石榴姐

[Changshu University of Science and Technology] Touch adjustable lighting design (pure hard)

Overview

To realize the running water lamp function, a multivibrator based on NE555 is used. By adjusting the phase res receiving end and VCC resistance and other related parameters, a periodic signal per unit time is sent to the counting chip 74LS191, and finally decoded by 74HC138 The chip realizes the conversion of binary code, and finally realizes the flowing beat of the LED lamp. The delayed light-off function utilizes another circuit of NE555. Using the conductive characteristics of the human body, touch can be used to set the trigger terminal of NE555 to 0. This causes both the high input and low input currents to become higher, triggering a high level at the output in a short period of time. Therefore, the light is delayed for a period of time. This enables touch-delayed lighting.

Design Files

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Update:2025-06-24 13:45:19

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