| 摘要 |
PURPOSE: A warning circuit is provided to selectively and conveniently light a white LED and a reddish device and to reduce the unit cost of components by creating a constant voltage and a reverse voltage by using a single LED module. CONSTITUTION: A third switching unit(38) controls the interval of a first switching unit(24) and a resistance. A reddish device(30) is wired with a white LED to a reverse direction. A second switching unit(32) controls a route of the white LED, the reddish device, and a ground terminal. A second battery(36) applies a reverse voltage to the route between the white LED, the reddish device, and the second switching unit. A fourth switching unit(34) controls the white LED, the reddish device, and the second battery. |
