The touch control screen is not any fresh thing, present electronic product basically all have a colored liquid crystal greatly, add a touch type touch control screen. It is very convenient to use, can totally replace that kind of fixed key set in the past. Introduced the driving circuit of a kind of touch control screen as follows, I just worked
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out this small board an hour ago too, will publish this daily record at once after succeeding in test, fresh and hot! First of all, introduce the structures of the following contact control screens, it was cohered together by a contact control screen and a liquid crystal display screen. Liquid crystal display screen according to color, material, last way classification, various in style, does not introduce to the liquid crystal screen in detail here, that used is the display screen of dot matrix of 16Bit semitransparent reflecting type TFT liquid crystal in this text picture. And touch the screen and is mainly divided into two big classes, including capacitive and resistance type. The capacitive touch control screen carries on the work by the induction by current of the human body, the advantage is to have long performance life, does not need to exert oneself while touching, the faceplate is hard and wear-resisting; The shortcoming is to touch the precision low, it is touching activated to use the particular medium such as the human skin, Exerted a tremendous influence by the temperature humidity, there is the external world relatively at the time of the electric field of high-intensity magnetic fields, the touch control screen will not work, to put it briefly anti-interference is discrepancy. The resistance type touch control screen makes use of resistance quantity of the axis of ordinates and abscissa axis while pressing...
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The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
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The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
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This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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