本人试用过市售的多种无线遥控门铃,大多使用分立元件构成,电路简单、成本低,但不同程度地存在着门铃误响的弊端,工作不太可靠。尤其不如人意的是,由于各门铃之间同频,各家各户使用同一产品时相互干扰。又由于电路简单,抗干扰性能亦很差,空间的各种电磁杂波也易触发门铃闹响。那么能否设计出一种电路既简单、性能又优异的无线门铃呢?回答是肯定的。本人经过对多种电路的研究、组合、筛选,最后选定了本文介绍的电路。 I tried a variety of commercially available wireless remote control doorbell, mostly composed of discrete components, the circuit is simple, low cost, but to varying degrees, there are drawbacks of doorbell error, the work is not reliable. Particularly unsatisfactory is that due to the same frequency between the doorbell, each household use the same product interfere with each other. And because the circuit is simple, anti-jamming performance is poor, the space of various electromagnetic clutter is also easy to trigger the doorbell alarm. So can design a circuit is simple, excellent performance and wireless doorbell it? The answer is yes. After a variety of circuits I studied, combined, screening, the final selection of the circuit described in this article.