2 Pcs NE555+CD4017 LED Chaser Water Flowing Light Module DIY Kit Electronic Circuit

2 Pcs NE555+CD4017 LED Chaser Water Flowing Light Module DIY Kit Electronic Circuit.Feature: 1. Mainly composed of clock generation circuit and decimal counter circuit. 2. The self excited multivibrator with NE555 as the core, the power supply charges capacitor C1 through R2, R3, R4. When C1 starts charging, the 2 pin of NE555 is still at low level, so the output pin 3 is high level. When the power supply is charged to the 2 3 power supply voltage through R2, R3, and R4, the output pin 3 level c