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本文介绍一种闪光音乐电话听筒座,当您接听电话去找人时,可将电话听筒放在此听筒座上,它会发出悦耳的音乐声和醒目的闪烁光,这样既可使对方等电话时欣赏音乐不感到寂寞,又可不断提醒您:电话被搁着,对方在等着电话。 闪光音乐电话听筒座的电原理图见图1。该电路由音乐发声电路和闪光振荡电路两部分组成。BG为音乐三极管,可根据自己的喜爱选择音乐,当 BG的②脚接电源+3V、①脚输出接扬声器、③脚接电源负端时,扬声器就会发出悦耳的音乐声。闪光振荡电路是一个互补型自激振荡器,由PNP与NPN三极管构成,源源不断地产生电脉冲,使发光二极管闪闪发光。R1、C1的数值决定闪光的快慢。
This article describes a flashing music phone receiver, when you answer the phone to find someone, you can put the phone receiver on this receiver, it will emit a melodious music and eye-catching flashing light, so that each can wait for the other phone Do not feel lonely when listening to music, but also continue to remind you: the phone was on hold, the other is waiting for the phone. Flash music phone receiver power schematic shown in Figure 1. The circuit consists of music sound circuit and flash oscillation circuit composed of two parts. BG is a music transistor, you can choose according to their favorite music, when the BG ② feet connected to the power supply +3 V, ① pin output speaker, ③ foot negative power supply, the speaker will emit sweet music sound. Flash oscillation circuit is a complementary self-excited oscillator, the PNP and NPN transistors, a steady stream of electrical pulses, the light-emitting diode glittering. The value of R1, C1 determines the flash speed.