"Feng Wenpei, you don't hide in it and don't say anything. I know you're at home. You have the ability to grab a man. How couldn't you open the door?" Even if Snowman yells, how radical, Fu Wenpei doesn't open the door. Why do you want to cry? Maybe it is because Fu Wenpei didn't have a doorbell. It's too painful to knock on the door by hand. If you have a bell, it will be fine until you can't open the door. That being the case, let's talk about the electronic doorbell.
Electronic doorbellThe electronic doorbell is made up of a time base circuit integrated block and peripheral elements. Its sound quality is beautiful and realistic. It is simple and easy to install, and its cost is low. A 6V laminated battery can be used for more than three months, and its power consumption is low.
Normally, both audio oscillators do not work and the speakers do not sound. When the guest presses the doorbell button, the doorbell is rapidly discharged and the two audio oscillators work at the same time. The resulting audio signal is mixed and amplified to drive the horn to emit a “click†sound. When the guest releases the button, the doorbell is quickly charged and the audio oscillator stops working. After the audio signal generated by the audio oscillator is amplified, the speaker is pushed to make a "click" sound.
How to buy electronic doorbell?
1, performance buzzer-like pronunciation tone cheaper, music-like sounds, music sing longer; electromagnetic ringing sound crisp and sweet, but the power consumption is larger, the doorbell (electromagnetic and integrated circuit type ) For those who have reverberated sounds for the best; interested users can also buy multi-function or music å®å’š double-tone doorbell.
2, in addition to the clear and crisp sound quality requirements, the main choice of moderate sensitivity, so as to avoid false triggering when used. Electromagnetic touch-bells should use two pieces of metal to sound and have a long reverberation. The quality of the doorbell switch is the key to buying the doorbell switch. A good doorbell switch has a brighter color, feels better and lasts longer. The most important thing about doorbell switch purchase is quality.
3, the power of the current doorbell useful AC is also useful battery. The battery-type power consumption is relatively large. AC power is generally divided into two types: high-voltage and low-voltage. When using a high-voltage (220 volt) type, pay attention to safety.
4, brand brand is no matter what kind of goods are more important. The brand's doorbell switch is not necessarily good, but at least it is more secure, it is recommended that you buy the doorbell switch the best choice for some good word of mouth, the brand's larger doorbell switch, at least what happens after the time, there is a little protection .
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