| 摘要 |
The circuit controls the cooking time according to the variation of the input power voltage. The circuit includes a voltage sensor (1) for detecting the input voltage, a first (2) and the second (3) comparators for comparing the higher and lower input voltage than the reference one, a microprocessor (4) with a ten-second timer (41), timers (42,43,45), and a magnetron (5). When two comparators (2,3) detect high voltage, the difference time subtracted the time measured by the timer (42) from the time measured by the timer (43) is added to the heating time of the timer (45) to drive the magnetron (5). When both detected voltages by two comparators are low, the magnetron (5) is drived by the time preset by the timer (45).
|
