Hold_only_board.gif 23.01.2017: board PCB designed. Version 1.0 27.01.2017: etched and drilled, to be used for Melauton. 29.01.2017: board mounted on the top of the melauton robot. 07.02.2017: another copy of the board made, etched and drilled, with slight improvements in component placement. This board is not for melauton. 14.10.2017: Considering to use this board for Llor, bidirectional solenoids. Rejected idea, as this PCB is physically too large for Llor.