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 …