Juice Box Robot Plan, Needs review

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***UPDATE MARCH 11: After reading the comments here I have made a couple of changes to my plans. I have replaced the PICAXE 18 with the PICAXE 28 and appropriate board. I have switched to 3 AAA cells as a power source and I have changed to servos to power the "arms". When I wrote the original post used the word "arms" as a placeholder, but while I always intended to have actuation it was never actually going to be a set of arms. One servo will power a number of separate actions that allow the robot components to fold out of the box (for example the gearboxes descend so the wheels stick through slots in the bottom of the box). The other servo will be used to actuate the tabs of the juice box like "ears". I also have a few new questions with my updated plan. Wil the projecct board have the correct outputs to run the motors forward/backwards and also the servos? Or what else do I need? And if anybody has experience with this board will it be able to fit in the 4"x2"x1" space of a juice box (the website doesn't list a size).***

I want to create a mobile robot project that hides inside of a juice box. While I have done robotics before in the FIRST robotics competition but never somethiing working with smaller components like those I will need here. I have talked to some people from a local robot shop in Calgary, AB, Canada "Solarbotics" and together we have come up with a list of compenents to make this project a reality:

PICAXE 18 Projecct Board: https://solarbotics.com/product/28460/

***PICAXE 28x1 Chip: https://solarbotics.com/product/28480/

***PICAXE 28 Project Board: https://solarbotics.com/product/28510/

PICaxe Programming Cable: https://solarbotics.com/product/28405/

A Remote Control IR Receiver: https://solarbotics.com/product/TSOP4038/

GM3 Motors for Drivetrain: https://solarbotics.com/product/gm3/

***Tiny Gear Motor Mounts for Wheels: https://solarbotics.com/product/gmw/

Pager motors to actuate arms: https://solarbotics.com/product/gm15a/ & https://solarbotics.com/product/gm15/

***Micro servos for actuating features: https://solarbotics.com/product/25500/

Lithium Ion Batery: https://solarbotics.com/product/battr15/

Li-ion Charger: https://solarbotics.com/product/50834/

***3 AAA Cell Holders for power: https://solarbotics.com/product/bholdaaa_1_cell/

I will CAD and 3d print the chassis itself. Does this seem like a set of components that will work effectively together or do you have some suggestions how to improve it. Also, where can I find a good tutorial on how to program the IR receiver. 

Thanks in Advance, Alex

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One thing I see did not get included at all was

a motor driver. Actually, you will need a pair of motor drivers since you are planning on using 4 motors. Second, you won’t need to “learn” how to interact with the IR receiver. PICAXE chips come preprogrammed being able to understand the Sony protocol. You just need to use the proper command, which I believe is irin or infrain. I don’t rightly recall. The geared pager motors say they only have .5 oz/in of torque, but, their speed is 920rpm or just over 15 rev/sec. I am not sure, without seeing your plans for an arm, they will really do what you are after.

PS: I just recalled that the PICAXE 18 board you are looking at has a darlington bridge(?) onboard. I am guessing that is what is being planned for use to drive the motors.

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Update

Thanks for all your advice! I have updated the original post with the updated plan, take a look.

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Yup, its a good one

I can tell its a good one because you have successfully re-invented the Start Here Robot.

I would order the Start Here kit (and save yourself a few bucks over buying everything stand-alone) then add the few extra parts you show (extra servos and the like).