There are many types of switches, and delay switches are one of them. This type of switch is generally not used in homes. It is more commonly used in public areas, such as corridors or public spaces. *Bathroom, this kind of switch is more energy-saving and convenient, but it is best to choose carefully when buying. Quality is a very important part. Next, let us introduce to you what a delay switch is.

1. What is a delay switch

1. The delay switch is a new type of automatic delay electronic switch developed to save power resources. It is power-saving and convenient. Mainly used in stairwells, bathrooms and other places. The delay circuit is composed of R6, C4, D6 and other components. Combining the analysis of the voice control circuit and the main circuit, when the thyristor T1 is triggered to conduct, the voltage on C1 decreases, the MIC pickup sensitivity decreases, T2 re-saturates, (11) pin is high level, and (3) pin becomes low level. Due to the isolation effect of D6, the voltage on C4 still maintains the high level of pins (5) and (6), and the pin (10) is also high.

2. The voltage on C4 is discharged through R6 until the voltage on C4 drops to the IC logic low level, (10) pin becomes low level, and the voltage between the positive and negative electrodes of thyristor T1 exceeds It is blocked in the positive direction at zero time, and the voltage on C1 rises again. The MIC restores the pickup sensitivity and waits for the next voice control signal input. The time when the potential of IC (5) and (6) pins decreases from high level to low level. That is the maintenance time of the switch on, determined by the values ????of C4 and R6.

3. Regarding the principle of delay switch, many people do not know much about it, so next we will take a closer look at it. First, the right side of the dotted line of the delay switch circuit is general lighting. circuit, the left part is the electronic switch part. VD1 ~ VD4 and VS form the main circuit of the switch, and IC forms the switch control circuit. Normally = VS is in the off state and the light does not light up. VD1 ~ VD4 output 220V pulsating DC current, which is current limited by R5, VD5 stabilizes the voltage, and C2 filters and outputs about 12V DC power for IC use. At this time, the LED lights up to indicate the switch position, making it easy to find the switch at night.

2. How to choose a delay switch

1. Check the quality: There are many buyers making choices in the market, and it is inevitable that some people will not know how to choose a good delay switch quality. , Generally speaking, the surface should be bright and without any burrs on the edges.

2. Check the appearance: Check the appearance of the delay switch. Generally, switches with better texture will have the function of resisting compression deformation, so we should pay special attention when purchasing.

3. Check the brand: There are always many brands of delay switches on the market, so we should not only choose good brands as the first choice, but also its after-sales service is also very important, and we need to have certain knowledge. Assure.

4. Check the packaging: Next, you can also check the outer packaging of the product. Generally speaking, products from regular merchants will indicate the trademark, rated voltage, factory address, etc. on the packaging. If the printing is not clear, it is basically It can be judged to be inferior.

Delay switches are widely used now and are very convenient to use, but you must look at the quality when purchasing, otherwise the service life will be short. So what is the delay switch introduced by the editor above? You understand it all, if you want to know more decoration information, please continue to pay attention.