| 摘要 |
PURPOSE: A circuit for sensing interrupt is provided to reduce the costs and to minimize the size of printed circuit boards by using a small quantity of the parts. CONSTITUTION: A circuit comprises a bridge diode (BD141) for making full-wave rectification by receiving a utility power supply, a smoothing part (100) for smoothing the rectified signal obtained from the bridge diode (BD141), and an interrupt generating part(200) for generating an interrupt signal based on the rectified signal. The interrupt signal is generated as a low potential if a pulsating waveform of the rectified signal is above 0.7 V and as a high potential if the waveform of the rectified signal is below 0.7 V. Further, a micro computer (10) reads the number of the inputted interrupt signals and processes the interrupt signal. |
