Help with Brat clone

Community General Discussions
1

Hello my son is trying to make a lynxmotion brat clone we have bought one of these 6dof clones/servos etc off ebay, whats the cheapest and easiest way to get it walking?I have an ardiuno board, but I understand I will need a servo controller? whisch one do I buy and how do we code it?

 

cheers

Peter (UK)

 

2

Hi there thanks, Sorry this

Hi there thanks, Sorry this is the kit:

http://www.ebay.com/itm/6DOF-Biped-Robotic-Humanoid-Educational-Robot-Kit-Servo-Bracket-Mechanical-Arm-/261570892289

we have it assembled with all the servos etc, we just need to controll it.


im well versed in code mostly c#/java but never done anything like this we want it to be an easy approach as we hope to get this included in code club for 9/10 year olds.

3

There are several options

You will need power first and formost to drive the servos with:

I would recomend a 7.4v lipo rated at 2000mah or more. connected to a UBEC

----------------------------------------------------------------------------------

You could get a dedicated servo driver board like This

Or a more general Arduino like board that will allow other things like sensors as well as the servos

Then there is this option: An Arduino or compatable board and an i2c type servo driver board. With this option you have sensor options as well as the above.

All have pros and cons and all will be around the same amount of coding.

4

Hi thanks it really is a

Hi thanks it really is a minefiled so many options…

5

You don’t really need a
You don’t really need a servo controller with an Arduino – the Arduino’s “servo” library can drive up to 12 hobby RC servos at the same time. But you will probably want to make some sort of a breakout board for it, so that you have something to plug all those servo plugs into. You can make one easily from a perma board and some pin headers.

I suppose the servos and the battery are the most expensive parts of this.

6

I did not see you had an Arduino already :slight_smile:

This would be a cheaper option then along with the standard Arduino servo libary that deshipu spoke of.

I still recommend the Lipo and UBEC though.

 

7

Thanks for the help I have

Thanks for the help

 

I have an Arduino;

 

So I need

 

A 7.4v lipo rated at 2000mah or more. AND A UBEC will this power the Arduino and the servo driver board?

I have been told I can use one of these  http://www.brookstone.com/mobile-2600-mah-charger

A Servo driver board like an Adafruit  or Servo Drive shield module I2C PCA9685 For Arduino?

 

Is that it?

8

See my below relpy

See my below relpy.  This would be the cheapest option for you since you have an Arduino :slight_smile:

I’m not sure about that USB battery pack to run servos.  I assume it might have have 2 18650’s in it with a 5v regulator (just guessing). I use a similar one to drive controllers, but have never tried to drive motors with it.

I would still recommend a seperate 7.4v lipo and UBEC running the servos.  Power is key here :slight_smile:

You could try AA rechage batteries, but I like lipos due to them giving better power out for a smaller physical size and weight.

Sorry to be so confusing.

9

kin ell this is confusing I

kin ell this is confusing I have an Arduino Uno thanks