2pcs Water Flowing Light Module NE555 plusCD4017 LED Chaser LED Running light

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 changes from high to low, and the NE555 internal discharge tube is turned on. The capacitor C1 is discharged through the 7-pin of R4, R3, and NE555. Specification: Item Type:Water Flowing Light Voltage:2.5~14.5V Size:5.4 x 2.1cm / 2.13 x 0.83in Thickness:1.6mm Package List: 2 x Module