Mittwoch, 12. Juni 2019

Mantis Rover Mecanum Robot Platform

This is the second part of the build of the moving base for my robot arm project. The Rover is now fully operational.

I added a project:

You can download the cad files from:
or the stl at thingiverse:

The PCB files for the motor drivers are available at:

I post regular updates on my Instagram feed:

Links (some are affiliate links!)
 The Motors I used
24V 440 RPM

The BMS of my Battery Packs

The Microcontroller
STM32F4 Black VET6

 Remote Taranis Q X7
3.2V 6Ah
LiFePo4 Cell

Montag, 20. Mai 2019

Moving Robot Platform (3D printed mecanum wheels

This is the first part of the build of the moving base for my robot arm project. I designed 3d printable mecanum wheels and made a steel frame.

Sonntag, 12. Mai 2019

3D printed 6-Axis Robot Arm - 2019 Update

It's been 4 years since I started this project. Its had some downs and a lot of ups. Time to give you an update about whats going on.

Notice: "No robots were harmed during making this video."

I post regular updates on my Instagram feed, if you are interested in regular updates and other projects:

Mittwoch, 23. August 2017

Channel update Maker fair Hannover 2017


it's been a while. I'm still around form 26 to 27 of August I will show some of my work at Maker Fair Hannover 2017.

I also uploaded the Inventor files of the Robot Arm to github, take a look:

Mittwoch, 13. April 2016

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.


Links (some are affiliate links!)
Printed parts
Vitaflex 30
MG 996R

M4 Nut

DIN 125 - 4

Montag, 4. April 2016

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 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.


Links (some are affiliate links!)
Printed parts
9,7 " Lcd-screen LP097QX1

Displayport and Backlight driver
DisplayPort cabel
USB cable
DIN 7991 M3x8

Freitag, 5. Februar 2016

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.

Sonntag, 23. August 2015

ESP8266 in the wild, WiFi LED controller hack.

Recently I found a cheap (9€) WiFi LED controller on AliExpress:

I bought 2 because I was curious if it would be possible to hack this drivers.

Controller overview:

This pictures show the PCB. As you can see there are pins labeled as RX,TX,GND,3.3V. I simply connected an USB-Serial converter to the pins. The two other pins are GND and GPIO0. If you set a jumper between this two pins, the controller starts in bootloader mode. 

The chip above is a NXP HC245, a 3-state Octal bus transceiver. It is used to drive the N-channel MOSFETS (20N06L - 20 A, 60 V, N−Channel DPAK).

The power supply is a 2 stage design. A AOZ1212 3A Simple Buck Regulator to convert the input voltage to about 5V and an AMS1117 low dropout voltage regulator to get 3.3V.

The pinout for the ESP8266 is as follow (Arduino numbering)
redPIN    12
greenPIN  13
bluePIN   15

// W FET
w1PIN     14
w2PIN     4

// onbaord green LED D1
// onbaord red LED D2

TX GPIO2 @Serial1 (Serial ONE)
RX GPIO3 @Serial

Jumper closed -> start in bootloader mode on Power on.
Jumper open   -> start user program 
I have a simple demo sketch on github:

This can be controlled with openHAB.

You should also take a look at my other ESP8266 project:

Dienstag, 6. Januar 2015

3D printable Robot Arm

This is the first post about my new 3D printable robot arm. It is inspired by well known industrial robots but 3D printed. The overall goal is to build a nearly entirely printable and cheap robot arm with at least 5 degrees of freedom.

I'm currently done with the base section and the forearm. I plan to document this project as a video log on Youtube. 
The first video is about the base section, the second about the forearm:

Rotary plate and conclusion:

I hope you excuse the video and audio quality as I'm still learning this video stuff. 
Of course you can download the stl files from thingiverse:

The parts are completely printed in ABS. This took about a week. I used 12% 3d honeycomb infill and slic3r 1.21e. It's about 1.2kg filament. 

I don't recommend printing them yet as I need different kind of motors. Steppers are not the best solution for a robot. They provide accurate movement but the torque-to-weight ratio is very bad. I will post updates with future developments. 

Next up is the gripper:

Arm moving with DC-Motors:

I started a project: