Portable Power Station for Camping in-depth Demand Report

Two story brick traditional with 4 bedrooms, simply.5 baths, island kitchen, and large deck! Problem? We often talk about houses with regard to room count, along with a list of finishes, such as tile floors, granite counters, or faux paint. Even if this vocabulary conveys certain facts, it does not provide resources to look into how to re-design several things in a very way. And, your computer. The computer and monitor use around 180 watts when effectively on. Computers are certified by Energy Saver, consequently they have to have the same energy to be turned on as in their solar LED light regular benefit from. So, if you aren't using it your computer turn it off). Be particular keep your lawn mowed, your sidewalks and drive edged, and the weeds low. Garden beds should be pruned, weeded, and new flowers and plants in order to be added as required. Mulch should also be added regularly to protect the garden as well as recover the solar street light full color. If bricks or stones line the gardens consider washing them or resetting any that may have been moved thanks to erosion or weather conditions. In most locations will be the major about 4 hours of peak sunlight per day when your solar panel will be operating at peak efficiency. But your panels will operate 24 hours per day using all forms uv sterilization lamp of light including the stars, street lights, and heavy cloud terms and conditions. As a throughout the year average we reduce the performance of their solar panel by 10-15% of its maximum wattage rating. The respond to that question depends on how well the batteries are charged. A few factors however affect how long your lights will stick to are items like how much sunlight does your region receive, where did putting the table that collects the sunlight, if it is in direct sunlight, then it should charge the batteries that power lights no problem. Focus first on where burglars gain entry. Most burglars come through panels. If you can only do some lighting, compared to make your whole property secure, do it here. Light by the doorway, even weak light, is better than nothing by far. Once you have it done it happens to be time take it easy and enjoying your family & friends while they like the beautiful 'Go Green' environment surroundings that you created so quickly. Enjoy and enjoyable.

Part 5 of this series will focus on 'real' application, so far we have to learn the skills and experience will be used, help us easier to stabilize a complex circuit. We will design a general single power buffer amplifier ( 2. Buffer 1 v to 4. 1 v reference) 5 v single power supply linear to enable it to work, can provide larger output current ( 》13mA) And in - 40 ° C to + 125 ° C temperature range of drift is 0. 4V。 Although the circuit can be used in many applications, but we will briefly introduce to give the reason of this design, and explain why no ready-made circuit can be used to complete the work. We adopt integrated technology to develop the network device here, in order to provide a proof is good for many operational application the stability of the circuit.
technical background:
in practical application, a common application of wheatstone bridge is pressure measurement. As shown in figure 5. 1, with the added pressure change, a lot of the pressure sensor has obvious of second order nonlinear characteristics.



in figure 5. 1 typical sensor output than the actual stress figure word (
Up, down) : bridge output at room temperature and pressure relationship, ideal sensor, the actual sensor;
axes words: X: pressure, Y axis: Vexc bridge output (= 1 v Or Vbridge V/V)
in addition to changing with the added pressure caused by nonlinear, many pressure sensor with temperature changes in the offset and scope has nonlinear characteristics. Used to school
is the error of a modern solution is built-in electronic circuit in the pressure sensor, and the electronic circuit and pressure sensor as a module,
as the change of temperature for digital calibration. A kind of suitable for such purpose IC is Burr - provided by Texas instruments Brown PGA309 ( Such as
in figure 5. 2) 。 The output voltage is through digital calibration of the sensor and the signal adjustment consists of IC an analog sensor linear circuit, the circuit will be part of the output voltage feedback
to sensor voltage pin, which part to improve the proportion of second order nonlinear linearization. Therefore,
VEXC pins will be along with the change of sensor and a pressure to adjust the voltage. This is a limitation of the sensor circuit incentive pin VEXC, within the scope of work
as temperature limit in 5 ma on the maximum output current. Here we ran into a dilemma, namely how to incentive for current in an impedance sensor
more than 5 ma.



in figure 5. 2: modern digital calibration sensor signal conditioner
figure word ( The left and right sides, top and bottom) Telex: nonlinear type sensor, linear circuit, reference, analog sensor linear circuit, linear DAC, fault monitor, automatic zero PGIA, over/owed scale limiter, analog signal adjusting circuit, external temperature, digital temperature compensation, temperature, internal temperature ADC, control register interface circuit, and linear Vout, digital computing.
design requirements:
in figure 5. Three main design index is given in detail. We want to use a tolerance of 10% 5 v power supply to the power supply. We need a unity gain buffer, because we don't want to introduce any error in the PGA309 linearization loop. Because PGA309 on VEXC pin has a very wide range of programmable, so we need to accommodate from 2. 1 v to 4. 1 v voltage range. Our youngest sensor resistance of 300 Ω. Therefore, for maximum 4. 1 v output voltage, we need to provide at least 13. 6 ma of current. PGA309 linearizer is about 35 kHz bandwidth. As a result of the closed loop way, our buffer bandwidth must be at least equal to or greater than the linear loop bandwidth. We will aim at 100 KHZ small signal loop bandwidth. For the sensor application which we are interested in, the large signal response when we have 1 v/u s swing speed is enough. In from the design 40 ° C to + 125 ° C temperature range should be stable work. Because we don't want to in the final application due to the reason of the buffer circuit in introducing any extra error, so we need a in the op-amp input common-mode range will not have any crossover distortion of the circuit. We will briefly discuss the question, because it is almost all CMOS single input power rail to rail ( RRI) Op-amp is a problem.

