BrachioGraph - the cheapest, simplest possible pen-plotter

BrachioGraph is an ultra-cheap (total cost of materials: ~€14) plotter that can be built with minimal skills.

At its heart is a Raspberry Pi Zero and some relatively simple custom software, driving three servo motors.

The mechanical hardware can be built from nothing but two sticks, a pen or pencil and some glue. No tools are required.

Almost everything required can be found in a desk or kitchen drawer. The entire device can be built with no special skills in about an hour.

Documentation

Name		Name	Last commit message	Last commit date
Latest commit History 265 Commits
docs		docs
images		images
test-patterns		test-patterns
tests		tests
.gitignore		.gitignore
.readthedocs.yaml		.readthedocs.yaml
.travis.yml		.travis.yml
LICENSE		LICENSE
README.rst		README.rst
bg.py		bg.py
bgt.py		bgt.py
brachiograph.py		brachiograph.py
changelog.txt		changelog.txt
linedraw.py		linedraw.py
pantograph.py		pantograph.py
pen.py		pen.py
plotter.py		plotter.py
pulse_widths.ipynb		pulse_widths.ipynb
pyproject.toml		pyproject.toml
requirements.txt		requirements.txt
turtle_plotter.py		turtle_plotter.py