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LED Flash Run Light LED 555 4017 SMD Elect Kit [BJ]

LED Flash Run Light LED 555 4017 SMD Elect Kit [BJ]
Categories: Displays  LED Kits 
Product Code: ledkit5554017smd
Views: 32
Availability: 10
Price: R39.95
Qty:     - OR -   Add to Wish List
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Power supply voltage: 2.5--14.5V

PCB size: 5.4cm * 2.1cm
PCB thickness: 1.6mm
 
Circuit:
 
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 x 10sets
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

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