Home
914 PC Bots Forum  


<< Start < Prev 1 2 3 Next > End >>
surovich
User

Platinum Boarder
Posts: 88
graphgraph
Karma: 2  
Supercharger Powerpack - 2007/08/05 09:00 This thread discusses the Content article: Supercharger Powerpack

This is AWESOME!

Do you think you could make the diagram into a schematic? There are a to of places that will make the PCB's fairly cheap....

This has been a big sticking point for me going forward with the bot as well, I wanted more time from it

This is GREAT work - BEST mod EVER!
  | | The administrator has disabled public write access.
c6jones720
User

Platinum Boarder
Posts: 350
graphgraph
Karma: 3  
Re:Supercharger Powerpack - 2007/08/05 19:24 I have to be honest with you power has been a sticking point for me too!

I work with embedded systems on a daily basis and I know only too well what happens when the power supply to a computer cuts out because of a power cut or brown out. At work the bosses dont like us using hard disks in our designs because of file corruption and disk crashes caused by bad power. We ended up using Flash disks but under normal XP you will still get the same issues. One time I actually had to resort to designing a special UPS just for one type of computer to ensure that the flash disk would never corrupt!

Ive seen some amazing projects done by others on this forum, but I was not prepaired to drive my robot around until I had a way of guaranteeing that it would always have power available to it if it needed it. At the end of the day my idea of a robot is a device that is smart enough to do things for itself. I dont want to have top get off my ass and plug a charger into my robot, it should do it itself. The supercharger is now a permanent part of my robot and soon I will be able to monitor the exact state of the batteries on the robot computer.

If there really is interest in this device then I am quite happy to post full schematics and software details for you guys to see.
  | | The administrator has disabled public write access.
aldebaron
User

Platinum Boarder
Posts: 133
graphgraph
Karma: 0  
KUDOS !! Re:Supercharger Powerpack - 2007/08/08 18:56 c6jones720 wrote:
If there really is interest in this device then I am quite happy to post full schematics and software details for you guys to see.

Please do so !!! I believe very much in what you are doing and this is a major step closer to what I still believe to be the first 'holy grail' quest of robotics: a self docking / charging robot. The next step in that quest is, as we have all been discussing, the daunting task of navigation. Certainly, the ability to place multiple inexpensive Tesla style 'tea kettle' chargers in areas, makes completion of a first draft navigation project faster.

Though someone needs to remember to throw an occasional chair, cat, child in the path of the bot to remind it that 'change is the only constant' Hopefully, the Bot will by that time be able to say "Enough already, I get the point" having developed its powers of alpha/beta/theta learning. ah...to dream....

Post edited by: aldebaron, at: 2007/08/08 11:03
  | | The administrator has disabled public write access.
aibo_rescue
User

Platinum Boarder
Posts: 155
graphgraph
Karma: 2  
Re:Supercharger Powerpack - 2007/08/09 05:14 I am glad that this aspect of bot enhancements got real tracking. It makes a lot of sense and helps in many other areas ... now what about a dock and auto charging ... ;

A few ideas/variants/simplifications:

1. As written somewhere else, it would be nice to implement inductive instead of mechanical connection. Time will tell if that is possible/feasible.

2. I keep the bot corded and powered by the supplied adapter most of the time while doing development and driving it occasionally. In most instances the adapter provides enough juice to keep the batteries fully charged while they (the batteries) power the bot. I understand that this approach would only extend the battery operating time when robot is moving most of the time.

Regardless ... the simplification that might suffice for many applications would be to keep the existing electronics, hide the adapter inside the bot and connect its power cord directly to "kettle" port mounted on the outside. That would extend the operational timeframe significantly, and in many real life operations indefinitely.

3. Ahhh ... the docking. I was thinking of mounting the "kettle" port not on front or back but under the bot. The clearance is an issue but it could be overcome. With the port installed that way, the docking operation could be simplified.

Imagine a dock in form of a ramp slightly raised from floor, with side and and bumpers, and "kettle" prong mounted on the top surface of the dock AND sunk so it does not stick too much or at all. When robot approaches the dock by using some sort of visual clues, it positions itself to drive up the ramp. The side bumpers guide the bot into perfect X axis alignment while end bumper limits its Y axis distance. When bot touches or pushes the end bumper, the sunk spring loaded prong emerges from below and connects with bot's port installed under the carriage. If connection is not established, the bot wiggles a bit back and forth until the prong successfully makes the connection. Somehow the prong needs to be sunk before bots leaves the dock ... maybe the function to move the connector up and down should be part of the bot and not the dock.

A variant: the bot's headlights could be used to activate and deactivate the prong ... a sequence of flashes received by dock's light sensitive element could be interpreted as a command to execute a particular action.

That's it for now ...

Post edited by: aibo_rescue, at: 2007/08/08 21:27
Best ... Richard
  | | The administrator has disabled public write access.
surovich
User

Platinum Boarder
Posts: 88
graphgraph
Karma: 2  
Re:Supercharger Powerpack - 2007/08/09 23:22 Ive been researching other ideas to find the charger, I dont like the recognition idea since I feel my ERS-7 recognition is lacking, and I would prefer not to have pictures of shapes/etc all over my walls to help it find the charger.

How about some sort of voltage sensor or light finder? Whats in the Roomba Discovery or Robowmower 1000's? My Roomba finds the base 100% of thr time, Aibo maybe 40% (depends on lighting), and I only have an RL850 Robomower, so no base.

This could be something simple using a PicAxe and serial communications to bot - some kind of light tracking? Infrared tracking? Etc????
  | | The administrator has disabled public write access.
aibo_rescue
User

Platinum Boarder
Posts: 155
graphgraph
Karma: 2  
Re:Supercharger Powerpack - 2007/08/10 01:39 I suggested visual clue not pattern recognition ...

Light beacon is one of visual clues the bot could use. iCybie (for sure) and Roomba (I think) use IR beacons for clues where the dock is ... that's still a visual clue to a bot although from an invisible to humans part of the spectrum.

There is not much difference in methodology when robot follows white light or black line ... and a lot of "kiddie" bots can follow a black line or find a source of light. That should not be too difficult once the "active" dock is in place and additional light sensors are installed on the bot.

Post edited by: aibo_rescue, at: 2007/08/09 19:26
Best ... Richard
  | | The administrator has disabled public write access.
<< Start < Prev 1 2 3 Next > End >>