| 摘要 |
<p>PURPOSE:To permit the application for the automatic operations in mass production, working, and the assembly work, by permitting the coping with two kinds of voltage values by only the difference of the printed wiring pattern formed on a bored substrate. CONSTITUTION:A low voltage light emission circuit unit Ul is formed by connecting four light emission diodes 3 and one electric current restricting resistor 4 in series. The low voltage light emission unit Ul is mounted on ten unit printed substrates, and in use of the high voltage of 24V, the series connection of two low voltage light emission circuit units Ul are connected in parallel in five pairs according to the wiring pattern. In use of the low voltage of 12V, all the low voltage light emission circuit units Ul are connected in parallel according to the wiring patter. Since the mounting form for parts is the same independently of the use for the high voltage power source or the low voltage power source, and only the wiring pattern is different, the application for the automatic operations in the mass production, working and the assembly work is enabled.</p> |
