After I got comfortable programming and building with an Arduino, I decided to build a robot. I did not have any particular type in mind, so I wracked my brain (and the internet) for cool robot ideas. Eventually, somehow the idea popped into my head to build a robot that could climb trees. At first I dismissed the idea as beyond my skill level, but after further thought, and some time in Sketchup, I decided to take a shot at the challenge. This is the result of my efforts.
I started out by creating a basic design in Sketchup. The robot was to consist of two segments, joined by a spine which could be extended or retracted. Each segment would have four legs with very sharp points as feet. To climb, the legs on the top segment would pinch together and the sharp feet would dig into the bark, securing the robot. Then the spine would be retracted, pulling up the bottom segment. The legs on the bottom segment would then grip the tree, and the top segment would release. Finally, the spine would extend, pushing the top segment upwards, and the process would repeat. The climbing sequence is somewhat similar to the way an inchworm climbs.
In my original design (show in the images above), all four legs in each segment were controlled by one highly geared down motor. I decided to ditch this idea for a few reasons. Firstly, I could not find the type of spur gear needed to mesh the legs together. Also, with all the legs linked together, the robot would have a hard time gripping uneven surfaces. Finally, I decided that the robot would be much easier to build if the motors drove the legs directly.
The other significant change I made from my original design was the way the spine worked. In my model, I used a rack and pinion type gearing system to extend and contract the spine. However, I could not find the necessary parts to build such a system, so I ended up using a threaded rod coupled to a motor to actuate the spine.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Maker Business — To make it through a tough business cycle, layoffs should be a last resort
Wearables — Little pixel jackets
Electronics — Aliasing is ugly!
Python for Microcontrollers — Python on Microcontrollers Newsletter: CircuitPython supported by 70 SBCs and more! #Python #Adafruit #CircuitPython @micropython @ThePSF
Adafruit IoT Monthly — OpenCV Critter Cam, LoraWAN on Raspberry Pi 2040, and more!
Microsoft MakeCode — MakeCode Arcade Turns One!
EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey
New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — New Products 3/03/2021 Feat. Adafruit Feather RP2040! @adafruit #adafruit #newproducts
Sorry, the comment form is closed at this time.