If power inverter loss greater than 3%, it is necessary to check whether the inverter conversion efficiency is satisfies the requirement of equipment performance.

What are the basic power supply systems? u003cbru003e u003cbru003eThe basic power supply system used in construction engineering power supply includes three-phase three-wire system, three-phase four-wire system, etc., but the connotation of these terms is not very strict. The International Electrotechnical Commission (IEC) has made uniform regulations on this, which are called TT system, TN system and IT system. Among them, the TN system can be divided into three categories according to the different ways of connecting the exposed conductive parts of the electrical equipment to the system: namely TN-C system, TN-S system, TN-CS system. u003cbru003e IT system: The neutral point of the power transformer is not grounded (or grounded through high impedance), and the electrical equipment housing uses protective grounding. u003cbru003e TT system: The neutral point of the power transformer is grounded, and the enclosure of electrical equipment is grounded. u003cbru003e TN system: It is called protection connection zero. When the fault makes the metal shell of the electrical equipment live, the phase line and the neutral line are short-circuited, the loop resistance is small, the current is large, and the fuse can be quickly blown or the protection device can act to cut off the power supply. u003cbru003eWhat is the scope of application of different power supply systems? u003cbru003e When the power supply distance of the IT system is not very long, the reliability and safety of the power supply are high, and it is generally used in places where power outages are not allowed, or places that require strict continuous power supply, such as electric power steelmaking, large hospitals Operating room, underground mine, etc. u003cbru003e TT system does not rely on equipotential bonding to eliminate electrical accidents caused by fault voltage conducted by PE wires elsewhere, so TT system is mainly used in some outdoor installations that are difficult to equipotential bonding, such as street lamp installations, agricultural electricity Wait for the occasion. u003cbru003e u003cbru003e TN-C system: 1. General industrial plants and places where the three-phase load is relatively balanced, the third harmonic current in the circuit is not large, and there are professional maintenance and management. 2. It is not suitable for electronic equipment sensitive to low pressure and explosive dangerous environment. u003cbru003e u003cbru003e TN-C-S system: is a widely used power distribution system, suitable for industrial and civil buildings. u003cbru003e u003cbru003e u003cbru003e TN-S system: 1. Places where single-phase loads are concentrated 2. Places that require explosion protection. 3. Places without precision electronics and data processing equipment. 4. Places with many third harmonic current equipment. u003cbru003e u003cbru003eWhich power supply system is more advantageous for landscape lights? u003cbru003e u003cbru003e u003cbru003e Now that there are more and more landscape lighting projects, the safety of electricity consumption cannot be ignored. According to the third point of Article 10.9.3 of the 'Civil Building Electrical Design Code JGJ 16-2008': 'The indoor landscape lighting should be in line with the building The grounding pattern of the power distribution system is the same. The facilities installed within 20m from the exterior wall of the building in the outdoor landscape lighting should be consistent with the grounding form of the indoor system, and the TT grounding form should be adopted for those more than 20m from the exterior wall of the building.' u003cbru003e u003cbru003e It is understood that the TT system is basically adopted for street lamps, and each lamp has an independent ground. The distance between landscape lighting and buildings is basically greater than 20m. It is not realistic to use single lamp grounding. Now most landscape lighting grounding systems use TN-C-S systems. Is the TN-C-S system suitable? The following analysis is for your discussion. u003cbru003e u003cbru003e u003cbru003e Outdoor landscape lighting is generally far away from the substation. The power supply is generally led by the TN-C system (four-wire). The PEN line is repeatedly grounded in the distribution box. If the PE line is drawn out for protection, the power supply system is It becomes a TN-CS system, and sometimes the drawing review fails. The landscape lamp adopts the TT system. It is unrealistic for each lamp to have an independent grounding pole. Only the grounding bus bar is used to connect the grounding of all lamps together. The simplest way to connect the grounding busbar is to use a five-core cable and PE wire as the ground connection line. It can be seen here that the biggest difference between the TT system and the TN-C-S system is whether the ground wire is repeatedly grounded with the power supply line, followed by the difference in ground resistance. u003cbru003e u003cbru003eConclusion u003cbru003e u003cbru003e Regardless of whether the TN-CS system or the TT system is used, a leakage protection switch should be installed in the front of the power supply circuit. When the lamp leakage occurs, the reliable grounding of the lamp can avoid personal injury. At the same time, the leakage protection switch acts to quickly cut off the power supply. , Protecting personal safety. Therefore, good grounding and leakage protection are essential safety measures for landscape lighting.

The special LED explosion-proof ceiling lamp for coal mines is sold directly. Today I will introduce this LED explosion-proof ceiling lamp BTC, which is a new type of LED explosion-proof lamp independently developed by lighting factory lighting. It adopts high-power integrated module design, high luminous efficiency, and low heat ,Energy saving and environmental protection. Power supply AC-V life hours, light source life hours, luminous attenuation is less than three thousandths, service life> annual power: -W　　light efficiency ≥Lm/W 　　lamp efficiency>% 　　 color rendering index-　　 protection grade IP 　　 warm white-K, white -K　　Size: Diameter MM has strong applicability. The explosion-proof LED floodlight adopts a unique power supply method and has strong applicability. It can work normally between AC and VV without any change in brightness. It has the advantages of strong explosion-proof, strong shock and vibration resistance, good heat and humidity resistance and good sealing performance. The service life is more than one year, in line with the new national standards, energy saving, low carbon and environmental protection. Compared with incandescent lamps, it saves about% of electricity, and saves about% of electricity compared with the energy-saving lamps that are often used at present.