NE555+CD4017 Light Water Flowing Light LED Module Assembly

Descriptions

 

This kit is a great way to practice your surface mount component soldering skills and to see them working at the end of your practice.

Description

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The kit main circuit and decimal counter circuit generated by the clock, by the NE555 as the core of self-excited multivibrator power through R2, R3, R4 to charge the capacitor C1, C1 when the beginning of charging, NE555 2 feet still in low, so the output pin 3 goes high when the supply by R2, R3, R4 to charge C1 to 2/3 the power supply voltage, the output pin 3 level from high to low, NE555 internal discharge conduction the capacitor C1 through R4, R3, NE555 7 feet discharged until the voltage across C1 is less than 1/3 of the power supply voltage, NE555 3 feet level and from low to high .C1 and recharge, This cycle oscillation formed. Charging time: 0.695 (R2 + R3 + R4) C1, discharge time: 0.695 (R4 + R3) C1, R4 may be adjusted to control the output frequency of the oscillator, the oscillation clock signal is applied continuously NE555 CD4017 14 feet, On 10 CD4017 is connected with the output of 10 LED, when 10 turns the output of CD4017 produce a high level in the clock signal is applied, the D1 - D10 are sequentially lit to form water lights effect.

Adjusting the flow rate can be adjusted R4 LED lamps.

 

Component parts list:

 

 

Elements Name Quantity

PCB board 1

2P bent pin 1

1UF capacitor 2

3mmLED Red 10

1K resistor 10

2.2K resistor 1

10K resistor 1

50K white blue potentiometer 1

NE555 1

CD4017 1