This work presents a three-dimensional geometric resolution method to calculate the complete inverse kinematics of a 7-degree-of-freedom articulated arm, including the hand itself. The method is classified as an analytical method with geometric solution, since it obtains a precise solution in a closed number of steps, converting the inverse kinematic problem into a three-dimensional geometric model. To simplify the problem, the kinematic decoupling method is used, so that the position of the wrist is calculated independently on one hand with information on the orientation of the hand, and the angles of the rest of the arm are calculated from the wrist.

This article describes a bipedal walking algorithm with inverse kinematics resolution based solely on geometric methods, so that all mathematical concepts are explained from the base, in order to clarify the reason for this solution. To do so, it has been necessary to simplify the problem and carry out didactic work to distribute content. In general, the articles related to this topic use matrix systems to solve both direct and inverse kinematics, using complex techniques such as decoupling or the Jacobian calculation. By simplifying the walking process, its resolution has been proposed in a simple way using only geometric techniques.

September is fast approaching and so is London Design Festival and the Digital Design Weekend! Now in its sixth year, the Digital Design Weekend will bring together again over a hundred artists, designers, engineers, technologists and of course the public to celebrate and share contemporary digital art and design, take part in interactive installations and labs, engage in conversations, and learn about processes. Over the weekend we will be taking over the Museum to showcase a huge programme of cutting edge, international digital projects, but also performances, talks, open workshops, labs and family-friendly activities, all exploring engineering, making and collaboration. The Weekend will include many protoyping events and workshops, such as the Open IoT Design Sprint with Mozilla Open IoT Studio & collaborators* to make & share prototypes that serve local communities & celebrate the unique affordances of physical places; a Biosynth workshop to introduce basic electronics and biology interactions by Andreas Siagian from Indonesia's Lifepatch; a Storm Laboratory with Loop.ph to experience the turbulent nature of geophysical air dynamics, as well as a hydroponic system workshop, a co-design performance workshop and many more. There is lots for young people and families to enjoy, including, a Build Your Own Pavilion Young Architects Challenge by the Serpentine Galleries and Kidesign challenging budding young architects to design the pavilions of the future; Scan the World by MyMiniFactory, inviting families to help scan the V&A's collections and see 3D printers in action; a Tanglebot workshop with unruly robots, wool, Lego and Raspberry PIs, as well as many family-friendly installations and other activities.