Piezoelectric Mat as Door Bell

© 2021 Kantor Jurnal dan Publikasi UPI Article History: Received 30 Jan 2021 Revised 10 Feb 2021 Accepted 11 Feb 2021 Available online 11 Feb 2021 ____________________ Keyword: Ecological crisis, Piezoelectric. Converting energy Indonesian Journal of Multidiciplinary Research Journal homepage: http://ejournal.upi.edu/index.php/ IJOMR/ Indonesian Journal of Multidiciplinary Research 1(1) (2021) 103-106 Yuandhana et al, Piezoelectric Mat as Door Bell| 104 DOI: http://dx.doi.org/10. 17509/xxxxt.vxix pISSN 2776-608X eISSN 2776-5970


INTRODUCTION
Ecological crisis is a change in world weather which is getting warmer due to the accumulation of CO 2 gas in the atmosphere. Ecological is caused by burning fossil fuels, such as coal, petroleum, and natural gas, which release carbon dioxide and other gases known as greenhouse gases to the atmosphere. Burning rock coal which is a source of electricity generation, is a contributor to the effects of the ecological crisis in the world (Bamberry, 2010). This caused the world needs new energy sources, such as piezoelectric, etc.
The piezoelectric effect is where a mechanical stress applied to a material with a specific crystalline structure develops an electrical charge. Piezoelectric energy can be harvested to convert walking motion from the human body into electrical power (Howells, 2009). Piezoelectric energy harvesting has attracted wide attention from researchers especially in the last decade due to its advantages such as high power density, architectural simplicity, and scalability (Esmaeeli et al., 2019;Gonzalez-Lagunas, 2017;Fu et al., 2018;Chen et al., 2019;Bae et al., 2021). This results many experiments, including piezoelectric on roads, speed bumps, etc (Walubita et al., 2018;Chen et al., 2017). However, there is no study about piezoelectric on a mat.
The manufacture of piezoelectric mats as house bells aims to show that there is alternative energy for power generation in order to reduce the use of coal in Indonesia. By reducing the use of coal, it will reduce the occurrence of an ecological crisis.

METHODS
We use many resources and several equipment in this project as shown in Figure 1. These were the experimental method used in this study.
1. Put the piezoelectric components on the rubber mat, using nano tape 2. Combine the capacitor with diode (rectifier) using a solder 3. Assemble a a cable circuit to piezoelectric and capacitor using a parallel spans 4. Combine with the cable and the switch, leading to the bell 5. Put the plywood above the circuit 6. Put the anti-slip gel on the plywood 7. Cover the plywood and electric components, using the cloth mat Figure 1 presented the 3D design of piezoelectric mat. The design is created using Google Sketchup, which provides the tools to design something in 3D.

RESULTS AND DISCUSSION
The results of the experiment is that at an interval of 6 hours, this piezoelectric mat produces a different sound of bell, as listed in Table 1. Table 1 shows the relationship between the duration of applying pressure and the amount of bell sound produced. Within 6 hours the mat is kept in front of the door, the mat produces a sound that is not too loud, but after being placed for 12 hours, the mat produces a big sound. So based on this experiment the longer the piezoelectric mat is pressed, the greater the sound produced.  When the piezoelectric mat is pressed, a piezoelectric effect will occur and an AC current is supplied to the diode. Then from the diode the charge is flowed to the capacitor to store charge. The more people who use the mat, there will be a lot of pressure received by the piezoelectric. So that a lot of charge is flowed and stored in the capacitor. Then when we want to use the bell, the charge that has been collected by the capacitor will be channeled to the electric bell as needed. Because the resulting voltage is small, the piezoelectric mats are arranged in parallel.

CONCLUSION
After 6 and 12 hours of experiment, the piezoelectric mat produced the sound of a door bell. This shows the existence of alternative energy for electricity generation.