Search found 177 matches

by MarkR
Mon Apr 15, 2019 8:00 am
Forum: Questions (and answers)
Topic: Small ESCs outside the UK
Replies: 13
Views: 264

Re: Small ESCs outside the UK

George- I will try enabling braking to see what happens. I didn't realise that braking was a useful feature, I didn't use braking on my previous robot (Betsie, which has a sort of fly-by-wire system anyway) and I've not implemented braking yet in the new speed controller (but the hardware is capable)
by MarkR
Mon Apr 15, 2019 7:53 am
Forum: Antweights
Topic: Pre modded servo boards for escs?
Replies: 18
Views: 574

Re: Pre modded servo boards for escs?

Sounds more like a poor design or poor choices of parts, than a manufacturing defect. A voltage drop of 2V at the kind of current we'd see through a N20 is extremely high, did you have access to an oscilloscope? Maybe the duty cycle is less than 100% even when the stick is at the extreme position? -...
by MarkR
Mon Apr 15, 2019 7:48 am
Forum: Antweights
Topic: Malenki-ESC open source Antweight ESC
Replies: 17
Views: 549

Re: Malenki-ESC open source Antweight ESC

Sounds like there is enough interest for me to knock up a batch. I'll let you know when they're ready and we can sort out the details (it will not be really soon, I need to order more parts, the boards are in the post).

There are also a few more tweaks to the firmware that I'd like to do.
by MarkR
Sat Apr 13, 2019 10:40 pm
Forum: Antweights
Topic: Malenki-ESC open source Antweight ESC
Replies: 17
Views: 549

Re: Malenki-ESC open source Antweight ESC

Do you have a link to the datasheet?
by MarkR
Sat Apr 13, 2019 10:14 pm
Forum: Antweights
Topic: Malenki-ESC open source Antweight ESC
Replies: 17
Views: 549

Re: Malenki-ESC open source Antweight ESC

Hi, It seems the Malenki-ESC is now working a lot better. * It does bot :) - I've built part of my next bot and it's driving just fine with 2 N20s. * I solved the voltage regulation problem which caused 2 mcus to be destroyed If I make a *small* number of these boards, does anyone want to test one? ...
by MarkR
Wed Apr 10, 2019 1:54 pm
Forum: Antweights
Topic: DVD-RW motor?
Replies: 1
Views: 67

Re: DVD-RW motor?

It is probably a brushless motor. I'm fairly sure that the 4th wire is a centre-point wire in the Y configuration of the brushless. It could be difficult to identify the wires. I suggest something like this: * Measure the resistance between each pair of wires * The one with the lower resistance to t...
by MarkR
Tue Apr 09, 2019 4:21 pm
Forum: Antweights
Topic: A Hotel, constructed of Limas, for Ants: A Build Diary
Replies: 76
Views: 2236

Re: A Hotel, constructed of Limas, for Ants: A Build Diary

I wasn't suggesting removing the protective film from the pack, just the warning label on the lead :) I did peel the labels off one of my packs because I was trying to fit it into a very slim space (actually rather stupidly, I bought larger packs than necessary, 300mAh). But not the film or anything...
by MarkR
Tue Apr 09, 2019 3:00 pm
Forum: Antweights
Topic: A Hotel, constructed of Limas, for Ants: A Build Diary
Replies: 76
Views: 2236

Re: A Hotel, constructed of Limas, for Ants: A Build Diary

Looks great, perhaps remove the "read warning before use" label from the lipo :)

Mark
by MarkR
Mon Apr 08, 2019 8:32 pm
Forum: Antweights
Topic: GeorgeR's robots
Replies: 107
Views: 11511

Re: GeorgeR's robots

Hi,

How have you made that linkage to connect the axe to the two N20 shafts?

Is it some kind of shaft coupler, flange plate thingy? Did you machine it yourself? It looks good anyway.
by MarkR
Sat Apr 06, 2019 11:24 am
Forum: Antweights
Topic: Team Pushover's Ants Build Log.
Replies: 37
Views: 569

Re: Team Pushover's Ants Build Log.

on the end of the spikes, is it a silicone / rubbery material for better grabability?

Looks fearsome though. I love the paintjob.
by MarkR
Fri Apr 05, 2019 5:03 pm
Forum: Antweights
Topic: Malenki-ESC open source Antweight ESC
Replies: 17
Views: 549

Re: Malenki-ESC open source Antweight ESC

There are three wires to connect. Two for power, and the third carries signals for all channels. Typically there's a dupont connector with three pins, gnd, power, signal. This is mechanically same as a servo, except it is electrically different. The ESC provides power to the RX (just like the Dasmik...
by MarkR
Fri Apr 05, 2019 9:06 am
Forum: Antweights
Topic: Malenki-ESC open source Antweight ESC
Replies: 17
Views: 549

Re: Malenki-ESC open source Antweight ESC

Yes, there is only one signal wire. Drones commonly use this, the signal wire speaks one of several commonly used protocols, either CPPM (which is several PWM signals multiplexed in time) or one of the serial bus protocols S-Bus or i-bus. It allows more channels with fewer wires. I can incorporate m...
by MarkR
Mon Apr 01, 2019 9:26 pm
Forum: Antweights
Topic: Pink servo??
Replies: 19
Views: 600

Re: Pink servo??

Yes, definitely don't power a servo through the 5v from the Dasmikro's regulator. I would make up a "Y" cable, with a battery connector on one end, to drive the Dasmikro on one leg and the servo on the other leg. Then you can connect the single wire for the servo pulses to the correct channel on the...
by MarkR
Mon Apr 01, 2019 9:02 pm
Forum: Antweights
Topic: Pink servo??
Replies: 19
Views: 600

Re: Pink servo??

I assume you use the Dasmikro to drive brushed motors, not the servo. If the Dasmikro cuts out, it's possibly due to voltage drop during the high current of the flip. I don't really think this is Dasmikro's fault (I have not had great success with Dasmikro but I am defending it on this occasion). Th...
by MarkR
Mon Apr 01, 2019 4:08 pm
Forum: Antweights
Topic: Malenki-ESC open source Antweight ESC
Replies: 17
Views: 549

Re: Malenki-ESC open source Antweight ESC

Another update: * Firmware is mostly working, it reads PPM, ibus or S-Bus and will autodetect (there is only one rx pin) I intend to build a robot with it shortly to see if it will actually bot :) Here is a size comparison, left to right: £1, DasMikro2S6A (2-channel), Malenki-ESC (3-channel), €1 htt...