| 摘要 |
PURPOSE:To forcibly discharge the prescribed load without providing a special switch by collecting a signal of an input power source OFF, and forcibly discharging the load with a dropper used for dropping a voltage in a normal state as a switch. CONSTITUTION:When a power source switch SW1 is closed, the b contact SW2 of a relay RY is turned ON to conduct a transistor Q3. When the base potential of a dropper Q2 becomes almost zero and the dropper Q2 is turned OFF, an electric energy charged in a load 2 and a capacitor C4 is simultaneously forcibly discharged momentarily through a diode D1, a resistor R1 and a transistor Q3. Then, a microcomputer load 1 can be operated by the charge of the charged capacitor C2. |
