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本文介绍的彩灯闪光器由一块LT156构成。它具有组装简单、成本低廉等优点,可广泛用于花瓶、镜框画及各种电子玩具的装饰与点缀。电路工作原理该装置的工作原理如图1所示。LT156是一块专用集成电路,它的内部电路包含了信号整形、脉冲计数、译码时序输出和低频振荡器,因此不需要外加振荡电路即可使其输出端②、④、⑥、⑧脚依次导通。由于内部的驱动管采用拉入电流方式,故平时截止时输出高电平,导通时变为低电平。LT156的第⑩脚是内部振荡器的输出端,第[12]脚是计数器的输入端,将IC的⑩脚与[12]脚连通,即可在内部振荡器的作用
This article describes the lantern flasher by a LT156 form. It has the advantages of simple assembly, low cost, etc. It can be widely used in the decoration and embellishment of vases, picture frames and various electronic toys. Circuit works The device works as shown in Figure 1. LT156 is a special integrated circuit, its internal circuit includes signal shaping, pulse counting, decoding timing output and low frequency oscillator, so do not need to add the oscillation circuit to make its output ②, ④, ⑥, ⑧ pin in turn through. Due to the internal drive tube with pull-in current mode, it usually output high end of cut-off, turns low. LT156 ⑩ pin is the output of the internal oscillator, the first [12] feet counter input, the IC ⑩ feet and [12] feet connected to the role of the internal oscillator