Mantis Robot Arm - Part 1 - The Gripper

This is the first video about my new robot arm called Mantis. Just because of the looks of the eye like encoder:

I plan to do several videos about the assembly. The parts will be listed below. I try to supply you with a link. Besides I'm quite busy now so don't expect soon to many.

BOM:

Part	Quantity	Links (some are affiliate links!)
Printed parts	1	http://www.thingiverse.com/thing:1480408
Vitaflex 30	10g	http://www.smooth-on.com/Urethane-Rubber-an/c6_1117_1142/index.html
Servo MG 996R	1	AliExpress.com Product - MG996R	search ebay
Bearing DIN625-624 4x13x5mm	4	search ebay
MR83 3x8x3mm	1	search ebay
M4x40	1
M4 Nut	1
DIN 125 - 4	3

Adding an extra display to my laptop.

I bought on of these 9,7" LCD displays about a year ago and and last weekend I finally got some mood to build a case for it. Originally I planed to use it as display for my home automation system but this is currently far away from becoming reality. So I decided instead to use it as second screen on my work laptop I got this one cheap on ebay and since it has a native DisplayPort it's works like a charm.

The case is of course 3D-printed.

The adapter is from abusemark.com and shipped from Japan in a fair amount of time and is working fine. I have an older version as the current one but had no trouble at all.
I mountet the power switch outside but I think this is optional.

BOM:

Part	Quantity	Links (some are affiliate links!)
Printed parts	1	http://www.thingiverse.com/thing:1464258
9,7 " Lcd-screen LP097QX1	1	AliExpress.com - LCD Display LP097QX1
Displayport and Backlight driver	1	http://abusemark.com/store/index.php?main_page=product_info&products_id=47
DisplayPort cabel	1	ebay DE
USB cable	1	ebay DE
DIN 7991 M3x8	22	ebay DE - DIN 7991 M3x8

Building my own onewheel "skateboard"

Since Adam Savage from Mythbusters posted his best gadgets 2015 I fall in love with the OneWheel, but oblivious I would never by one if I can make one by myself. After watching some youtube videos about it, the requirements are not that hard and this is finally the opportunity to build my own motor controller. You can watch the first parts on YouTube:

Here is the CAD model.

The motor sits in the tire, so I needed to design my own rim.

 The rim half will be 3D printed, it's also a nice test how tough the prints will be. The frame is made of aluminium rods. I'm using a 250W electrical bicycle motor I got cheap on ebay.

 To fit inside the tire I had to remove the spokes mounts, luckily we have a fablab with a late in town, so I could remove them:

The Motor will be mounted to the aluminium frame with some rood. I cut a thread in the center and and some counter screws sideways.

I also drilled holes in the motor and mounted screws sideways to mount the 3d printed rim parts. With the basic frame completed it starts looking like something to drive with:

That's all for now, I keep you guy updated about the progress. And I will publish the cad, code and electronics if I'm done. Batteries will be LiFePo4 cells, they are lightweight but high capacity and the best thing compared to normal LiPo batteries are: They can't burn ^^ As motor controller I found a interesting product called TI instaspin-FOC. I cover this topics later.