《家用电器》89年第11期上刊登李蒙同志的《趣味玩具电话》一文,本人颇感兴趣,参照该文制做并加以改进,在原有设计的基础上,增加了一付电池、一只讯响器和单双联微动开关,效果令人满意。 改进后的电路如图,A、B两机结构完全相同,这里只绘出其中之一,两机都用两节电池做电源,配有讯响器和放大器,两机间地与地、Y与Y对应连接。微动开关K_1为电源开关,平时处于断开位置。双联微动开关K_2为工作转换开关,平时处于接通放大器、断开讯响器电源的位置。 改进后的特点;一是两机功能结构完全相同,且放大器与讯响器为并联,可同置于一个线路板上,使制做更加简单,利于成批加工。二是两机间只用双线连接,一般双 “Home Appliances” in 89 eleventh issue of Comrade Li Meng’s “fun toy phone,” a text I am quite interested in, with reference to the text made and improved, based on the original design, an increase of a battery, a Only news and single double micro switch, the effect is satisfactory. Improved circuit shown in Figure, A, B two machines exactly the same structure, where only one of the draw, two machines are used to do two batteries power supply, with a ring and amplifier, between the two machines and the ground, Y and Y corresponding connection. Micro switch K_1 for the power switch, usually in the off position. Dual microswitch K_2 for the job changeover switch, usually in the amplifier, disconnect the sounder position. Improved features; First, the two functional structure is exactly the same, and the amplifier and the speaker for the parallel, can be placed on a circuit board, making the system easier and conducive to mass processing. Second, only two-wire connection between the two machines, generally double