systems - solar street lighting system1
Since the first development of electronic and mechanical systems, the development of new materials, new technologies and processes has been rapid and revolutionary.
Scientists, designers and engineers are committed to inventing and improving systems that affect life.
When designing an electronic or mechanical system, it is important to understand what a product can do --
This will be "output ".
Systems are usually designed using a system structure diagram that takes into account the "input, processing, and output" of the system.
How the system will work is a "process" and "input" is the part of the system that makes the process start to happen.
The selection of components to be used in the production of electronic and mechanical products is complex and should be carefully selected to ensure that the product works properly.
Depending on the function that the product needs to implement, there is a range of different sensors, controls, and output devices that can be used together or separately.
These components are divided into three categories: the input processor. Some examples include the input sensor function.
Related resistance (LDR)
The resistance changes as the level of light changes, and the change in resistance can be used as an input solar garden light and street light. The resistance changes as the temperature changes, and the change in resistance can be used as an input refrigerator, central heating system, and freezer to maintain the temperature. Electrical sensors can convert mechanical movement or force into electrical energy
It can generate electrical impulses from pressure, such as by tapping a lighter and a microphone (
The pressure generated by sound waves makes electrical impulses)
The Process control device functionuswitcha switch can allow or prevent power from flowing around the circuit any device that needs to be turned on and off to limit current flow
They are manufactured to limit current to varying degrees (resistance)
All electrical products
It helps to control the flow of current and protects precision components from being overprogrammed. Programmable components are chips that can be programmed to make decisions based on input-based most modern electrical products
The washing machine is programmed to work when the drum door is closed and the on/off button is pressed. The output device function the speaker uses a pulse current to move the vibration to produce the magnet for the sound speaker, the headset and the radio motor convert the power into a rotational motion, which can connect the spindle to the gear or wheel, make it power and motivation-LEDs (LED)A long-lasting, low-
Power lighting, lamps and power indicators when trying to design products that attract the target market, it is important to display the appearance of electrical or mechanical products.
Components need to be installed in a protective, practical, safe and aesthetically pleasing coating to be both available and attractive.
For example, products made of light aluminum, such as mobile phones, can be anodized to bond insulation, coloring, and protective layers.
This improves the aesthetics and functionality of metal products by giving metal-
Covering that looks any color, protecting the metal housing from scratches, wear and corrosion.
Fashion and trends have a great impact on the sales volume of mechanical and electrical products.
With the development of products with new features, people want the latest models.
This may increase the amount of waste that needs to be safely disposed.
Some metal parts can be safely recycled and reused, but other parts such as batteries are difficult to handle safely.
Protective insulators (such as plastic) are usually used to protect users from the influence of current and to prevent the risk of electric shock in larger products such as televisions or refrigerators.
The plastic housing of the product can be manufactured by vacuum forming around the internal product to ensure that it is covered, protected and beautiful.
The cost and availability of many components vary greatly;
The cost per unit is always much higher than the cost of bulk purchases.
Components are usually manufactured in large foreign factories, making the transportation of a small number of components expensive and slow.
Therefore, most electronic components are produced and packaged in large quantities.
Specialized equipment may be required to produce electronic and mechanical components, making it expensive to produce parts.
When sold to consumers as a single item, the cost of the component is also high, because a large box of components must be opened and can be kept "in stock" for a period of time before all components are sold in the box.
The following example is the cost calculation table for the resistance pack: quantitycost10 1. 0020£1. 40100£3.
00 from the table above, you can calculate the cheapest option if you need 40 resistors.
If you buy 10 packs, you need 4 packs.
40x10 = 44x100 = 4.
If you buy 20 packs, you need two.
40 ÷ 20 = 22 × 140 = 2.
80 Although 100 of the package seems to be the cheapest cost per unit, the fixed price of the package is 3. 00.
So the cheapest option is two packs of 20 resistors.
The following problem is a cost calculation table for a set of beeps: quantitycost10£6. 00100£55.
00 what is the difference in price when buying a buzzer from either package?
5,500 per 100 = 55 p per spread = 60-