| 摘要 |
<p>PURPOSE: An LED lamp is provided to protect a battery by stooping automatic charging when a discharge voltage is low or heat is generated due to the damage of a battery. CONSTITUTION: A power supply unit(6) receives commercial power, drops it by 5 voltage and supplies it to a microprocessor(5). A first switching device(9) selectively supplies the power charged of the battery to a voltage regulator. A third switching device(12) selectively receives power supplied from the voltage regulator and supplies it to a light emitting diode.</p> |
