Author Topic: SOR community project? (Read 20208 times)

SmAsH · « **on:** April 17, 2009, 09:01:39 AM »

hey guys this has been bugging me for a while and thought i would just ask, did that thing ever go ahead? this thing http://www.societyofrobots.com/robotforum/index.php?topic=2765.0 has anyone done anything towards it, and is it still going ahead or has it since died? it just seemed that everyone who was 'involved' in this project was really excited and had so many ideas that i think were excellent! is this idea dead?

superchiku · « **Reply #1 on:** April 17, 2009, 09:30:49 AM »

Asellith · « **Reply #2 on:** April 17, 2009, 12:17:52 PM »

If my health ever gets better I have plans for my own modular system based on the idea from that project. However I think that project is dead. Feel free to design a module to the specs. Maybe if we get a few modules tested and working we can revive it. The google docs for all that are still up.

SmAsH · « **Reply #3 on:** April 17, 2009, 04:32:07 PM »

well i will certainly look into doing that as this year im not going to be as busy as next so i will have some free time.
i will definitely look into doing either a motor driver module or a stepper motor driver module.
i just have two questions, what are the board sizes, i read somewhere in the thread 1.5X1.5"?
and what are the screw sizes? for the standoffs? i have a week and a half of nothing before i go back to school so i can start designing a motor driver module now.

Weird Fishes · « **Reply #4 on:** April 17, 2009, 06:23:09 PM »

I read over parts of the thread (IE: p1 and p8

) and it looks really cool! I'd love to help if it gets going again. I'm going to go read over the whole thread actually. I love these open source projects. I've been wanting to be a part of one for a while now. Best to do it before I go off to Uni next year I suppose... from what I hear the CE program there (University of Waterloo for any of you Canadians out there) is pretty intense.

SmAsH · « **Reply #5 on:** April 17, 2009, 07:08:33 PM »

im going to start designing it today, if i can get my eagle working. can anyone help me?
my eagle is loading up fine but when i click add component and that window pops up there are no components? this happens in the brd editor and sch editor? im wiping everything off my pc to do with eagle and going to try installing again soon.
edit: ok its fine now, turns out my computer added some files when i updated it that i deleted and now the libraries are showing up.

dellagd · « **Reply #6 on:** April 17, 2009, 07:44:22 PM »

I'm pretty good at C++ computer programming, so I could help with code.

SmAsH · « **Reply #7 on:** April 17, 2009, 08:09:02 PM »

just a question, do motor drivers need 2 inputs per motor?

galannthegreat · « **Reply #8 on:** April 17, 2009, 08:21:37 PM »

yes, one for high and one for low (back and forth alternating)

SmAsH · « **Reply #9 on:** April 17, 2009, 08:34:24 PM »

awesome, thanks.

galannthegreat · « **Reply #10 on:** April 17, 2009, 08:37:06 PM »

no problem, glad to be of help

Asellith · « **Reply #11 on:** April 17, 2009, 08:39:04 PM »

All the defined specs are here.

http://docs.google.com/Doc?id=ddp2r5j8_24hhf75vck&hl=en

Also that links to the other pages that where worked up. I think Dunk was the one who defined most of the specs.

SmAsH · « **Reply #12 on:** April 17, 2009, 09:03:59 PM »

thanks asellith, and yes dunk did come up with most of the specs.
edit: i have attached what i have so far. could you guys tell me anything else you think it may need in it? leds, caps, diodes? i know i need to put some caps in, i will do that later on. right now i need some lunch.

Ro-Bot-X · « **Reply #13 on:** April 18, 2009, 05:26:17 AM »

What is the schematic? The layout does not tell much...

SmAsH · « **Reply #14 on:** April 18, 2009, 05:27:59 AM »

updates for you guys to check out, less jumpers, less space and ver1.7 needs +5V from somewhere else as it doesn't have an on board regulator as dunk said the modules can get +5V from the main board.. i have attached versions 1.5, 1.6 and 1.7
@ro-bot-x i have attached a crappy schematic, i will make a better one soon.

dellagd · « **Reply #15 on:** April 18, 2009, 06:03:10 AM »

just a question SmAsH,
what Ideas exactly are we taking and using from here
http://www.societyofrobots.com/robotforum/index.php?topic=2765.0

SmAsH · « **Reply #16 on:** April 18, 2009, 06:09:58 AM »

i would say the idea to have a set of modules that are open source and easy to interface with, the standards that dunk put on his pages: http://docs.google.com/Doc?docid=ddgqp9wc_0gpbcwmgm&hl=en
and an open source community project
there are a few others which i cant think of right now.
1.8 attached

Webbot · « **Reply #17 on:** April 18, 2009, 11:22:57 AM »

It might be worth looking at my 2Amp DC Motor Controller in the Motor Controller member tutorials. This uses a L298 but has some extra components so that you can use two wires to control each motor with variable speed, fwd and backward, and brake. The design is very similar to the Solarbotics L298 motor controller. You may want to redo my board layout - it could be made much smaller - especially if you use a dbl sided pcb.

