The role of the multi-way switch:
Multiplexers are divided into 4 to 1 data selector, 8 to 1 data selector, 16 to 1 data selector, etc. The multi-way switch also includes the multi-way selection of the bus, the multi-way selection of the analog signal, etc., and the corresponding devices also have different characteristics and usage methods.
A multi-way switch is a plug-in component of a circuit. Used to switch bands or select different circuits. According to the specifications, it can be divided into the number of knives, the number of bits and the number of layers of insulating sheets; according to the structure, it can be divided into toggle type, rotary type, push key type, piano key type, etc.
The band switch should actually be called a multi-knife multi-throw switch, because it can not only be used as a band switch, but also for other purposes. As for how many knives (that is, how many sets of contacts) are needed, it depends on the needs of the circuit. Of course, at least two or more groups can be called band switches. As for how many throws (that is, how many gears) are needed, it also depends on your needs. From 2 gears to more than 8 gears. If it is only used as a band switch, a minimum of 4 sets of contacts and a maximum of 6 sets of contacts are sufficient. The gears are as many bands as there are, and as many gears are needed, at least 2 gears. There are also various types of "band switches", the common ones are rotary, push-pull, and button (key) type. The size is also large and small.
Classification of multi-way switches:
According to the operation mode, it can be divided into: rotary type, toggle type and lever type, and the rotary switch is usually used more. Each contact piece of the band switch is fixed on the insulating substrate. The insulating substrate is usually composed of three materials: high-frequency porcelain, which is mainly suitable for high-frequency and ultra-high-frequency circuits, because its high-frequency loss is small, but the price is high; epoxy glass cloth glue board is suitable for high-frequency circuits and ultra-high-frequency circuits. General circuit, its price is moderate, and it is widely used in ordinary radios and tape recorders; paper rubber sheet, its high-frequency performance and insulation performance are not as good as the above two, but the price is low, and it is widely used in popular radios, tape recorders and instruments. many.
