Earthquake alarm by AMAN DEEP

自制地震警报器

（译者按：不知为何，地震总在人们熟睡的夜里发生，还是说人们处于休息状态时就放松戒备了呢？这款简单的报警装置，很大程度能在灾难发生时，让使用者不会过早入土为安。）

原文出处：http://www.instructables.com/id/earthquake-alarm/?ALLSTEPS
原作：Aman Deep
译者：Kalimov

Picture of earthquake alarm
Earthquakes are sudden and cannot be predicted when, where and how harmful it could occur.
地震来得突然，也无法预报出发生在何时何地及如何凶悍。

so here is an instructable for how to make an "earthquake alarm" which could be very helpful especially at the time when people are sleeping .
这是一份教程，告诉大家如何做一个地震警报器，在人们熟睡时特别有效。

this earthquake alarm cannot predict about the earthquake but can warn or notify you while the earthquake is hapenning.
这款地震警报器不能预知地震，但能在地震发生时做出警报和提醒。

Step 1: Material and tools required

一、所需材料和工具

Picture of Material and tools required
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-one relay (5v or 12v)
-one slide switch
-one 9v battery with connector
-one pcb standoff screw
- two screws 3mm and 1 nut
-one slide switch
-copper wire (38 swg , 1foot long)
-two red led (3mm)
-one zero pcb board
-solder and soldering iron
-glue gun
-iron sheet strip (0.5mm thick , 10cm x 1cm)
- one AA size cell
-flexible wire

• 一个继电器（5伏或12伏）
• 一个滑动开关
• 一枚9伏电池，配上连接头
• 一枚PCB支撑螺丝
• 两枚3毫米螺丝和一个螺母
• 一个滑动开关
• 铜线（38码，一英尺长）
• 两个红色LED（直径3毫米）
• 一块空白PCB板
• 电烙铁与焊锡
• 热熔胶枪
• 铁片（0.5毫米厚，10厘米x1厘米）
• 一节5号电池
• 软导线

Step 2: Circuit diagram (connetions)

二、连接电路图

Picture of Circuit diagram (connetions)
this is the circuit connections for the earthquake alarm
如图所示，这是地震警报器的电路连接图。

Step 3: Pendumul switch

三、摆荡开关

Picture of Pendumul switch
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-take the metal sheet (you can also use thick aluminium foil ) and cut 1cm wide strip about 10 cm long.
拿出金属片（你也可以用厚厚的铝箔），剪出1厘米宽大约10厘米长的长条。

-now take the AA size cell and roll the metal strip to make a NINE (9) shape as shown in pictures.
现在把金属带绕在5号电池上，做成图中所示的“9”字形。

-measure about 2 cm and cut the rest of strip (still maintaining the '9' shape).
量约2厘米长度，剪掉剩下的金属条。（仍旧保留“9”字形）

......

-now take the pcb standoff screw and screw up the 3mm screw into it.
现在拿出PCB螺丝，将3毫米螺丝旋进去。

-take about 5cm of copper wire and make a loop shape by winding it on the standoff screw, after that solder it to make it fixed and conducting .
用约5厘米长铜线，弯成一个圈在PCB螺丝上，然后把它焊死固定，让它导通。

-now take the rest of copper wire and solder it to the loop on the standoff screw.
接着把剩下的铜线焊在PCB螺丝上的圈上。

now with the help of screwdriver, make a hole on the pcb for the 3mm screw and fix the screw on pcb as shown in pictures
现在借助螺丝刀在PCB板上弄个洞给3毫米螺丝，如图所示那样把螺丝固定好。

Step 4: Connections

四、接线

Picture of Connections
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-according to the circuit given, connect all the components together on the pcb.
根据之前给出的电路图，在PCB板上连接所有元件。

-after all connections done , take the depron piece and stick it to the back of pcb with the help of glue gun.
在连接好所有东西之后，用热熔胶枪把一片泡沫塑料粘在PCB板背面。

now where to place it ?? , my suggestion is that you should stick it on the wall (where the pendulum is not affected by the flowing air or you can cover it up in a box and fix it on the wall )
现在把它放在哪儿？我建议你把它粘在墙上。（这样摇摆开关就不会被气流所影响，或者你用和盒子把它装起来再固定在墙上。）

Step 5: Working video

五、视频演示

（译者后记：其实这东西不光可用于地震警报，还能用作他用。利用摆荡开关这种特性，装在门上可以变成防盗警报，配合现在物联网的特性更能有效放到。本人倾向于把它连到芥末喷雾上使用……）