Trying to run a PIC 16F84 with 2V i came to tihnk if there is any possibilities to make a LED to run with only one NiCd that has the output valtage of about 1.2 V. Led needs about 1.6 V. The system should not have any fancy IC's and it should fit in the size of half of an AAA-cell. Virtual beer for the best idea ! -------------------------------------------------------------------------- PTM, pasi.mustalahti@utu.fi, ptmusta@utu.fi, http://www.utu.fi/~ptmusta Lab.ins. (mikrotuki) ATK-keskus/Mat.Luon.Tdk OH1HEK Lab.engineer (PC support) Computer Center OI7234 Mail: Turun Yliopisto / Fysla, Vesilinnantie 5, 20014 Pt 02-3336669, FAX 02-3335632 (Pk 02-2387010, NMT 049-555577) --------------------------------------------------------------------------