My C++ library in the member tutorials has software classes to control it and my 'imminent' C library has support for it as well.

Can'[t give direct links at the mo as the member tutorials section of SoR seems to be down.

SmAsH · « **Reply #18 on:** April 18, 2009, 03:46:47 PM »

well, i will take a look at that webbot. thanks for that

and the tuts are still down $:-\$
and a question towards eagle, does anyone know how to get a black background instead of white? i used to have it then i reinstalled eagle and i have a white one?

Asellith · « **Reply #19 on:** April 18, 2009, 06:31:31 PM »

Don't forget the heatsinks. Not sure if you need a big enough one to justify mount holes on the board but it something you need to think about in the early stages and you might have already done that but I just wanted to check.

SmAsH · « **Reply #20 on:** April 18, 2009, 06:36:14 PM »

lol i forgot about those! ive never really used em before but i will order some when i get the components for the boards. they are only needed if pushing the chip to its max right? like drawing close to 2 amps?
EDIT: heatsink added and new schematic added with the vs and vcc pins not mixed up

Ro-Bot-X · « **Reply #21 on:** April 18, 2009, 08:00:14 PM »

Smash, it will be helpfull to Export the schematic and board to image (from File menu) since not everyone wants to load them up in Eagle. Just to take a look and see what's going on, a picture is more than enough. When the project is finalised, you can attach the brd and sch files. Thanks!

SmAsH · « **Reply #22 on:** April 18, 2009, 08:04:21 PM »

sure thing ro-bot-x, will attach a few images now.

Ro-Bot-X · « **Reply #23 on:** April 18, 2009, 08:29:49 PM »

Ok, now I see what you're up to. I have a sugestion: try to have all inputs on one side of the board along with the regulated 5V input (use regular pin headers) and the outputs on the other side of the board along with motor power. Perhaps rotate the L298 chip 90 degrees? See what you can come up with!

SmAsH · « **Reply #24 on:** April 18, 2009, 09:55:18 PM »

awesome, thanks ro-bot-x! do you think i should have an on board regulator?
EDIT: i was at it all day today but i couldn't find a way to have all outputs on one side without having heaps of jumper cables everywhere, so i think ill keep with the current design although i did make it smaller horizontally by moving some stuff inwards.

dellagd · « **Reply #25 on:** April 19, 2009, 05:57:47 AM »

I think we should have a on-board regulator

SmAsH · « **Reply #26 on:** April 19, 2009, 06:04:18 AM »

Quote from: dellagd on April 19, 2009, 05:57:47 AM

I think we should have a on-board regulator

yes i do agree and it would be a sinch to add a regulator but i was just confued by this post by dunk on his page.

Quote from: Dunk

Standard power bus should be 5V DC.
Modules operating at less than 5V should have on-board voltage regulator and buffer circuitry to allow 5V I/O.
Modules accepting greater than 5V (eg. 12V) which contain regulators to supply 5V to circuitry on board should also be able to supply other boards with 5V power to a minimum of 200mA.
Modules accepting greater than 5V (eg. 12V) to power high voltage components (eg, DC motor drivers) do not need regulators for modules 5V circuitry. They may draw 5V from another module.

but why not, i may as well chuck in a regulator $:-\$

Webbot · « **Reply #27 on:** April 19, 2009, 01:10:09 PM »

Worth checking out Solarbotics board: http://www.solarbotics.com/products/k_cmd/
The Resources tab has schematics etc. Board layout may give you some ideas.

Ro-Bot-X · « **Reply #28 on:** April 19, 2009, 03:15:03 PM »

If you want to add a regulator, use the 7805L at 500mA or even less, that uses a regular transistor size capsule, it saves some space. Besides, if you power just the L298 with it, makes no sense to use a full amp regulator.

I see now that you want a single layer board, that will work out better with your present layout.

SmAsH · « **Reply #29 on:** April 19, 2009, 04:10:46 PM »

okee dokee, ill add a small regulator somewhere on the board.

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Author Topic: SOR community project? (Read 20208 times)

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