Improvement of "Manual Programming of 89C2051"

1The application of thermal ceramic heating element in the automobile â–¡ Sun North positive temperature coefficient heating element, has the advantages of no open flame heating, fast self-control and constant temperature life. The constant temperature electric iron is the typical one, and the original meaning is introduced. The heating element is used as a ceramic heater for low temperature start-up of the vehicle in the automotive oil circuit. There is a branch type flat disc type and a ring type structure. Its co-question feature is that the thermal efficiency island is small in size and simple in structure. 1 is fixed on the wall of the gasification chamber to heat the gasification chamber. The temperature is rapidly increased to increase the gasification efficiency of the fuel. This will not only help the car start at low temperature, but also reduce waste 1 pollution. It will also reduce fuel consumption. Because the factory thermistor has a self-controlled constant temperature heating characteristics. Therefore, it is very suitable for the car with changing working environment. 1 The performance parameters of the low temperature starter ceramic heater are as follows. The kit is available for the above products. Luoyang Xialin Electronic Appliance Factory has long been available for each model. With the installation position of the manual, the big car uses 68 yuan each, and the car uses 55 yuan each. More discounts in bulk. Zip code 471003; telephone transmission of the manual editing of 82, 51 in the single-chip field 0, in the text, there is a mistake in the design circuit that automatically switches the programming voltage according to the programming mode. The original circuit 9013 is the driver of the servant. When the level is high, the voltage on the emitter of the D1 can only be 5 or so. According to the original design circuit, only the 3 feet of 89, 2051 are always getting 12 voltages. If the circuit assembly is designed according to the original text, it is practically impossible to erase or write the program memory in the 20.51.

The correct design is attached here. The part inside the dotted line box. In place of the original Ding 1 part of this hole hand programming dream improvement when the sink 4 is high level, the middle 9012 can be fully turned on, the ruler 3 can only get 12 voltage, to achieve the erase or write function.

Making a talk about 8 terminals □ Su Chengfu more and more large screen color TV has a 5 door, commonly known as 3 terminal 3 terminal 3 is the English 3 叩 prefix, translated as 邝 grade, in other words. It refers to the interface of high-definition video signals; most of the ordinary color TVs have terminals, which are used for directly receiving the processed video signals for the color TV playback image, and the video terminal status of the input color TV is switched by the input and output. The chrominance circuit and the brightness circuit are divided, processed, and then sent to the matrix circuit to form a primary color video signal by decoding. Finally, the 8-channel video amplification output is used to modulate the primary color electron beam of the picture tube to reproduce the color image. The video signal of the VCR is transmitted through the above complicated transmission, and the distortion is very large, and only the resolution of about 2,0300 lines can be obtained.

The video signal transmitted by the 8-terminal can eliminate the mixed coding synthesis of the medium luminance signal and the chrominance signal and the input switching in the television. The steps of matrix decoding and the like greatly reduce the signal distortion during transmission. The method adopted is to separate the luminance signal and the chrominance signal by the video signal through the comb filter, and separately process and output the respective ç–‹ circuits. Avoid crosstalk between signals and signals caused by the video signal interface. Maximize the purity of the signal = then send straight 3, such as the interface. Through the 3-terminal line, the 7 0 signal is input to the 5,1 of the large-screen color TV, and the interface is sent to the ç–‹ circuit to process the synthesized primary color video signal through the signal selection. Finally, only the 8 video amplification output is used to modulate the basic color electronic production of the picture tube.

Steel Drag Chain (Steel Cable Drag Chain), commonly used in machine tools machinery such as cable, tubing, the trachea, water pipe, air duct, traction and protection.Now the steel drag chain (Steel Cable Drag Chain) has been widely used in machine tools, to protect the cable also make machine overall looks more beautiful.

