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Water lamp project

Overview

The production of this running water lamp is mainly realized using NE555 and CD401, and no code is needed to implement it. The general principle is that EN555 acts as a signal generator and continuously outputs a square wave pulse signal after power on, and then the pulse signal is input to CD4017. CD4017 is a decimal counter. When it receives the pulse square wave, it will start from 0-9. Output high level, when the output is high level, the LED light will be on, when it is low level, the LED light will be off. If high and low levels are continuously output, the LED light will flash from L1 to L10 in sequence, and then start again. Through the potentiometer, changing the ratio of the two resistors changes the charging and discharging time ratio of the capacitor, thereby controlling the frequency of LED flashing.

Design Files

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It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

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Update:2025-06-18 22:55:06

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