Search found 246 matches

by MarkR
Mon Nov 11, 2019 11:38 am
Forum: Antweights
Topic: The smart ant's and flea's
Replies: 75
Views: 66061

Re: The smart ant's and flea's

As far as the microcontroller goes- yes, use whatever will work for you, low power is definitely not a requirement, even the non-low-power chips use only a few milliamps, it's nothing, a single medium-bright led probably will draw more current. Does it need a lot of external radio gubbins such as ca...
by MarkR
Mon Nov 11, 2019 9:47 am
Forum: Antweights
Topic: The smart ant's and flea's
Replies: 75
Views: 66061

Re: The smart ant's and flea's

Seems like a lot of electronics for the smart board v2, those STM dual core processors things are 48-pin 0.5mm QFN looks pretty tricky to hand-solder, although not impossible if you design the footprint for easier hand-soldering. Also, maybe the design of that board will be a little complicated, the...
by MarkR
Mon Nov 11, 2019 9:29 am
Forum: Antweights
Topic: T_Y's Build Log
Replies: 152
Views: 77861

Re: T_Y's Build Log

I am suitably impressed. Does it drive?

Did you code in mixing so you can have one stick to turn and one to do forward / back / sideways?
by MarkR
Mon Nov 04, 2019 7:06 pm
Forum: Antweights
Topic: Weapon motor issue
Replies: 9
Views: 393

Re: Weapon motor issue

Difficult to imagine what might be wrong, but here are some more ideas: * Perhaps the BEC / regulators are fighting each other? Just try to disconnect one +5v wire * Maybe the power leads to the brushless ESC are a bit "iffy" and have too much resistance / connected too tenuously to actually run the...
by MarkR
Mon Nov 04, 2019 5:58 pm
Forum: Events
Topic: AWS 60 - Headington, Oxford - 30th Nov 2019
Replies: 47
Views: 11380

Re: AWS 60 - Headington, Oxford - 30th Nov 2019

I am particularly pleased to see the return of

WedgeWedgeWedge
Anticide
Diotant

and any rubber ducks which are signed up!
by MarkR
Mon Nov 04, 2019 5:54 pm
Forum: Events
Topic: AWS 60 - Headington, Oxford - 30th Nov 2019
Replies: 47
Views: 11380

Re: AWS 60 - Headington, Oxford - 30th Nov 2019

Looking at the wonderful array of robots signed up, I'd like to suggest to the EO, that there should be an award for best robot name, perhaps done by popular vote?

Should be "best robot name" award, to quality the robots need to actually turn up and compete.
by MarkR
Sun Nov 03, 2019 10:52 pm
Forum: Antweights
Topic: Weapon motor issue
Replies: 9
Views: 393

Re: Weapon motor issue

It is very unclear exactly how it's wired. 1. Are you powering the rx from the brushed (drive) esc, or the brushless (weapon) ESC? You should only use one BEC, otherwise the BECs (i.e. regulators) are fighting each other, bad things might happen even if they are configured for the same voltage. It's...
by MarkR
Sun Nov 03, 2019 3:08 pm
Forum: Antweights
Topic: Weapon motor issue
Replies: 9
Views: 393

Re: Weapon motor issue

Can you check the PWM signals are getting to the esc? Try testing using an oscilloscope, or otherwise, connect an old servo or something to the same channel, to see if it moves. I'm also thinking that maybe the wiring can't handle the current and it's just instantly cutting out when it tries to spin...
by MarkR
Thu Oct 31, 2019 8:50 am
Forum: Antweights
Topic: T_Y's Build Log
Replies: 152
Views: 77861

Re: T_Y's Build Log

I'm not an expert on the Arduino's capabilities - there is probably a limit to how many / which pins can do *hardware* PWM, but software PWM (bit-twiddling) can be done on as many pins as you have cpu time. For those H-bridges, and most of the ones I've seen, there are two signals - essentially, for...
by MarkR
Tue Oct 29, 2019 8:17 am
Forum: Antweights
Topic: T_Y's Build Log
Replies: 152
Views: 77861

Re: T_Y's Build Log

I don't think it's necessary to use two arduino pro minis. You will need 2 GPIOs for each H-Bridge, i.e. 8 Then just need one pin to connect a S-BUS / i-bus receiver (use the Arduino's UART RX pin), which is 9 pins in total, which is less than the number of gpios on a single Arduino pro mini. I have...