Project introduction:
This homemade water level monitor operates by magnetic induction.
The principle is that when the water level does not reach the set water level line, the power1Part of the circuit will be in an open-circuit state, the electromagnet is non-magnetic, and the contact block is connected to the contact above under the action of the spring force, so that theledThe circuits of the lamp and buzzer are also in an open circuit state, so there will be no response;When the water level rises to the set water level line, the circuit of the power supply 1 part will be turned on, the current will flow through the circuit, and the electromagnet will be magnetic, and the contact block will be sucked down, and then the circuit of the LED light and the buzzer will be connected. It will turn on, causing the LED light and buzzer to connect to the phone, letting us know that the water is full.
List of materials:
- 膠板 1塊
- 長杆 1枝
- 短杆 1枝
- 接線器 1個
- 開關 1個
- 導線 1條
- 1 battery box
- 發泡膠球 1個
- 螺絲帽 1個
- 1 buzzer
- LED燈珠 1個
Instructions
Step
基本底座
首先將長杆安裝在大膠板上，然後在長杆的中間位置裝上接線器 ，而頂部則安裝一個十字膠板。
十字膠板安裝完成後便把開關安裝在十字膠板上，接著在開關上連接短杆。
最後將電池座跟接線器及開關連上，基本底座便完成。
Step
製作浮波
分別將膠板、螺絲帽及發泡膠球串連一起，再用繩將佢地吊在短杆頭部。
Step
測試
將蜂鳴器及LED燈珠連接在接線器，再將上電池於電池座便可以測試。
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