| 摘要 |
Connected in circuit between the battery and the light bulb in a flashlight is a slide switch and an electronic forward converter. The slide switch has an OFF-position, an ON-position, and a spring-loaded variable BOOST-position. In full BOOST, the electronic forward converter operates such as to increase the magnitude of the voltage applied to the light bulb by a factor of about 1.5; thereby increasing the light output from the flashlight by a factor of about 4.0. However, at that degree of BOOST, if indeed maintained on a continuous basis, the life of the light bulb will be shortened to about 15 minutes versus about 50 hours when used in the normal ON-position.
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