Search found 154 matches

by MarkR
Fri Mar 22, 2019 9:34 pm
Forum: Antweights
Topic: T_Y's Build Log
Replies: 99
Views: 7157

Re: T_Y's Build Log

The capacitor would go between the power and ground, as close as possible to your microcontroller. The idea is, that if there are spikes in the main power supply caused by (e.g.) motors turning on and off, they are smoothed out by the capacitor. As wires have resistance (and inductance), you want th...
by MarkR
Tue Mar 19, 2019 11:41 pm
Forum: Events
Topic: Antweight World Series 58 - 29th June 2019
Replies: 23
Views: 1010

Re: Antweight World Series 58 - 29th June 2019

There is video... https://www.youtube.com/watch?v=CYe_PA5pmVA The arena has partial drop-offs on two sides, but not corners. Some parts have higher walls than others. This is a very good design in my opinion, it allows pushing out of the arena but does not make it too easy; it allows powerful flippe...
by MarkR
Tue Mar 12, 2019 11:05 am
Forum: Questions (and answers)
Topic: Power connectors identification / naming
Replies: 2
Views: 203

Power connectors identification / naming

Hi, Perhaps someone knows the names of these power connectors? Perhaps this message will be useful if we add some info here: 1. The discharge plug on many small 2S and 3S lipo batteries. This is a polarised, usually red, female (on the battery end) connector with a pitch of about 2.5mm (it fits 0.1"...
by MarkR
Thu Mar 07, 2019 5:59 pm
Forum: Events
Topic: Antweight open/AWS 2019
Replies: 9
Views: 412

Re: Antweight open/AWS 2019

Basingstoke would be really convenient for me. Yes :)
by MarkR
Thu Mar 07, 2019 12:05 pm
Forum: Antweights
Topic: Botbitz 10 amp ESCs for weapon
Replies: 10
Views: 266

Re: Botbitz 10 amp ESCs for weapon

Pneumatics looks a bit complex... Yes, pneumatics is super-difficult, and I have no idea where to get the parts, but, if you pull it off, it is AWESOME... I mean, look at last year's "Anticide", it was super amazing. It was worth it just for the triple-back-flips :) Last year's AWS55 arena was buil...
by MarkR
Tue Mar 05, 2019 8:06 pm
Forum: Antweights
Topic: Botbitz 10 amp ESCs for weapon
Replies: 10
Views: 266

Re: Botbitz 10 amp ESCs for weapon

The 100:1 was a standard aliexpress-or-similar N20 gear motor. I'd say it flips a lot better than a weak or cheap servo, but looking at some of the other Ants at the tournaments, some of the higher spec metal gear servos do flip very well too. I don't know enough about the different models of servos...
by MarkR
Tue Mar 05, 2019 2:06 pm
Forum: Antweights
Topic: Botbitz 10 amp ESCs for weapon
Replies: 10
Views: 266

Re: Botbitz 10 amp ESCs for weapon

I used a 100:1 gear motor for the flipper on Betsie. I over-volted it to 17 volts, it works pretty well. I guess you'd get a really good flip, either by over-volting the motor to 12v (e.g. run on 3S pack, or use a boost module like I did), or by using a "high power" gear motor. The standard gear mot...
by MarkR
Mon Mar 04, 2019 3:44 pm
Forum: Antweights
Topic: Back Again! Knighthood Build Concept
Replies: 2
Views: 178

Re: Back Again! Knighthood Build Concept

I tried a Dasmikro and I wasn't happy with it, it's a pain to solder and mechanically very weak. (Although on the positive side it is *very* small). I then managed to let the "magic smoke" out, possibly by a short circuit from a lifted track. Again - the problems with the Dasmikro are mechanical rat...
by MarkR
Sun Mar 03, 2019 9:08 am
Forum: Antweights
Topic: T_Y's Build Log
Replies: 99
Views: 7157

Re: T_Y's Build Log

Maybe try to reroute the power to the servo, add some more decoupling capacitors on the mcu power supply, if you have space/weight.

I think you can't go much wrong with a 10uF cap on the Arduino, which is probably much bigger than the built-in one
by MarkR
Tue Feb 26, 2019 6:37 pm
Forum: Antweights
Topic: Water Bots - Floaters
Replies: 8
Views: 406

Re: Water Bots - Floaters

Are liquid (water cannon) weapons allowed, given that it's in water anyway? Maximum battery voltage for Antweights is 24v according to the AWS rules. Max for all classes is 50v DC according to FRA. Even 50v is unlikely to cause any real harm to someone who gets their fingers wet and stuck across the...
by MarkR
Tue Feb 26, 2019 4:40 pm
Forum: Antweights
Topic: Team BLEEP build diary
Replies: 104
Views: 8820

Re: Team BLEEP build diary

Why not use the charge plug to power your robot, and tie (or cut) off the discharge connector? I don't know how much current the 2S packs charge plugs are rated for, but I guess it's probably enough to run an Antweight, especially if it's not a spinner. I certainly considered doing this, it would sa...
by MarkR
Tue Feb 26, 2019 9:18 am
Forum: Events
Topic: Antweight World Series 58 - 29th June 2019
Replies: 23
Views: 1010

Re: Antweight World Series 58 - 29th June 2019

Great - it was super last time.

For anyone who wants to come by train- bring your bicycle - there is a really nice cycle path from Rugby station to the venue, I cycled there last year and it was very nice indeed.

Looking forward to it.
by MarkR
Fri Feb 22, 2019 9:41 am
Forum: Events
Topic: AWS 57 (February 2019)
Replies: 47
Views: 3413

Re: AWS 57 (February 2019)

Well many of the fights will last less than 1 minute, the trick is to optimise the time between fights, not the fights themselves. Changing the maximum time makes little difference because hardly any bouts last that long anyway. The trick is, based on my limited experience, to give competitors a wel...
by MarkR
Sat Feb 16, 2019 8:17 pm
Forum: Antweights
Topic: AgoBros team - build diary
Replies: 5
Views: 289

Re: AgoBros team - build diary

That looks great, how've you done that? Welded aluminium?
by MarkR
Fri Feb 15, 2019 11:22 am
Forum: Questions (and answers)
Topic: Wiring N20 motor terminals
Replies: 3
Views: 261

Re: Wiring N20 motor terminals

Maybe we should design (as a community) a more compact version of the Pimoroni one. I quite like the concept, but the side-mounted 0.1" right angle header seems less-than ideal. Perhaps a small surfce mount connector which can go right on the back of the motor? Right-angle or straight? I'm thinking ...