SunRobotics Water Flowing Light LED Module NE555+CD4017 DIY Kit Electronic Components Electronic Hobby Kit

C1 and charge again this cycle oscillation formed. Charging time : 0.695 (R2 R3 R4) C1, discharge time: 0.695 (R4 R3) C1, R4 can be adjusted to control the output frequency of the oscillator , the oscillation clock signal is applied continuously NE555 CD4017 14 feet , the output terminal 10 is connected with the CD4017 10 LED, when the output terminal 10 turns CD4017 generated clock signal at a high level, the D1 – D10 are sequentially lit to form a water-light effect. You can adjust the flow rate adjustment R4 LED light.