I.         TL series steel drag chains (TL series steel cable drag chains)

TL series drag chains are mainly consisting of chain plate (top quality stainless steel with chromium plated), supporing board (extruded aluminum alloy) and pinshaft (alloy), etc. There is no relative motion between the cables/ rubber hoses and the drag chains, giving no deforming or twists. The chromium plated chain board has very nice-looking appearance and has very rational construction and flexible and high strength. It is reliable and easy to operate, install, dismantal or assemble. It is worthwhile mentioning that the anti-wearing performance has been improved greatly due to wear resistant material and alloy pinshaft are used. The product is flexible to bending and has low resistance, giving low noises. It can be used for a very long period of time without any deformation or hanging down.

The product is nice-looking, which makes the machine tool unit nicer looking as a whole and makes the machine tools and machineries more competitive in the international market.

1.     The drag chain can adapt to max moving speed of 40m/sec.

2.     When at the max moving speed, the sound pressure of noises shall not be greater than 68 db.

3.     The service life of the drag chain shall not be less than 1 million times (reciprocating).

Drag chains with 3 chain board:

One or more drag chain boards can be installed on a wider drag chain, because the max length of the supporting board is 600mm-650mm. This arrangement can also improve the stability of the narrower chains. In this way, the conduit and the cables can be separated from one another by a third chain board.

Elastic status for hydraulic pipes:

Note that the pressure of a hydraulic pipe may extend or contract downward, so the elasticity should be taken into consideration, especially under high pressure or with long length.

II.       TLG series steel drag chains (TLG series steel  cable drag chains)

There are TLG separate type and TLG frame type.

The TLG type drag chains are suitable for installing a large quantity and heavy duty of cables and oil pipes which allow suspending installation (supporting is not allowed) and is lengthy. The supporting plate can be made according to the user`s requirements. It is suitable for machine tools and moving machines. Their bent radius ranges from 50-600mm and the chain`s height is from 35 to 150mm. Users can make a free selection of them.

The TLG type drag chain has a max travel range of 32 meters and is suitable for all kinds of transmissions. It can freely be made longer or shorter. In addition, the bend radius can be changed by changing the pinshaft.

The width of the supporting board is from 150mm to 600mm. The distance between the holes is 5mm.

The height of the supporting board depends on the max outside diameter of the cables. When the machine tool is working in the highest speed and if the max width of the drag chain is longer than 300mm with the chain`s length longer than 4m, one size larger than normal should be selected just out of consideration of safety.

The bend radius should be selected according to the max diameter of a cable and should be 10 times of the diameter of the cable used. The bend radius can be selected as 50-600mm according to the given table. Small radius should be selected for those ones with small travel range.

Drag chain length=1/2 travel range + 4 bend radius, this is only used for the fixed connection which is located at the middle point of the travel range.

The fexation of the drag chains can be done according to the location of the machine tools. The angle steel can be put in the outer or the inner, in other words, in the inner side of the chains or in the outer side. In common cases, it is in the inner side of the chains and face towards outside.

Main parameters & demensions for steel type drag chains (steel cable type drag chains)

Example for an order: Travel 11.2m, Bending radius 300mm, 3 Cable diameter 48, 3 Cable diameter 28, 2 Houses diameter 36

The TLG type aluminium alloy drag chains are different from the ordinary ones. The can made by using fixed aluminiu shape materials to meet the needs of the users. The width of the supporting board can be 12mm. When operating under high operating speed and high travel speed, the drag chains can be separated from one another so as to ensure the cables being protected in a very safe condition.

TLG aluminum alloy type is the only solution to the larger size chains. The supporting boards can be made according to the requirements of the users. Thanks to the strong construction, the width of the supporting board can be 1200mm.

TLG plastic spacing straps can moved and adjusted in position freely. See figure for details. If cables in many different specifications, you may select this economic device. 

Steel Cable Drag Chain

Steel Cable Drag Chain,Stainless Steel Cable Drag Chain,Aluminium Steel Cable Drag Chain,Stainless Track Carrier Drag Chain, Stainless Carrier Drag Chain

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