开关的种类繁多，有些开关我们接触过，但叫不上名来，有的听到开关名字，又不知道用在什么地方，总之这个小小的电子元部件，确实在很多领域各尽其用，少不了它们的身影。今天我们说到的是拨码开关，也有人称它为拨动开关，数码开关，指拨开关，顾名思义，拨动开关是一款能用手拨动的微型的开关，采用的是0/1的二进制编码原理且型号很多，这种开关广泛应用于数据处理、遥控、通信和防盗自动警铃系统、风淋室、火车模型等需要手动程式编制的产品上。
这么多的用途，那么购买时如何挑选呢？
1.认准正规厂家品牌
确认自己选购的拨码开关为正规专业生产商制造，要具备齐全的厂家资质证明，用户口碑好，知名品牌更有保障。目前用量最广泛的是台湾生产的，大陆也有很多厂家优秀的生产厂家，推荐几个优秀的厂商供大家参考，百莹，圆达，星坤XKB，KE。
2.开关的外观，手感
品质好的开关采用的都是高品质的材质，从外观就可以感觉出来。购选时可以看外观，靠手感，高品质开关表面光滑，无气泡、无划痕、无污渍，摸起来有质感，且品牌标志清晰可见。
3.了解拨动开关使用的材质
所使用的材料在防水性、阻燃性、绝缘性、抗冲击性等方面是否出色，了解清楚面板、引脚等分别使用的材质，如目前拨动开关面板使用的材质有高级塑料不锈钢、铜等金属材质，选购时根据自己需求来选择。
4.生产厂家的技术实力，公司的人员配备以及管理能力。
生产厂家的技术实力，组装工艺以及公司上下管理人员的对工作严谨程度，质量意识，直接影响着产品的品质，在购选前有必要对厂家的生产工艺和人员配备进行一定得了解。
5.出厂检验以及售后服务
最后环节出厂检验方法是否开关内外做到全面质检，确保开关带有质量合格检验证书；咨询厂商购买后倘若开关出现问题是否可以及时得到售后客服的解答，是否提供技术服务，如此才能买得放心。
How to choose a high quality DIP Switch?（DIP Switch selection method）
What famous brands does? DIP switches have?
There are many types of switches,Some of the switches we've touched, but we don't know their name, some of them we have heard bit we don't know where to use them, anyway this little electronic component is really useful in a lot of different areas.Today we talk about the DIP switch and how to choose a high quality DIP switch.
A DIP switch is a manual electric switch that is packaged with others in a group in a standard dual in-line package (DIP). The term may refer to each individual switch, or to the unit as a whole. This type of switch is designed to be used on a printed circuit board along with other electronic components and is commonly used to customize the behavior of an electronic device for specific situations.
DIP switches are an alternative to jumper blocks. Their main advantages are that they are quicker to change and there are no parts to lose.
DIP switches are widely used in audio-visual products, digital products, communications products, security products, toys, computer products, fitness equipment,medical equipment and more.
Blow are some tips for choosing a DIP switch:
1.You should choose the products of regular manufacturers and do not purchase inferior products.
The manufacturer should have the complete manufacturer qualification certificate, make sure good reputation from users and trust that well-known brands have more ensurence.
Here i recommend some excellent manufacturer for everybody reference,BIWIN,XKB,KE.
2.The appearance of the switch and your hand feeling.
Good quality switches are made of high quality materials,you can feel it from the appearance of the switch.When buying and selecting, you can see the appearance and feel by your hands. The high quality switch has a smooth surface,no bubbles, no scratches, no stains,and the brand logo be clearly visible.
3.You'd better understand the material used for the DIP switch.
Whether the materials used are excellent in water resistance, flame retardant, insulation and impact resistance.Know clearly the material used for panel, pin, etc.
4.Technical strength of the manufacturer,what about the staffing and management skills of the company?
The technical strength of the manufacturer, the assembly process and the management of the company's rigorous work even quality consciousness,all these will affect the quality of the product directly.
5.Delivery inspection and after-sale service.
The last step is you should know that whether the ex-factory inspection method can achieve comprehensive quality inspection inside and outside the switch,and make sure the switch has a quality certificate,whether you will get a prompt reply when the switch goes wrong after buying.The more you know the more you buy feel relieved.