@dnautics where do I order these chips <i>with</i> neurons giving me patch membrane potentials. I really want one of these chips - a link will do. But it has to come with neurons not two sources and i have to culture them. Again, chips, with deliberate microcircuits in 3D with neurons already on it and its a plug and go. Thanks I think you are really awesome if you give me this link. Otherwise you are full of you know what ... :-).