With TTL NAND gates and a small number of components can form an acousto-optic metronome , which is easy to start, easy to adjust, sound and light can alternately appear, the figure shows the line of the acousto-optic metronome. The illustrated line beat frequency is 5~300 beats/min. It consists of three parts: ring oscillator, photoelectric switch and audio oscillator. The ring oscillator consists of the NOT gates F1 and F2. If the potential at point A goes from high "1" to low "0", the potential at point B becomes "1"; the potential at point C changes from "1" to "0", because the voltage on both sides of capacitor C1 cannot be abrupt, so point D The potential is equal to the high voltage "1" at point B, and the potential at point M is changed from "1" to "0". This article refers to the address: http:// Automotive Switch
Automotive Switches
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