Step 1:

Print all the parts with a 3d printer or you can just send the files to any 3d printing company.you can get the STL files below at the link

https://www.thingiverse.com/thing:1568652.

Step 2:gather all components

step 3: attach servo motor on the body.

Then fix it with screws provided with the servo motor.

step 4: fix the leg

Find a suitable servo horn for the leg and fix it.then attach it to the servo on the body.

then fix it with screws.

step 5: attach feet

for the feet we need to first attach servo motor on the leg like this.

you will find a screw hole there  so make sure you  tight the servo motor properly.

then attach the feet on the leg like this.

Then attach both the feet the same way.

Step 6 : the connections.

first fit all the electronics in the head

Then follow the circuit diagram and make the connections.

step 7 : fix the head

then fix the head on the body to cover all the connections.

step 8: upload the code.

now find the GitHub library in the attachments and upload on Arduino ide , once you uploaded go to the examples check for the library and upload the code you want.

step 9 : add the battery .

now add 4 aa battery and connect it according to the circuit diagram.

step 10: play with it

now the Otto diy is complete and you can play with it now.

If you want more tutorial you can visit my channel junior creator .

for the demo use this link to my YouTube channel:-

 Thank you for your love and support like share and subscribe my YouTube channel and also check my other projects at electronicwings, Bye-bye.