A one transistor, non-volatile programmable switch includes uni-directional and in some embodiments, bi-directional, states. A support including a body of elongate form is fastened to the syringe, the support includes a device for fixing to the syringe and, at its distal end a device for preventing the connecting of the needle to the tip of the syringe. The longitudinal beams are provided with supports for the panels, constructed such that they allow the panels to hang vertically during the stripping operation.