3615 Señor is a variable geometry collective inspired by the open source model, open to all enthusiasts of new technologies applied to artistic creation. These self-taught electronics and computer scientists meet regularly at the Superseñor workshop (micro-publishing workshop), at the Friche Friche de Besançon. Meetings every two weeks give rise to exchanges of projects, knowledge, information and techniques. It is an open hacklab and for the moment informal: communication by word of mouth only. Some meetings become mini-workshops with topics such as Python development, Processing, discovery of Raspberri Pi or Arduino hardware, see computer security, or the open-source alternative.