have you ever felt the earthquake in your region ? What the first thing you did ? Shocked and BAMM !
When i was in 11th grade/2nd grade of High School , i made one simple alarm for warning people when earthquake happened . I made it with my co-workers on my school org . Earthquake Alarm had been made from simple and easy-found electrical material . This is the sketch :
1. copper, from single cable
2. thin copper, from fiber cable
3. soldered
4. sound source ,electric bell
5. thin rope
6. paper clips , functionalized as ballast to make a steady vibration triggers
7. section of disassembled bell
8. cable from the bell
1,2,3 . vibration triggers
We made the EA for a week including collect the idea because my EA was slightly deviated from the early concept . For the easier construction , use the household bell because we only had to disassemble the bell, build the vibration triggers and solder it into the copper conductor in the dissembled bell . I used the electric bell for the louder sound because my EA had to display in my school Science Exhibition . For the last , we had to make a ballast for a steady vibration triggers . And for the finishing touch, we had to put the EA on a place that easy to vibrate and we made sure that EA would be secure from any disturbance such as wind or houselizard by covered the EA with see-through paper .
EA can be our first emergency of earthquake , so our activities especially sleep at night will be more comfortable .
Rangga Adryana
Faculty of Industrial Technology - ITB
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