Cheap, extensible mobile robot design based on Arduino - inspired by Mirobot and others. Many of the parts are 3D printed, using a tool-less pin system to connect to the base plate. The non-printable vitamins are low-cost, common and globally available.
See the Assembly Guides for easy to follow build instructions and links to the printable STLs.
Developed by the Swindon Makerspace (UK) - see LogoBot wiki page and related Google Groups thread
Various photos of LogoBot builds can be found on the Flickr group, please contribute if you build one! Videos are collated in the LogoBot youtube playlist.
Two of the variants are shown below - the basic design and the Scribbler variant that includes a pen lift:
- Help teach electronics, programming, 3D design and 3D printing (both to ourselves and others)
- Highly interactive - to attract/hold attention
- Cheap (Total BOM <£20)
- Suitable for ages 6 - 100
- Simplicity is key - all parts/functionality must be easy to explain and understandable by 6-yr olds
- Solderless (where practical)
- Extensible - more sensors, more functionality
- Personalisable - we don't want lots of bland, generic little robots
- Include a Logo interpreter - as per it's namesake :)
- hardware - all OpenSCAD models, and will contains electronic models in the future (e.g. PCB layout)
- software - firmwares and host implementations
Development planning will be coordinated through the normal Wednesday meetings (i.e. who is working on what). All project members will be given write access to the repo.
The rest of this Wiki page is dedicated to design discussion, collected ideas, etc. For the latest designs, guides and printable STLs, please refer to the github site.
Having discussed a variety configurations, we've settled on the following starter design:
- 2-wheels (stepper driven) with caster(s) - arranged as per traditional Turtle bot
- Front and rear bumpers, each connected to a pair of microswitches - users can choose to remap these switches to control behaviours and/or use them as bump switches
- An RGD LED to give the robot character, located near the top/centre of the robot
- A piezo sounder for audio feedback (R2D2 style noises?)
The first standard extension will include a pen lift and WIFI module, permitting remote control from a phone or tablet using a LOGO command set.
- Central pen with micro-servo lift
- ESP8266-01 Wifi module
- Bluetooth UART - for cable-free programming, inter-bot comms, host interface, etc
- Serial RGB LED (to reduce pin count)
- IR Reflectance sensors - for collision avoidance, cliff detection, line following, following behaviour, etc
- IR transceiver - for interaction with TV remotes and/or other robots
- Ultrasonic distance sensors - for collision avoidance, following behaviour, etc
- Speaker - for complex audio playback (e.g. WAV, MP3)
- Microphone(s) - for sound following/localisation and/or voice recognition/recording
- Light Sensors (LDR,etc) - following behaviour, etc
- Tilt sensor - for "I've fallen over" behaviour, etc
Although the reference design will include a basic dome shell, we really want makers to customise their LogoBot, and a custom shell is a quick way to make a big impression!
Please add suggestions below, and if you start developing a design, then put your name in the Developer column and be sure to include a link to the source files (e.g. OpenSCAD file) - if there's lots of related information (pictures, etc), then create a wiki page for the design.
| Title | Developer | Link to Source | Notes |
|---|---|---|---|
| R2D2 | Jamie | Just his head? or perhaps a basic body as well? Matching program mode that drives piezo/speaker and adds R2 flourishes to movement (such as taking the 270° turn instead of 90°) | |
| Dalek | Add a servo for the probiscus? | ||
| Pumpkin | Halloween fun, with glowing eyes? | ||
| Lego Base | Damian | See Optional Extras | A lego plate lid to fit any of the standard shells |
First draft of pin assignments... uses all the normal pins!
| Pin(s) | Assignment |
|---|---|
| 0-1 | Left spare for later addition of WIFI or Bluetooth UART |
| 2-5 | Left stepper driver |
| 6-9 | Right stepper driver |
| 10 | Piezo sounder |
| 11-13 | RGB LED |
| A0-A3 | Microswitches - Front Left, Front Right, Back Left, Back Right |
| A4-A7 | Spare headers, not usable on the breadboard
A4-A7 are additional analog pins, not located at the edge of the board.