In this paper , we develop a campus LED bulletin board remote control system based on ARM devices using touch screen technology and Zig-Bee wireless transmission technology for the control of traditional single LED display.
0 Preface
In recent years, LED electronic display has attracted more and more attention as a high-tech product. It can display or loop text, graphics and image information in real time. It has many advantages such as rich display mode, strong viewing ability, convenient display content modification, high brightness, stable display and long life. It is widely used in many fields. With the continuous development of the LED display industry, people have higher and higher control requirements for LED displays, especially for remote control of LED displays. The control of traditional single LED displays has been difficult to meet the requirements of multiple LED displays. Application.
At present, the use of LED bulletin boards on campus is increasing, and it is used for the promotion and dissemination of various notifications. However, the control is still dominated by a single LED bulletin board. It is very inconvenient to operate and update the display information. In this context, this design researches and improves the current LED bulletin board system on campus, adds ZigBee transceiver module to the original LED bulletin board, and designs an ARM-based device using touch screen technology and ZigBee wireless. Campus LED bulletin board system for transmission technology.
1 control system hardware design
1.1 S3C2440 Processor Main Control Board Module
The Linux real-time operating system is embedded on this hardware platform to manage and control the entire LED bulletin board system on campus. The S3C2440 chip supports a touch screen interface that includes a touch screen controller, four external transistors, and an external voltage source. The touch screen interface controls the selection control signals (nYPON, YMON, nXPON, XMON) and analog pins to be connected to the pins of the touch screen panel and external transistors.
1.2 PS2 keyboard module
The PS2 keyboard transfer protocol uses the following data formats for data transfer: 1 start bit (always logic 0), 8 data bits (lower bit first), 1 parity bit (odd parity), 1 Stop bits (always logic 1), 1 acknowledge bit (used only in host-to-device communication). The timing of the keyboard transmission is shown in Figure 2.
1.3 LCD module
A 7-inch LCD screen is used, its video color system: PAL/NTSC; high definition, wide viewing angle, 16:9 and 4:3 can be converted freely; optimal resolution: 800 & TImes; 480; contrast: 200:1; The 7-inch LCD screen is mainly used for the display of the main control interface and the display of updated text for input.
What is Gardening Grow LED Lights?
The name itself symbolizes that these are artificial lights which are especially designed for uninterrupted growth and nurturing of the plants in the absence or scarcity of sunlight.
These lights either produce full spectrum light as in sunlight,or produce a particular range of light,suited to their market-for starting seeds, indoor plants and greenhouses, flowering and vegetative plants, or for all phases of plant's life.
Why this light so important to your plants?
Plants need sunlight to carry out a process known as photosynthesis-the process of conversion of carbon-dioxide into compounds, by utilizing the energy for sunlight. In the absence or in the scarcity of light, plants can't synthesize their food, and can't flourish as desired.
Let us now quickly understand about the colors which make up the sunlight. The sunlight is made up various colors which have its own wavelength. For example, the wavelength of blue light lies in the range of 490-450 nm while the red-orange range has the wavelength of 700-570 nm.
Full Spectrum Dual-Chip 1800W Led Grow Lights for Gardenging,gardening grow lights
Item Display
Key Features
Plug with listed certificate safe to use.
Application
1,Suitable for the plant-breeding house, garden, farm, horticultural park etc, which need the sufficient light
2,Greenhouse / Plant factory Lighting
3,Seeding /Seedling / Growing Stem/ Blooming/ Fruiting/ Breeding Lighting
4,Farm show/ Garden show/ Flower Exhibition Lighting
5,Garden/Bonsai.
Our Quality Control systems and after-sales
Package
User manual:
1>Indoor and green house use only
2>Do not touch the surface when the power is on
3>Do not use it at the place where the water is dripping
4>Blue is good for vegetative and red is good for flowering and budding, customer can choose the ratio of the red and blue, which has wonderful efficacy for the plants
Advantages for led grow light
1. Bring You High Yield
The traditional grow lights, such as HID and HPS can just bring you 0.5 -0.8 gram per watt, no more than 1 gram. But the Led Grow Light can bring you 1-2.5 gram per watt. It's amazing! LEDs in greenhouses deliver same yield as grow lights, using just 25% of the energy. So as for the energy conservation and environmental protection light source, the planters will consider the led Grow Light as their first choice.
2. Less Heat
While most grow lights are very warm, as HID, so you would need use the fan to solve this problem in summer. LED Grow Lights are generally moderate in temperature, and they will not harm a person if he touches them. As such, it is much safer and convenient for owners and their crops, they can be placed very close to the plants to deliver high intensity lights to the surface of the leaves.
3. Low Cost On Everything
Less electricity, save about 60% than HID.
Low amounts of heat, means less money spent on the room's costs of cooling.
Long life-span, no need to replace the bulbs.
No ballast.
No reflector.
Trade Terms
Payment: T/T, L/C, Paypal, 30% deposits before production,70% balance to be paid before deliverying(Western Union are welcome)
Sample will be delivered within 7 working days.
Discounts are offered based on order quanlityes.
MOQ:sample order are acceptable
Delivery ways:DHL,UPS,FedEx,TNT, door to door,by sea,by air,etc.
Philion is a company that makes it possible to produce fresh vegetables:
Where it is too hot or too cold,
Where there is too much or too little sunlight,
We create in a complete closed indoor environment the optimal conditions to grow.
Horticultural LED Lights,Led Plant Light,Horticultural Grow Light,Led Grow Lighting
Shenzhen Phlizon Technology Co.,Ltd. , https://www.philizon.com