| 摘要 |
PURPOSE:To facilitate an easy alteration of the working specifications, by selecting the working specifications of a timer by means of a conductor pattern which is easily cut. CONSTITUTION:A relay 31, a timer IC32, etc. are package by on a printed circuit board 30 and controlled by a counter circuit provided in the timer. The conductor patterns 20-25 which are connected to analog switches respectively are distributed along the fringe part of the board 30 so as to be easily cut. The holes 34 and cuts 35 are formed at the fringe part of the board 30. Then a driver is inserted into the hole 34 and turned to easily cut an optional conductor pattern. The pattern to be cut is selected to facilitate the easy alteration of the working specifications of the timer. |
