Search found 354 matches

by MarkR
Wed Jan 31, 2018 6:05 pm
Forum: Antweights
Topic: Team BLEEP build diary
Replies: 123
Views: 97443

Re: Another noob bot

Yes, it's fine.

The current must be rated at least as much as it requires, it won't start any fires if the PSU is higher rated. Nothing bad will happen.
by MarkR
Wed Jan 31, 2018 9:46 am
Forum: Antweights
Topic: A hello and a Fail log of my attempts
Replies: 3
Views: 1498

Re: A hello and a Fail log of my attempts

Perhaps you could try stripping less insulation, it leaves a lot of room for short circuits. Or alternatively, use solid core wire - although that is susceptible to fatigue. The Dasmikro doesn't have holes, it makes the connections mechanically weak; I wish they'd make the board 1mm bigger and put h...
by MarkR
Tue Jan 30, 2018 9:25 pm
Forum: Antweights
Topic: Noob bot: Unmitigated Disaster
Replies: 5
Views: 2065

Noob bot: Unmitigated Disaster

I've decided to call this Unmitigated Disaster, because it seems I've got everything almost all wrong already. Although it fits in the 4" cube and doesn't weigh much (yet) (most of the gubbins is missing yet), it's still wrong already. There is a serious balance problem, it's not going to be able to...
by MarkR
Tue Jan 23, 2018 8:38 pm
Forum: Autonomous and Intelligent Systems
Topic: AutoBot
Replies: 18
Views: 52405

Re: AutoBot

That is so cool. I'm looking at ways of incorporating a Pi Zero into an antweight fighting bot. My initial plan is to wire it up to the Dasmikro ESC, power it from the Dasmikro's regulator and output PWM signals to drive the main motors. Servos (e.g. weapon) can be driven directly from a Pi's GPIO (...
by MarkR
Mon Jan 22, 2018 2:51 pm
Forum: Antweights
Topic: Team Dudge build diaries.
Replies: 85
Views: 24158

Re: First time building diary: Third Law

Some of the speed controllers, (I don't know about Rory's) have a built-in regulator, known in RC-speak as a "BEC" or "Battery Eliminator Circuit" - because traditionally its role was to eliminate the need for a second (receiver / servo) battery on a RC car. Antweight robots usually use the regulato...
by MarkR
Mon Jan 22, 2018 10:19 am
Forum: Antweights
Topic: Team Dudge build diaries.
Replies: 85
Views: 24158

Re: First time building diary: Third Law

About LEDs - diodes have a "forward voltage", which is the amount of voltage they will drop (almost independent of current) - this is the opposite of a resistor which has a constant resistance. So if you wire several LEDs in series, calculate the forward voltage (1.8V seems typical for some red LEDs...
by MarkR
Wed Jan 17, 2018 12:08 pm
Forum: Antweights
Topic: Team Dudge build diaries.
Replies: 85
Views: 24158

Re: First time building diary: Third Law

I see that there are various motor mounting options; I like the idea of using a plastic (maybe 3d printed, or bent polycarb) mount, then making "wrap around" wheels which overlap the gearbox. I saw that technique on a youtube video, it looks like quite a neat idea to save length on the gear motor. C...
by MarkR
Mon Jan 15, 2018 10:04 pm
Forum: Antweights
Topic: Hello, and a modular arduino controlled bot.
Replies: 6
Views: 2348

Re: Hello, and a bot

That is cool, I'm currently designing (/building when parts arrive) a 3d printed antweight which uses Raspberry Pi Zero as a receiver (I'll use the common Dasmikro speed controller and have the Raspberry Pi spit out PWM - I've done that before). I'm hoping using the Pi could enable more "interesting...
by MarkR
Sat Jan 13, 2018 10:16 am
Forum: Antweights
Topic: GeorgeR's robots
Replies: 127
Views: 103294

Re: GeorgeR's robots

Does the Dasmikro have pin-through-hole or surface pads for the connections? I'm guessing looking at the pictures that it's surface pads, it's easy to mechanically stress them (e.g. pull on the soldered wire), then the track comes off the pcb. Is that what happened? I'm guessing appropriate applicat...
by MarkR
Thu Jan 11, 2018 8:24 am
Forum: Antweights
Topic: Some questions about building an Antweight
Replies: 20
Views: 5790

Re: Some questions about building an Antweight

For me, I'd either * Get some off the shelf tiny steel or aluminum right-angle brackets - but most are too large for antweights * Get an extruded alu right-angle piece and drill some holes in it OR * Strip-bend the polycarbonate. Perhaps the strongest and lightest way is to strip-bend the plastic. T...