Earthquake Alarm ----- Earthquake Alarm

Earthquake alarm, Earthquake Alarm Keywords: earthquake alarm Earthquake alarm On the evening of May 12, the author didn't sleep after the afternoon eight-level earthquake, and the light was able to make a seismic alarm in the night, and provided several aftershock alarms in the early morning, and won the family to escape the building. Precious time. The circuit is shown in Figure 1. Body, the base is the aluminum alloy foot, the power supply is supplied to the mobile phone charger after filtering MCR100-6 after filtering, and do not choose 100-8 (too uninterested). Remove the doorbell and flashlight (LED flashlight head), install a sound and light alarm as shown in Figure 2, which provides enough lighting to escape at night. The pendant is combined with the seven heavy spacers of the soldering iron, when the ground is vibrated, when the pendant hits the bottom M sheets, the MCR100-6 is triggered, causing 4 LEDs to lighten, and the doorbell is not stopped. This instrument has been verified in two and a half months. Although my home is more than nine kilometers from the main earthquake zone, I can basically measure the aftershock every day. In referring to the time and magnitude of the broadcast on TV, the author learned that the instrument can measure the main shock energy of 3.5, the instrument can be measured, and one of the instrument is about eight seconds, and the people can feel the arrival of the rumor. At this time we have escaped to near the first floor. According to the information, in the epicenter, the test instrument can provide escape time of the longitudinal wave of about twenty seconds. In Chengdu, you can win a few seconds of reaction for us. It is often the first alarm. After a few seconds, talent feels the shaking of the house. Be The author has experienced a number of strong seismic seismics in six o'clock, and the heart is uneasy. I sent this draft, and the majority of friends can follow. When using, the fine-tuning nut is obtained to obtain different spacing of different spacings at m, and k is turned off the reset button after the shock, so that it is again in an early warning state.

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