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Hey I have an arduino Mega and I recently made a buggy using picaxe at uni. I want to know a list of things I would need to make a buggy. For example, which motors? and would I need a motor driver board... Im new to all this and would appreciate some comments and guidance.

Once Im sure I have all the right stuff i think I can learn the code from tutorials and stuff. and i can put it togther fine

Thanks in advance
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I don't think you connected the grounds, Dave.
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You could make a simple buggy with a couple of continuous-rotation "servo"s, some wheels and a pack of four AAs or AAAs.
It may not be necessary to use a motor shield.
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Whats the difference between a continuous-rotation servo and a motor?
and so will I only need 4 AAs to power the sensors such as IR, LEDs and servos/motors?
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I don't think you connected the grounds, Dave.
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Whats the difference between a continuous-rotation servo and a motor?
A continuous rotation "servo" used to be a real servo, so instead of needing a bi-directional driver like an ordinary DC motor would need, it has a simple three-wire interface - power, ground and speed/direction.
It also has gears.
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and so will I only need 4 AAs to power the sensors such as IR, LEDs and servos/motors?
That depends on how many there are, and how long you want them to run for.
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What do I need to make a arduino buggy
Most any code posted on the forum this week would do.
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Ok. Im from uk, so I wanted to find servos from uk, so that I dont have to pay loads for shipping, and found this:

http://www.robotbits.co.uk/motors-gearboxes/sm-s4303r-continuous-rotation-servo/prod_65.html

If I get two of these..... each for 1 wheel, and I want the buggy to run for at least 40 mins. What power and how would I power it. Im confused bout this. Like Would I not need to power the servos seperately? The Arduino board requires about 6V (if i remember correctly). So If power the arduinoi board with 6V, how will I give extra power to the servos?

The IR sensors take 5V. And I will be using 2. I will also use couple of LEDs
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I don't think you connected the grounds, Dave.
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It isn't voltage you need to worry about so much, it's amps.
Rechargeable batteries are rated in mAh.
AAs run around 2000mAh and upwards, so for a 100mA current draw, you should be good for 20 hours.
Higher current draw will not scale quite so well.
Another advantage is that cell voltage is a bit lower, so 4 NiMh cells will typically give 5V, not 6.
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I recently made a buggy using picaxe at uni. I want to know a list of things I would need to make a buggy.

Why not, checking out how you did the first one and change a few things?
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What do I need to make a arduino buggy
Most any code posted on the forum this week would do.
@Paul: I guess that one went right over their heads - just like their use of the term 'buggy' went right over ours.  If we knew what they were talking about we might be able to help.

Don
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Ok, thnx for all your postsso far. Ive been busy so I havnt started nething yet practically with the moving robot I want to make. However I have a few questions whcih I think i need to know the answer to before actually trying to make anything.

Firstly, am I right in thinking that a continuous rotation servo only needs to be connected to one control pin as opposed to a motor, as a motor would coding such as high 1, low 2, to make it go forward/reverse.?

But then can the servo go both foward and back using coding? (I havent looked at coding for servos yet)

Is it possible to connect a motor through the breadboard without a motor driver?, (I have tried to but I coudnt see anyway)

If I use motors, why do i need a gear system? (for example I have a couple of small 5v motors, which I think is one set gear/system/speed)


Im just learning, so help from you pros will be really beneficial  smiley
I want to understand the simple stuff, before making it.


Aslo, finally,
I would like to just buy servos, motors, just as spares, so that I can play round with them in future. I only have Arduino mega (ATmega1280), breadboard, 2 simple 5v motors, 3 digital output IR sensors, and LEDs, LDRS, wires etc.

What motors/ any motor drivers/ servos would you recomend?
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Modded servos are quite nice and easy to drive, but remember that they're not really specced for continuous usage - you may need to replace them dependent on how you (ab)use them.
Metal-geared versions are more robust but a lot more expensive.

You can't drive ordinary DC motors directly from an I/O pin, unless it is a really tiny phone vibra, in which case it won't be able to do much work.
To control a DC motor, use a transistor for a single direction, or an H bridge for bidirectional.
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ok. So If i wanted to drive a motor bi-directionally, would I need to get a chip like in the pic at the bottom of this page? http://letsmakerobots.com/node/10023
I will research h-bridges, but if theres a specific chip I need, Could you tell me which one?
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Fairly popular H-bridge chips are L293D and L298D, but choice of chip depends on choice of motor.
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