Menlo Park-based Mayfield said Wednesday that it has added three new entrepreneurs in residence to the firm. Mayfield said that Martin Eberhard, co-founder of NCD, NuvoMedia, and Tesla Motors; Marc Tarpenning, of NuvoMedia and Tesla Motors; and James Phillips, founder of Akimbi Systems, have all joined the venture firm. NuvoMedia was backed by Mayfield, and was acquired by Gemstar/TV Guide; Akimbi Systems was also Mayfield backed, and was acquired by VMware. The firm said the three will explore opportunities in the cleantech and enterprise sectors.