Search found 209 matches

by MarkR
Sat Aug 17, 2019 10:15 pm
Forum: Questions (and answers)
Topic: Graphene Batteries
Replies: 2
Views: 22

Re: Graphene Batteries

I get the impression that Hobbyking / Turnigy would claim their batteries contained Mithril and Dilithium crystals if they thought people would believe it :) I'm sceptical that this actually makes any difference, I think they're just normal lipo really, with a layer of unobtanium to make them sound ...
by MarkR
Thu Aug 01, 2019 6:52 pm
Forum: Events
Topic: RoboShowdown
Replies: 9
Views: 829

Re: RoboShowdown

IF I can make it, I'll bring Betsie and Stacie.

Then we can have that Betsie vs Mantis whiteboard you suggested. I love Mantis, it's brilliant (although it was my poor driving / weird control system which let me down last time)
by MarkR
Thu Aug 01, 2019 12:18 pm
Forum: Antweights
Topic: ESC Sanity check
Replies: 11
Views: 241

Re: ESC Sanity check

It's very difficult to produce a compact layout which doesn't have wires leaving from several edges of the board. With power, signal and motors, there have to be quite a few things. e.g. Dasmikro has awfully tiny nasty pads which are terrible to solder to, but still on both ends. It's a really good ...
by MarkR
Thu Aug 01, 2019 10:18 am
Forum: Antweights
Topic: ESC Sanity check
Replies: 11
Views: 241

Re: ESC Sanity check

Very interesting... it is the RZ7886, the DIP8 version of my favourite rz7899

https://lcsc.com/product-detail/Motor-D ... 28852.html

They should be as tough as old boots, if the other rz chips are anything to go by.
by MarkR
Wed Jul 31, 2019 8:38 pm
Forum: Antweights
Topic: ESC Sanity check
Replies: 11
Views: 241

Re: ESC Sanity check

It does look a little bit on the large side for an antweight ESC, and 5A per channel is definitely excessive, my N20 motors stall at about 0.5A, so even with two stalled in parallel that's still only 1 amp. I also noticed, on closer inspection of the pictures on various sites, that these ESC have a ...
by MarkR
Wed Jul 31, 2019 3:29 pm
Forum: Antweights
Topic: ESC Sanity check
Replies: 11
Views: 241

Re: ESC Sanity check

Do you have a multimeter? If you connect the ESC to the power and nothing else, the red and black wires on the servo-type plug (3-pin dupont connector) should give +5V from the regulator (BEC). Assuming that's ok, then can you measure the resistance between the various wires (with power off) - the b...
by MarkR
Wed Jul 17, 2019 11:27 am
Forum: Questions (and answers)
Topic: Basic Flipper Hinge Question
Replies: 9
Views: 881

Re: Basic Flipper Hinge Question

For completeness - I avoided having a hinge completely and on Stacie, I just pivot the whole flipper arm on a pair of N20 motors with a coupler I made http://vectrex.org.uk/mark/flip_coupler.png http://vectrex.org.uk/mark/stacie1.jpg (Difficult to see as the part is matt black due to being made of P...
by MarkR
Sat Jul 06, 2019 10:30 pm
Forum: Events
Topic: Antweight World Series 58 - 29th June 2019
Replies: 84
Views: 7455

Re: Antweight World Series 58 - 29th June 2019

Chris,

Was AWS58, "The biggest robot combat event, ever?"

According to Antlog there were 121 robots. This has to be some kind of record.
by MarkR
Fri Jul 05, 2019 9:35 am
Forum: Antweights
Topic: The smart ant's and flea's
Replies: 70
Views: 15856

Re: The smart ant's and flea's

Unorthodox was amazing at AWS58, please, tell us how the walking mechanism works?

Or is it a super trade secret?
by MarkR
Mon Jul 01, 2019 10:21 am
Forum: Events
Topic: Coping with the demand (An EO's perspective)
Replies: 24
Views: 1355

Re: Coping with the demand (An EO's perspective)

I would certainly not be in favour of anything which discourages teams bringing joke robots, last-minute robots, or other kludgy things which are unlikely to win - they are certainly part of the entertainment. I didn't see any ducks on Saturday, but at least Diotant was there (when did Diotant stop ...
by MarkR
Mon Jul 01, 2019 9:55 am
Forum: Antweights
Topic: ESCs and channel mixing
Replies: 7
Views: 498

Re: ESCs and channel mixing

If the ESC doesn't have mixing built-in (if they are only one channel each, then they don't, there is nothing to mix) then either the transmitter or receiver will need to do mixing. I think that some of the fancier TXs can be programmed to do tank-mixing, but I don't have such a transmitter. I've pr...
by MarkR
Sun Jun 30, 2019 7:24 pm
Forum: Antweights
Topic: Peter Wallers Robot Ramblings
Replies: 744
Views: 106957

Re: Peter Wallers Robot Ramblings

Good stuff Peter, so we rate the rz7899 as "combat ready" ?

I also ran Stacie with the rz7899-based Malenki-ESC, and it ran nicely, it did a lot more heavy duty work in the kids' arena :) , and was still working at the end.
by MarkR
Sun Jun 30, 2019 7:10 pm
Forum: Events
Topic: Antweight World Series 58 - 29th June 2019
Replies: 84
Views: 7455

Re: Antweight World Series 58 - 29th June 2019

Massive thanks to Chris and all, it was amazing. It was my first event bringing my daughter. I think she enjoyed it and I let her drive my new robot in the tournament. Good to see so many creative robots, opponents of note: * Mantis - it is even more impressive in the flesh than the videos I've seen...
by MarkR
Sat Jun 29, 2019 8:58 pm
Forum: Antweights
Topic: Esc and Receiver
Replies: 13
Views: 1051

Re: Esc and Receiver

I used these from Hobbytronics:

http://www.hobbytronics.co.uk/slide-swi ... ord=switch

They're only rated 0.5A, so I'm probably exceeding that by quite a bit, but only while the robot is actually active not while switching, so it's ok I suppose.
by MarkR
Tue Jun 25, 2019 11:19 am
Forum: Events
Topic: Antweight World Series 58 - 29th June 2019
Replies: 84
Views: 7455

Re: Antweight World Series 58 - 29th June 2019

My robot Betsie has a Raspberry Pi in it, and requires ~ 2 minutes to boot-up before a fight :) I will try to pay special attention to the now & next screens. They partially worked at last year's event and were very useful. I almost forfeited a fight at Ant Freeze due to Betsie not being ready. (On ...