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How waterproof touch switch work?

Large Middle Small Source:Gangyuan View:- Date:2016-11-07 17:51:00

Waterproof touch switch is a kind of functional electronic switch, when using only can make the switch, gently press the switch button to switch the internal structure is accomplished by metal shrapnel stress bounces on and off; Waterproof touch switch due to small contact resistance, crispy feel obvious level of the press, highly complete specifications and other reasons, waterproof touch switch and packaging specifications are diversified, especially is widely applied in household appliances, how to detect the waterproof touch switch for the principle of waterproof touch switch, it is very important. Source port electronic below small make up to you to elaborate the working principle of waterproof touch switch is ?

How waterproof touch switch work?

The working principle of waterproof touch switch:

Example: 220 v alternating current through the bulb H and rectifier bridge, into a dc voltage ripple, as a forward biased, add on the SCR VS and R branch.

Brightness is less than 1. The night to a certain extent, the photosensitive diode D present a high impedance state 100 k or Ω, make the triode V is the wizard, emitter is about 0.8 V voltage, make the SCR VS trigger conduction, bulb H.

2. The daytime brightness is greater than a certain extent, photosensitive diode D present state of bottom resistance Ω 1 k or less, the triode V cutoff, the emitter current output, one-way thyristor VS due to no trigger current block. Current through the bulb H at 2.2 or less mA, bulb H cannot shine. Resistors R1 and DW zener diode triode V bias is not more than 6.8 V, triode protection. The RP is early in the morning or in the evening the brightness of the switch selection component.

Waterproof touch switch process: stamping, injection molding, assembling - cleaning - - molding - inspection, its color is a single, because of the waterproof touch switch has a high requirement on the production environment, so the use level of dust, the higher the workshop production for the product quality is guaranteed. In addition, the waterproof touch switch costs and prices are relatively low, generally do not big price adjustment due to the raw material market fluctuations.

There is a switch with waterproof touch switch, called a membrane switch, touch it with waterproof switches membrane switch is a kind of belt itself is the difference between a line of button, the top is usually composed of PET or PC and so on material the panel with the text or pattern, the lower is conductive lines, the middle layer is a form of analog switch and isolation effect of the double-sided adhesive made from PET material, the bottom part of the contact and connection lines are usually PET material. Membrane switch with convenient and flexible, can be customized according to the different need different color, size and appearance.

The principle of waterproof touch switch is probably more than so much, these are only Gangyuan's small make up have some experience, for reference only, if there is any unclear, but oneself to study again. Gangyuan electronics is mainly to provide the production and sale of the waterproof touch switch, if necessary, can dial yzc@gangyuan.com.cn consultation on its own.