## Battery Buggy B

Jim_R
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### Battery Buggy B

Discussion for Battery Buggy B.

Battery Buggy Wiki
[gallery]Battery Buggy[/gallery]

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The Best of 2009#Electric_Vehicle Wiki
The Best of 2009#Scrambler_B Wiki
[gallery]Electric Vehicle[/gallery]
[gallery]Scrambler[/gallery]
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SOninja
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### Re: Battery Buggy B

Hi everyone. After doing a lot of reading here, I've managed to confuse myself a bit...
I am planning on using the wingnut on a threaded axle to activate a microswitch and stop power.

This is my first time so I wanted to start out simple, using this circuit (but without the connector):

But instead of NO, P, and NC, my microswitch says NO, C, and NC.
I have also looked at this picture on DS's post on microswitches:

and the circuit diagram on this post: viewtopic.php?p=23179#p23179 (scroll down a little).

All this confuses me because in the first picture, you have P connecting to the motor, NC to the + side of the battery,
and then in the second picture, you have NC connected to the motor, and P to the battery,
and in the third diagram, you have NC connected to the - side of the battery, and C to the motor.
So what should I connect NC, C, and NO to? And is C the same as P (common and power)?

Thanks!
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Dark Sabre
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### Re: Battery Buggy B

I can see how our 3 different diagrams could result in some confusion...

fleet and gh's diagrams are really the same thing. They have an overall power switch, a normally closed circuit powering the motor, and a normally open eddy current brake. When the switch is hit, the motors two terminals are hooked together and you end up with an eddy current brake.

My beautiful diagram assumes that you are using some sort of supplementary braking system...like a motor that lifts the car off the ground or clamps the wheels or something. When the switch is hit, power is taken off of the driving motor and applied to a braking motor.

Yeah, Power and Common could be used interchangeably here.

The diagram you want to use just depends on what braking system you want to try. I'd probably start with the gh/fleet one. If that isn't sufficient for braking, look into a supplementary braking system.

gh
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### Re: Battery Buggy B

Another issue DS didn't clarify on is that current can go through a switch in either direction; if current were water and wires were pipes, a three-terminal switch would be a three-port valve that allows flow in both directions. It doesn't really matter whether the current is flowing from NC to C or C to NC.

Also, Battery Buggy may not allow a braking device to touch the floor, so you may want to look into that.

P.S. Nobody should actually look at DS's diagram; it's only available on the wiki so we can humiliate him.
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RosesAndPandas
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### Re: Battery Buggy B

This is my first time on a building event and my partner and I are a bit confused. We finished building the actual vehicle and connected all the wires with the battery pack too. However, when we turn on the switch the engine doesn't run. Any reasons why?
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robotman
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### Re: Battery Buggy B

well
A. you wired it wrong
E.All of the above

SOninja
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### Re: Battery Buggy B

Maybe it's the wiring.
How does everyone connect their wires?
Can you just twist them and wrap them in electric tape?
What if you didn't have electric tape? Could you use any other type of tape?
or do you have to use a soldering iron?
a crimping tool?
It would be nice to hear some methods that have worked well/ not worked out.
thanks
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robotman
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### Re: Battery Buggy B

well till i get it to do exactly what i want i wrap it around and electrical tape it than later i will solder it so that i dont have to worry about it falling off if you really want to get fancy i think that there are connectors that you can by than get crimped to each side and plunged it

Dark Sabre
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### Re: Battery Buggy B

RosesAndPandas wrote:This is my first time on a building event and my partner and I are a bit confused. We finished building the actual vehicle and connected all the wires with the battery pack too. However, when we turn on the switch the engine doesn't run. Any reasons why?

If you can't figure it out after what they suggested, take a picture(s) to show all the wiring and post it.

RosesAndPandas
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### Re: Battery Buggy B

robotman09 wrote:well till i get it to do exactly what i want i wrap it around and electrical tape it than later i will solder it so that i dont have to worry about it falling off if you really want to get fancy i think that there are connectors that you can by than get crimped to each side and plunged it

Do you really have to solder it and crimp it to get the current to go through?
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robotman
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### Re: Battery Buggy B

no if you just wrap it tightly around the terminals it should work fine

andrewwski
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### Re: Battery Buggy B

Don't just twist or wrap the wires. It works fine for temporary use, but it's probably going to slip apart on you at the most inopportune time.

If you're attaching to contacts on a component, either solder or get an appropriate sized crimp connector if possible. Some contacts are the correct size for crimp-on connectors, others are designed just to be soldered to.
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Cyrus_D
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### Re: Battery Buggy B

Just food for thought. I know that iron can conduct electricity and threaded rods are made out of that (right?) So what if you made a same breaking system as scrambler and have a gap in the threaded rod so when it spins over to the other side of the gap it hits the braking wall and the motor stops I'll make a diagram and post it.

robotman
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### Re: Battery Buggy B

i have a feeling that would be hard to get to work right because you would have to make sure rhe axle cannot move making it so that it wouldn't finish the circuit
i feel it would be easier to just have a limit switch that gets activated when your wing nut locks to stop the axle but if you can get this system to work right i would love to see a picture or video

Cyrus_D
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### Re: Battery Buggy B

Yeah It'll be difficult but once you got it down i think it will be great! As for a limit switch I was also thinking about that. But wouldn't it be easier to have to flat pieces of metal to complete the circuit. (maybe a using a spring to keep them together) and then the wing nut will separate them after a certain distance? (is is that what a limit switch is??) I'm so clueless sometimes