Chopstick Junior 1.0

Let's Make Robots Robots
41

Do you know how the

Do you know how the Polymorph is called in europe ? or is it just me enable to find some here ? :wink:

This looks very interesting to prototype quickly all sort of shapes.

I found something called Plasticroc but it looks more like something that can’t be reshaped after initial work.

( http://www.amazon.fr/Omyacolor-p%C3%A2te-Modeler-Autodurcissante-Plastiroc-Blanc/dp/B001AS1FZA/ref=sr_1_sc_3?ie=UTF8&qid=1384245974&sr=8-3-spell&keywords=plasticroc )

42

Yep, you can find it in e.

Yep, you can find it in e. g. ebay under “Plaast”, “Polymorph” or “Shape Plast”.

The chemical name is http://en.wikipedia.org/wiki/Polycaprolactone

43

Thanks to your first link on

Thanks to your first link on Polymorph I found the chemical name.

I was looking to commercial product names, and you suggested some to look at: thanks!

I feel a bit dumb to forgot I could use ebay as an international provider :wink:

44

Yeah, I am always checking

Yeah, I am always checking ebay first. If not in ebay then it’s basically non-existent :smiley:

45

**Chopsticks Jr. **

Liked your videos!  I enjoyed seeing him in action! thank you for sharing!

46

Amazing Job

Hi there Lumi

I truly loved this little one. So much so, that I decided to replicate one, and it has been a lot of fun
 still struggling with weight constraints (still around 350g, after 14€ in lithium batteries to shave off some 50g) :slight_smile: and definitely struggling with the mechanics of the walk
 J but I will get there


My question is more about the weight. Mine still doesn’t move of the same spot (probably to much weight) and after a few seconds the legs come of and the little one hits the ground (face first  LLL JJJ)

I doing mine with an Arduino Uno as a controller, and I have to use 4 AA lithium batteries for the servos, and a 9V for the Arduino. I believe you used a Nano, correct? What power supply does that take? Do you think the 9V battery is the stressor for the weight factor? Did you screw the servos do the heads? Mine are only plugged in place


 

 

Best Regards

47

Hi Diogo, thanks for keeping

Hi Diogo, thanks for keeping Chopstic Junior alife :slight_smile:

I am running mine with just 4x AA Eneloop for the eight servos and the Arduino Nano and never had problems with that configuration. I assume you UNO will need a bit more juice. I recommend that you run the whole thing with 5x AA batteries and no 9V additional one. You can grab 4.8V for the arduino and the full 6V for the servos.

However, it would help if you would post a robot entry with your progress, so not only me could help you with that problem but all other fellow LMRinas :slight_smile: Good luck and I am looking forward to a new Chopstick Junior!

48

cheers

This one made me want to build it and finally join LMR.

Take a look at my approach Yet Another Chopstick Robot

 

49

I am so happy that Chopstick

I am so happy that Chopstick Junior still animates people to become a robot builder. I have seen yours and I really love it, especially that slim legs.

50

This is a classic, Lumi! I

This is a classic, Lumi! I did see chopstick junior in your blog posts, but don’t know why it took me so much time to finally arrive to the robot page!

51

I love it!

This is fantastic, Lumi - what a wonderful little thing!

I may have to start collecting microservos and give this a go in the future.

 

Did you find the need to add any protection for the Nano on the power supply?

I recently killed a Nano by mistake - too much load on the 5v pin of my poor little arduino.

 

52

Well, i don’t know too :slight_smile:

Well, i don’t know too :slight_smile: But now you are here


53

Actually no, I do not have

Actually no, I do not have any problems with the power. I am running the whole thing with just 4x Eneloop AA, 4.8V in total. There is no resetting the Nano nor burning by too much current draw. I do not have any protection in place, not even a capacitor to protect the Nano for sudden power drop.

Edit: However, with the Nano shield I do supply the power to the servos directly and not through the 5V pin. https://www.robotshop.com/letsmakerobots/node/29709

 

54

cheers!

I have learned the errors of my ways regarding the 5v pin, he he.

Definitely going to have a look at replicating your board after my projects start to near completion.

55

**Awesome and really good robot :slight_smile: **

Hi

I saw Chopstick robot video, it is really very good and impressive, I want to make the prototype of this robot by myself, By watching ur uploaded video and photo, i am not able to recognize component used in this robot. can u please send me the list of component which is used in this robot.

 

Thanks & Regards 

Shantosh Kumar

56

Nice work!
That is really cool! Good job 
 nice movement and fun to see it balance on three legs and wave!

Cheers, Brian

57

Servo numbering

Did you have any specific way you connected the servos like 1-8?