top rated ipods

First, to understand their own charging treasureThere are generally several data on the charging treasure: battery capacity Capacity (mAh), input current (a), output current (a), input voltage (v), Output voltage (v)The power of the rechargeable battery is mah (mah), which is the product of the current intensity and time, and when the current intensity is in mah (MA) units, the time is measured in hours (h), and the two are multiplied by mah (mah). It represents the time of full discharge under

Power nameplate identification, we can generally determine whether a power supply is not a good power, or in the end suitable for our own platform to use. ▲ The nameplate displayed above a certain power supply Maximum power is peak, rated power is important Rated power, for a power source is very important, only we clearly see the "Rated power" in

First write this week's simulation job. Simulation results: After starting about 3.9 to 4.2 seconds speed will be stable, stable value around 1213r/min (can not reach 1220r/min, because there will always be 0.6 ohm resistance exists), and the upward curve only a few waves.Simulation Requirements: Motor start simulation requirements combined with the study of the DC motor mechanical characteristics, with modelica design and simulation of a DC motor string resistance Start-up process, the motor wo

= objBook. Worksheets;ObjSheet = (Excel. _ Worksheet) objSheets. get_Item (1 );// Set the table nameObjSheet. Name = DateTime. Now. ToString ("yyyy-MM-dd") + "motor factory test record table ";# Region write data// Store the data read from the databaseSystem. Data. DataTable excelDataTabel;// Read standard parametersDataAcc. selectString = "SELECT motor model, rated torque, rated voltage,

VF; silicon rectification tube, silicon stack under the specified conditions of use, maximum operating current (average value) that can pass continuously in the sine half wave, maximum forward DC current that can pass through the silicon switching diode at rated power, and the current given when measuring the forward electrical parameters of the Voltage Regulator Diode If (AV) --- forward average current IFM (IM) --- forward peak current (forward max

SMD capacitors can be used in the circuitLong-term stable and reliable operation, the maximum DC voltage, also known as SMD Capacitor Voltage. For devices with the same structure, medium, and capacity, the higher the voltage, the larger the volume.The rated voltage is less than 50 V..The product with a nominal rated voltage greater than V is definedMedium and high voltage SMD Capacitor. Medium and high volt

3C Certification Of all the power supply, only one power supply has not passed the 3C certification, of course, you can not buy in the market, because the power supply in our market, must pass the 3C certification, the power is not certified the application, waiting for certification a hand, it could be put on the market. This means that in the 3C certification is about to be one year old, the market implementation of the intensity is still very large. So this is not a standard for you to selec

modulation (impulse amplitude modulation) abbreviation, is to change the pulse amplitude according to certain law, in order to adjust the output value and waveform of a modulation mode. the voltage type is different from the current type. The main circuit of the inverter can be broadly divided into two types: the voltage is the DC conversion of the voltage source to AC inverter, the DC circuit filter is the capacitance, the current type is the DC conversion of the current source to AC converte

-ion batteries. ;　; In the memory of the Coulomb counting chip, there is usually a basic battery information ▲ the initial capacity of the battery (mAh), that is, the rated capacity, after a fully charged battery The resulting capacity ▲ the current capacity of the battery (mAh), in use is the battery capacity Current current flowing through (MA), i.e. the current loss of the cell phone Coulomb Counting Simple Application But the average phone does no

token bucket algorithm (token bucket algorithm) When implementing a QoS policy, the user's data can be limited to a specific bandwidth, and when the user's traffic exceeds the rated bandwidth, the excess bandwidth is handled in other ways. To measure whether the traffic exceeds the rated bandwidth, network equipment is not a simple digital plus subtraction to determine, that is, such as the bandwidth of 10

Connection Addresshttp://www.samirchen.com/ios-avaudiosession-3/The Avaudiosession class is introduced by the Avfoundation framework. Each iOS app has an audio session. This session can be accessed by the Sharedinstance class method of the Avaudiosession class, as followsOnce you have an instance of the Avaudiosession class, you can choose from the different categories available to your iOS app by invoking the Setcategory:error: instance method of the audio session object. The following is a lis

inductance will produce a noise, which may be caused by the inductance of the current is too large, the improvement method, the input increases the power-up slow circuit, the output reduces inductance value. This slow-up circuit can be built using RC. t = 2.2 RC.2) in the DCDC circuit, should not be a simple focus on the output voltage section, but also to ensure that the input voltage in the power-up process can not be too slow, nor too fast.3) in the design of the power supply to determine th

total inductance increases rapidly, so the common mode signal presents a great inductance, making it difficult to pass, it is called common mode choke. Its two coils are wound on a low-loss, high-permeability ferrite ring, where the magnetic field on the two coils strengthens each other when the current is passed. The inductance of L is related to the rated current I of EMI filter, see table 1.

example, if the element will be used in the tire pressure monitoring system, it is important to have the inductance stability within a wide temperature range, and this requirement will determine the choice of the core ." Rated current When selecting an inductor, the operating current should be lower than the rated current in the manual. If the current exceeds the r