Search found 109 matches

by MarkR
Tue Nov 20, 2018 2:19 pm
Forum: Antweights
Topic: Part: SX1308 boost converter module
Replies: 3
Views: 18

Re: Part: SX1308 boost converter module

I think, in principle, yes. The module might weigh more than another cell and it is less than 100% efficient (worse at lower input voltage) I don't have a scale which can accurately measure the weight of the module, but I guess it's somewhere around 4g, maybe. It really depends on whether the curren...
by MarkR
Tue Nov 20, 2018 12:33 pm
Forum: Antweights
Topic: Part: SX1308 boost converter module
Replies: 3
Views: 18

Re: Part: SX1308 boost converter module

Oh yes- I think the part the Chinese resellers say about "short circuit protection" is a massive lie. It does not; if you short-circuit it you're putting a short across the inductor and diode, which are passive parts and don't have any protection in.
by MarkR
Tue Nov 20, 2018 12:30 pm
Forum: Antweights
Topic: Part: SX1308 boost converter module
Replies: 3
Views: 18

Part: SX1308 boost converter module

Hi all, These are a new(ish) module from Aliexpress, Ebay and all the usual suspects. They are very cheap, you can search for pictures etc. It is a module which takes an input of 3-10 volts, say, and outputs more volts with a claimed 2A max current (this obviously depends on how much boosting is nee...
by MarkR
Fri Nov 09, 2018 8:36 am
Forum: Antweights
Topic: Team 1202 Build Diary
Replies: 109
Views: 14231

Re: Team 1202 Build Diary

Yes, run an axe off a N20, then it will be really impressive (even if not necessarily damaging).

I think Derek Dudge's Manticore used a N20 with a beating club containing a big nut, and it was amazing at AWS55.
by MarkR
Mon Nov 05, 2018 4:23 pm
Forum: Antweights
Topic: Binary robot question
Replies: 2
Views: 69

Re: Binary robot question

Sounds legit to me,

but if the base is disabled during a fight, if the turret can't do controlled movement across the arena by itself, then it's lost :)
by MarkR
Sat Nov 03, 2018 9:14 pm
Forum: Questions (and answers)
Topic: Switches.
Replies: 1
Views: 140

Re: Switches.

I don't think there are any switches which can't handle 3S, it's really the current you want to think about.
by MarkR
Wed Oct 31, 2018 3:49 pm
Forum: Antweights
Topic: GeorgeR's robots
Replies: 73
Views: 7492

Re: GeorgeR's robots

scottylad7: You connect the servo output to the input of a brushless ESC, also the power, and it will drive the three wires required for a brushless motor. Some of the ESCs are programmable and can have some parameters changed in the firmware through a suitable interface cable.
by MarkR
Tue Oct 23, 2018 10:39 am
Forum: Antweights
Topic: servo gears
Replies: 10
Views: 401

Re: servo gears

if it's one of the servos with the brass knurled type of output, can you 3d-print the hole slightly small, then (gently) heat the output shaft of the servo, push the PLA part on, then when it cools it should be welded? I have used this approach on small nuts welded into PLA parts. One problem would ...
by MarkR
Mon Oct 22, 2018 10:19 pm
Forum: Antweights
Topic: Antweight robot names and pictures
Replies: 6
Views: 447

Re: Antweight robot names and pictures

@Alexandorz,

That robot looks absolutely amazing. I love the countersunk machine screws, the matt black finish, the professional construction. Those rear fins look awesome. It's a winner for me before it even competes.
by MarkR
Mon Oct 22, 2018 10:17 pm
Forum: Antweights
Topic: Antweight robot names and pictures
Replies: 6
Views: 447

Re: Antweight robot names and pictures

Betsie was pretty slow at AWS55. I used some motors from China with whatever ratio, I think 100:1, which seemed too slow. Betsie was back at AWS56 with many updates, including much faster motors. Not only is she a lot faster, the arena was also smaller, this probably explains why I drove twice into ...
by MarkR
Sat Oct 20, 2018 8:23 pm
Forum: Events
Topic: AWS56 - 13th October, Bristol
Replies: 37
Views: 2185

Re: AWS56 - 13th October, Bristol

Hi, We formed team "Unnecessary complexity" with my robot Betsie and Vance's robot "This Way Up!". Our team managed to bring quite a group of spectators - I think we had five at one stage (although one is only 9 months old and it's not clear that she's that keen on little fighting robots). This Way ...
by MarkR
Fri Oct 12, 2018 8:23 am
Forum: Antweights
Topic: Mark's Antweight build
Replies: 50
Views: 3135

Re: Mark's Antweight build

Here is Betsie at AWS55 in June 2018:

Image

Here is Betsie today (12/10/2018) after some modifications. Same basic design, but should now be much more competitive. Ready for tomorrow (?)

Image
by MarkR
Tue Sep 18, 2018 8:35 am
Forum: Questions (and answers)
Topic: Is this partlist for a antweight good?
Replies: 3
Views: 120

Re: Is this partlist for a antweight good?

Yes, what Peter said.

But for me, the rx module which comes with that transmitter looks a bit big / heavy, at least for a UK antweight 150g.

It's not clear whether you're in the USA, but if you enter the USA antweight tournaments, they have a much bigger weight limit, so maybe it's ok.
by MarkR
Tue Sep 11, 2018 10:16 pm
Forum: Antweights
Topic: Best NanoTwo alternative?
Replies: 7
Views: 657

Re: Best NanoTwo alternative?

That second board says it can take 10A and it looks really meaty with discrete mosfets. Maybe not for an antweight, it seems massively over-rated.
by MarkR
Fri Aug 24, 2018 11:42 pm
Forum: Antweights
Topic: T_Y's Build Log
Replies: 89
Views: 4779

Re: T_Y's Build Log

Will you do 4wd with 2 motors or 4?

If you use 4 motors, it's much more difficult to make weight. It is of course, still possible, but there will be less room for other stuff (like armour).

I am having fun trying to design a 4wd 2x motor... dunno if it will ever make it off the drawing board.