how the fingers work

the fingers are moved using wires and tension.

each finger is looped through with a wire/string/line in a top-bottom fashion.

when the top wire is loosened/bottom wire is tightened, the finger curls in its joints, resulting in a "bent finger".

you don't have precise control of each joint movement, but it is simple enough to be controlled by a single actuator (in this case a servo).

here is me just using my own hands as an actuator:

here it is hooked up to as servo and controlled by a potentiometer:

the movement is not smooth because
1) it's controlled by a potentiometer that I am controlling, as seen in the background, and I was unable to move it all the way with one smooth finer motion.
2) the tension in the line was not entirely tight. I need to learn how to tie these well.

now I have a get a bunch of servos.

much credit and thanks to Inmoov once again.

Comments

quick recollection on setting things up

If I can swear that the password is correct, then it's possible that I'm getting the ID wrong. Hadn't logged into the web server in a couple of months and was unable to SSH into it. After an hour or so, I ended up deleting the instance and recreating a clean instance (read: erasing everything). I then realized I'd been putting the wrong ID. apt-get install sudo apt-get install Anyways, some links I visited when setting things up (pretty much a dump of whatever I copy-pasted to notes) : Raspberry Pi http://www.makeuseof.com/tag/optimize-the-power-of-your-raspberry-pi-with-raspbian/ Logging http://docs.python.org/2/howto/logging-cookbook.html Tornado - Python webserver that supports Websocket http://stackoverflow.com/questions/2924991/what-popular-webservers-have-support-for-html5-websocket http://lowpowerlab.com/blog/2013/01/17/raspberrypi-websockets-with-python-tornado/ http://stackoverflow.com/questions/11695375/tornado-identify-tra...

warming up

I still don't have all the parts I need to do what I need to do, but I started working with what I had around. I had a 4-digit 7-segment led which I had ordered previously, but for the longest time I had thought I needed additional parts to make it work. It was only today that I realized that that was not the case. Getting some help from this site , I was able to get the digits fired up: This method uses way more wires than this guy (which uses a serial communications protocol called I^2C), but it's good to see it work. I still do want to try the less-wire led setup, as I would like to try playing around with I^2C. In addition, I had recently purchased an Arduino Pro Mini , which contains all the capabilities of the above Arduino Uno but requires pins/connections to be soldered into the board. I had attempted to solder one part of it (the serial/USB connections) a few days ago (note that this was my first attempt ever at soldering), and the USB-to-Serial interface...

chunk update: most parts printed and assembled

currently: stuff that happened are: wired the fingers added screws to necessary assemblies witnessed first failed print during this: servos haven't come yet, but once they do, we can start installing them into the hand/forearm. as always, credit to the Inmoov project.

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