the legs.

Legs would probably be way more versatile but way out of my capabilities! I'd love to build something like that though! 

considering this super basic and just has tracks though its really surprising how well it handles and climbs over stuff!

Excellent, can we add a visual slam server so that the tank can locate itself ?

Nice project, very inspiring.

Haha that would be really cool! not much room left on this tiny thing though!

I wonder if you could implement the visual SLAM on a remote device. That way you wouldn't need any extra hardware on the tank, instead whatever device you send the FPV feed to could handle it.

Awesome, love the look of the 3D printed body.

Thanks!