1. Voltage regulator is introduced. The commonly used voltage stabilizers on the main board are 1117 1084U 1085U 1086N 1087U EH11A3804 L1284N RT9164 and so on. The 1117 regulator (see figure 1) is the Low DropOut regulator, LDO, on the mot…

1. Introduction of crystal oscillator. The function of crystal oscillator is to produce the original clock frequency. The crystal oscillator frequency is doubled by the frequency generator and becomes a variety of clock frequencies in the …

1.Characteristics of panel shape, measuring range and polarity of watch pen. Digital multimeter has the advantages of small volume, high precision, visual display, moderate price and so on. It has been widely used in electrical and electro…

This article briefly introduces the processing methods of adverse contact phenomenon during using pointer multimeters. The typical feature of the malfunction between the plug and the socket of the test line is that the pointer of the multi…

1. A method for detecting diodes. The range switch of the digital multimeter is set to the position marked with the diode symbol, and the red meter pen is changed to insert "V.Ω "socket is then connected to both ends of the diode using two…

First, fault judgment method Before repairing, a new battery is put into the meter. The multimeter is placed in the Rx × 1n R × 10 R × 100 or R × 1k block, and the two tables are briefly connected to see if the needle has any indication. I…

Smart phone is a modern mobile communication device with independent operating system, which can access wireless network through mobile communication network or other means, and can install a variety of applications provided by third parti…

Smart phone is a modern mobile communication device with independent operating system, which can access wireless network through mobile communication network or other means, and can install a variety of applications provided by third parti…

When multimeter is used to measure circuit parameters such as resistor, voltage, current and so on, the error will be caused not only by the low accuracy grade of multimeter, but also by the measurement method, operating environment and ot…

1.Inductor Introduction. Inductor (inductor coil) is a kind of electromagnetic induction element, which is made of insulated wire (such as enamelled wire, yarn wrapped wire, etc.). It is a kind of energy storage device in magnetic field, a…

First, the characteristics of detecting DC current with an pointer multimeter. When the DC current is detected by using the pointer multimeter, the voltage of the multimeter will reduce the equivalent voltage of the circuit because the two…

For the limited measuring precision of the pointer multimeter, the detection error is related to the parameters, detection methods and operating conditions of the pointer multimeter, especially the parameters, sensitivity and voltage of th…

Surface Acoustic Wave Filter (SAWF) is an integrated filter which uses the principle of "piezoelectricity" and "anti piezoelectric" to transmit signals. The ability of different frequency signals to transfer energy in SAWF is different, th…

Capacitors are widely used in various circuits. To detect the capacitance of a capacitor, a capacitance meter should be used. Nowadays, a digital capacitance meter is widely used that is a digital meter dedicated to measuring capacitance. …

A solder material is a fusible metal or metal alloy used to join a metal to be soldered during soldering. Its melting point is lower than that of the metal to be welded, and it is easy to form an alloy with the surface of the metal to be w…

The universal bridge is an instrument made by the principle of bridge circuit balance. It is divided into three types: DC bridge, AC bridge and AC and DC bridge. It can be used to measure resistance value, capacitance, inductance, quality …

1.Internal heat type soldering iron The iron head of the internal heat type soldering iron is inserted on the iron core, which has the characteristics of fast heat generation and high efficiency. According to different power, it can be use…

1) Measuring resistance: The transfer switch is set to R × 1 ~ R × 10kΩ gear. 2) Measure AC voltage: switch switch to 10-1000V gear 3) Measuring DC voltage: The transfer switch is set to 0.25-1000V gear. If the high voltage is measured, in…

Connect the measured resistor Rx to the binding post, first estimate the size of the measured resistance, place the measurement selection switch and the range switch in the appropriate position, and place the toggle switch in "inner 1 kHz"…

Gas-fired heat gun (also known as self-heating iron) is one of the best tools for disassembling multi-pin components. It uses the heat generated by the combustion of butane gas to heat the soldering iron for welding. In addition, it can al…

Flux, is used to remove oxide film on the metal surface, increase wetting, accelerate the soldering process, and improve soldering quality. 1. The type of flux. According to the different characteristics of the flux, the flux is divided in…

1. The transfer switch cannot be rotated when the positive and negative test leads are docked or measured, so as to avoid the needle swiftly swinging when the hFE gear is rotated.Which may cause the needle bent, and the multimeter may be b…

Before using the new soldering iron, the multimeter should measure the resistance at both ends of the power line. If the resistance is zero, the internal contact line should be disassembled, disconnect the line and plug in the power supply…

1. The meter has no display. First check if the battery voltage is normal (usually a 9V battery, the new one should also be measured). Next, check if the fuse is normal. If it is not normal, replace it. Check if the voltage regulator block…

Connect the measured inductor Lx to the “tested” end, place the toggle switch in the “inside 1 kHz” position, and place the measurement selector switch in the “L” position. Estimate the size of the inductor and select the appropriate range…

The solder sucker is the ideal tool for removing multi-pin components and through hole weldment, as shown in Figure 1. Figure 1 outline of the solder sucker 1.Structure and working principle. The solder sucker consists of a soldering tin, …

There are many models of mechanical multimeters, and there are differences in functions between different models. When purchasing a multimeter, it is usually necessary to pay attention to the following aspects. 1. When used to repair weak …

EP4SGX230HF35C4 Since its establishment in 2011, ALLICDATA ELECTRONICS LIMITED has been committed to the sale of electronic components. Our company has a large number of spot and diversified purchase channels. Now, with the long-term coope…

The ordinary mechanical multimeter is composed of a meter head (magnetic type), a gear shift switch, a mechanical zero adjustment device, a potentiometer, a test lead, a socket, and the like. According to the form of rotary switch, it can …

Q1: Where can I order EP4SGX180FF35C3N IC FPGA 564 I/O 1152FBGA? A: You can purchase orders directly online at our website: Open our home page >Quick search EP4SGX180FF35C3N > click Buy on Produce page > Finish all the step shows Or send y…