Tap the current switch of the switch

 

Touch switch is also a kind of switch that can control the current. The use of this switch is very popular. In the use of more, so the circuit is also need to understand the situation, the following detailed introduction.

At present, many customers are not very clear about the distinction between touch and key, in fact, both can be called key. Just as the name implies, we consumers are using product types, and those with functional response can be called buttons, but the current touch control can't be called buttons. Light touch switch refers to the surface light press to disconnect to interrupt the current in the circuit, let the current information react with the main control function IC to realize the function. Key switch means that when we press it, there will be an automatic locking circuit, which will lead to the current conduction to achieve our on-off performance. Once the circuit is locked, the current is flowing all the time to achieve long-term power on, also known as power switch. So the two kinds of circuit design are totally different, but they have very similar functions, so many people who are not in the electronic industry are confused.

The circuit features of tap switch are relatively simple, but the functions are relatively rich. Several functions can be designed with a single press. Each current response can be designed as a kind of recognition. For example, we can control the volume, increase or decrease the sound with each press, and can also be used to control the switching function of the product. This is the case with the power button of mobile phone, that is to say This is why the switch is widely selected. The circuit design of the key switch is simpler, but the function is also very simple. Generally, it can only be used as the power button, because every time we press it, as long as the line is locked, the power supply is always on, and the product will always work. For example, once our TV is turned on and off, we have to wait for us to turn it off, that is, the function of the key switch. After the above introduction, I believe that you will understand the circuit characteristics and design methods of touch and button, and know how to distinguish and use it!