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Budget Bot v4 - Sub $100 Robot.
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marto
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Joined: 08 Jul 2004
Posts: 5459
Location: Brisbane, QLD


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Other idea I just had.... Instead of making mounts for the wheels I wonder whether it would be possible to just hack up a drill casing.

I know phillip has done this back in the day with his pivot mounted designs. What I was thinking was pull out all the internals. Cut off the bottom section for use as a battery clip. Split the top half in half and then screw the side without the screws down to a timber plate. Then place modded drill back inside it and screw back down the top.

Not the greatest mount or most compact mount in the world but would take 0 skill to make if it works.

Then you can use whatever clip mechanism is left behind for the battery connector (if it stays in one piece without the other bits. And even use the charger that came with the drills and don't modify the packs.

Safer for noobs (no shorting batteries) and also cheap and simple. Run a few wires to the above board and you could very well be close to driving.

Plan for the board would be you have a PCB only one version, PCB + ICs or PCB + wire and a little switch board.

Depending on what you want all should be relatively cheap.

Steve
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Steven Martin
Twisted Constructions
http://www.botbitz.com

Post Sat Nov 08, 2014 5:02 pm 
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marto
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Joined: 08 Jul 2004
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Location: Brisbane, QLD


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I can confirm that Tuggeranong, K-mart in Canberra has $22 drills.

Steve
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Steven Martin
Twisted Constructions
http://www.botbitz.com

Post Sun Nov 09, 2014 2:25 pm 
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marto
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Joined: 08 Jul 2004
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Location: Brisbane, QLD


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I can also confirm that bunnings in tuggeranong does not have Red wheels.

Is this a typical thing?

Steve
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Steven Martin
Twisted Constructions
http://www.botbitz.com

Post Sun Nov 09, 2014 2:26 pm 
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Philip
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Joined: 18 Jun 2004
Posts: 3842
Location: Queensland near Brisbane


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Don't you have cheap wheels through BottBitz now?
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Post Sun Nov 09, 2014 2:52 pm 
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marto
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Location: Brisbane, QLD


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Lets not talk about that.
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Steven Martin
Twisted Constructions
http://www.botbitz.com

Post Sun Nov 09, 2014 3:15 pm 
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marto
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Joined: 08 Jul 2004
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Location: Brisbane, QLD


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https://grabcad.com/library/cordless-drill--1

Found this mode which should let me start thinking about how I could use a casing to mount the drills.

Steve
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Steven Martin
Twisted Constructions
http://www.botbitz.com

Post Sun Nov 09, 2014 7:11 pm 
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marto
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Joined: 08 Jul 2004
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Location: Brisbane, QLD


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http://www.bunnings.com.au/plywood-cd-imported-1200x1198mm-12mm-non-struct_p0340157

Construction material. Damn you expensive bunnings.
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Steven Martin
Twisted Constructions
http://www.botbitz.com

Post Sun Nov 09, 2014 7:49 pm 
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marto
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Joined: 08 Jul 2004
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Location: Brisbane, QLD


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So just went to another bunnings while killing time waiting for real estate.

And red wheels are now $6 which is stupid. Got to be something better I just don't know what and remember red wheels only need a washer and they just screw on so any mounting would need to be included in price but there has to be something better out there.
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Steven Martin
Twisted Constructions
http://www.botbitz.com

Post Wed Nov 12, 2014 10:02 am 
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dyrodium
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Joined: 24 Aug 2004
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Location: Sydney


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The crappy white wheels of the same Dia are still much cheaper, but I don't think they're as easy to mount...
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Post Wed Nov 12, 2014 11:36 am 
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marto
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Location: Brisbane, QLD


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Yeh I saw those don't think its worth it. Suck it up and pay $6 for reds Sad

Steve
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Steven Martin
Twisted Constructions
http://www.botbitz.com

Post Wed Nov 12, 2014 7:33 pm 
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marto
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Joined: 08 Jul 2004
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Location: Brisbane, QLD


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I pulled apart a $22 k-mart drill. And it all works better than I expected.

I came up with a method to mount the drill, battery and maybe even a plywood wheel with no additional parts needed. So pretty happy.

Now need to think about how it would all fit into a shell as it would be fairly large and the idea would be to cut it out of plywood with a jigsaw maybe with some sort of slotted design so that it was pretty strong.

If you used relays and the $5 radio Tim found you might even be able to get a full running robot for < $100.

Steve
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Steven Martin
Twisted Constructions
http://www.botbitz.com

Post Sat Nov 15, 2014 9:08 pm 
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marto
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Joined: 08 Jul 2004
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Location: Brisbane, QLD


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Few updates. I went on a bit of a Ebay purchase spree for this project and I think I have everything I need to do it. And for < $100.

I bought one of these to be programmed to be the Wifi Rx.
http://www.ebay.com.au/itm/400814585304?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

Two of these
http://www.ebay.com.au/itm/200988738224?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

And some parts to do the 3.3V reg
http://www.ebay.com.au/itm/271718273025?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
http://www.ebay.com.au/itm/351177897571?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

Total cost like $25 which for a full Rx and Controller is more than acceptable. Now just need to wait for them to show up and when I get some spare time I will see how it goes.

Steve
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Steven Martin
Twisted Constructions
http://www.botbitz.com

Post Tue Jan 06, 2015 1:23 pm 
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dyrodium
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Joined: 24 Aug 2004
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Location: Sydney


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320A... lol.

Still, at that price the 2S limit is worth it to get something moving. Smile
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Post Tue Jan 06, 2015 2:13 pm 
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marto
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Joined: 08 Jul 2004
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Location: Brisbane, QLD


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Hopefully 12V will be ok but we will see.

Steve
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Steven Martin
Twisted Constructions
http://www.botbitz.com

Post Tue Jan 06, 2015 2:19 pm 
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marto
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Joined: 08 Jul 2004
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Location: Brisbane, QLD


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Just wondering if the extra $5 would be worth order a 320 ESC from a reputable source.

http://www.hobbyking.com/hobbyking/store/__32025__HobbyKing_X_Car_45A_Brushed_Car_ESC.html

Steve
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Steven Martin
Twisted Constructions
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Post Sun Jan 11, 2015 11:30 am 
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