Water-level alarm device

A technology of water level alarm and timer, applied in the field of water level alarm device and liquid level monitoring device, can solve the problems of complicated circuit design, accidents and high price, and achieve the effect of safe and simple circuit design.

Inactive Publication Date: 2012-05-16
蔡敬友
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sometimes, because of being too busy and tired, I forgot to check the water level in the electrical appliance, resulting in accidents due to lack of water
At present

Method used

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Embodiment Construction

[0007] The present invention will be further described below in conjunction with accompanying drawing.

[0008] Such as figure 1 As shown, a water level alarm device includes two detection electrodes placed in water, a detection circuit connected to the detection electrodes, and a speaker Y connected to the detection circuit; the core of the detection circuit is composed of a 555 timer and several capacitors and resistors. Multivibrator; one of the detection electrodes is connected to pins 2 and 6 of the 555 timer, and the other detection electrode is grounded through capacitor C1; a speaker Y is connected in parallel between pins 3 and 8 of the 555 timer; pin 7 of the 555 timer Connect to the power supply through resistor R1 and ground through resistor R2. The core of the circuit is a multivibrator composed of 555, capacitor C, resistors, etc. In addition, there are detection electrodes, speaker Y, etc. In order to increase the service life of the speaker Y, the negative p...

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PUM

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Abstract

The invention discloses a water-level alarm device, belonging to the technical field of liquid level monitoring. The water-level alarm device comprises two detection electrodes put in water, a detection circuit connected with the detection electrodes, and a loudspeaker Y connected with the detection circuit, wherein the detection circuit is a multivibrator composed of a 555 timer and a plurality of capacitors and resistors; one detection electrode is connected with pins 2 and 6 of the 555 timer, and the other electrode is connected to the ground through the capacitor C1; the loudspeaker Y is connected between pins 3 and 8 of the 555 timer in parallel; and a pin 7 of the 555 timer is connected with a power source through the resistor R1, and connected with the ground through the resistor R2. The invention has the advantage of safe and simple circuit design, and can automatically sound the alarm when the liquid level reaches the alarm position.

Description

technical field [0001] The invention relates to a liquid level monitoring device, in particular to a water level alarm device, which belongs to the technical field of liquid level monitoring. Background technique [0002] In life, all kinds of water-filled appliances are everywhere. At present, most of these products do not have a water level monitoring device. Users need to judge the water level by themselves, and then determine whether to add water to the product. Sometimes, because the work is too busy and too tired, I forget to check the water level in the electrical appliance, resulting in accidents due to lack of water. At present, there are also some water storage appliances with water level monitoring devices, but the circuit design of such products is complicated, resulting in high prices. Contents of the invention [0003] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a water level alarm device, which aut...

Claims

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Application Information

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IPC IPC(8): G01F23/22
Inventor 蔡敬友
Owner 蔡敬友
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