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R11 - Construction

The video about R11


Mecanics

R11 is the type of rover that will unify my "Zoo" of vehicles that populated my RoboSpatium in the past. The first prototype already runs in my robot room, but there is still a lot to be done to make it a reliable explorer, thus this documentation is still under construction as well.

Rover R11 with tracks
Abbildung 1:
The mechanics is made of PLA using a 3D printer. Even while the chassis is large enough to implement all of the electronics, I will add a couple of millimeters in width and height to make installing the components more comfortable.

Electronics

Parts list:
I got all parts from my sponsor RS Components, thus the links in the table point to their online shop.

Part Pieces RS Components Remark
Raspberry Pi 1 137-3331 Central brain
Raspberry camera module 1 913-2664 Video stream
Servo for continuos rotation 2 781-3046 Wheel drive
Standard servo 1 781-3058 Tilt camera vertically
PLA filament 1.75mm 1 832-0273 1kg is enough for more than one robot, note the correct diameter for your printer!
LEDs white 25 810-6702 25 per package, enough for 2.5 rovers or for brighter illumination.
L324N 1 533-8215 Quad op-amp for headlights
5V step-down converter 1 796-2132 Get 5V for the Raspberry Pi and the servos.
IR diode 1 810-8247 IR sender (option)
TSOP32536 1 773-3779 Infrared receiver (option)
Elektrolytical capacitor 100μF 25 737-4159 Packing unit is enough for more than just one rover
Schottky diode 3A 10 654-7224 Packing unit is enough for more than just one rover
Resistors 100Ω 20 125-1174 Packing unit is enough for more than just one rover
Resistors 390Ω 25 683-3590 Packing unit is enough for more than just one rover
Resistors 1kΩ 10 148-506 Packing unit is enough for more than just one rover
Resistors 2kΩ 10 148-578 Packing unit is enough for more than just one rover


Electronics of Rover R11
Abbildung 2:
Most of the electronics is on a tiny board that can be plugged on the GPIO header of the Raspberry Pi.
Schamatics of Rover R11
Abbildung 3:
Circuit layout:
The infrared interface is an option.

Software

The simple version of my software uses the Raspberry Pi in Access Point mode. With the web server Apache running on the Pi you can control the robot through a browser interface, same as in my RoboSpatium. The step-by-step instruction for the installation - starting with a fresh install of Rasbpian - is written in the "readme.txt" of the download package.

Download

The download package includes the 3D files and schematics.
The software is currently not part of the package, I am still writing on it! The CAD model is also not complete, because the robot is still under construction and I will alter almost all parts at least slightly in the not so far future!

Test drives

You can control R11 in my RoboSpatium.

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