Water Lamp Kit NE555 + CD4017 Water Lamp Electronic DIY Spare Parts Electronic Production Electronic Suite Ne555p & 4017

Weight: 6.7g

Package Name: NE555 + CD4017 Water Pump Kit / Parts
Power supply voltage: 2.5--14.5V
PCB size: 5.4cm * 2.1cm
PCB thickness: 1.6mm

Circuit principle:

This package is mainly composed of clock generation circuit and decimal counter circuit, the NE555 as the core

Of the self-excited multivibrator, the power supply through the R2, R3, R4 charge to the capacitor C1, when the C1 just started charging

, NE555 2 feet are still low, so the output 3 feet are high, when the power by the

R2, R3, R4 to C1 charge to 2/3 power supply voltage, the output 3 pin level from high to low, NE555

The internal discharge tube conduction, capacitor C1 by R4, R3, NE555 7 feet discharge, until the voltage across the C1

When the power supply voltage is lower than 1/3, the NE pin of the NE555 changes from low to high.

Times the charge, so the cycle of the formation of oscillation. The charging time is: 0.695 (R2 + R3 + R4) C1,

Discharge time: 0.695 (R4 + R3) C1, adjust R4 can control the oscillator output frequency

Rate, NE555 clock oscillation signal constantly added to the CD4017 14 feet in the CD4017

10 output terminals connected to 10 LED, when the CD4017 10 output in the clock signal role

The next round to produce a high level, then D1 - D10 followed by light, thus forming a water lamp effect.

Adjust R4 to adjust the flow rate of LED lights.

Parts of spare parts:

Number of component names

PCB board 1

2P bending needle 1

1UF capacitor 2

3mmLED Red 10

1K resistance 10

2.2K resistance 1

10K resistance 1

50K blue and white potentiometer 1

NE555 1

CD4017 1