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Press S1, U1 NE555 integrated circuit 2, 4 pin will get low level at the same time; 555 output 3 pin is low level, 7 pin is discharging and 6 pin is low level.
If loosen S1, 4 pin will become high level, then 2, 6 pin are both low level. Therefore, U1 NE555 output 3 pin is high level, Q2 is connected and the 4pcs LEDs on the left group will be on;
At the same time, Q3 is connected, U2555 output low level, and the LEDs on the right group will be off.
The controller can control the on/off of the red lamp, green lamp and yellow lamp from four directions.
When the red lamp on the east and west is on, the lamp on the south and north is on, and the cars and passers-by can go across the street;
when the lamp on the east and west is transforming into green from red and the lamp on the south and north is transforming into red from green, the yellow lamp will flash.
|1||Name||Traffic light DIY Kit|
|2||Operating Voltage||DC 4.5-5V|
|NO.||Component Name||PCB Marker||Parameter||QTY|
|9||Metal Film Resistor||R1,R2,R8,R14,R16||10K||5|
|10||Metal Film Resistor||R3,R4,R15||510K||3|
|11||Metal Film Resistor||R5,R6||1M||2|
|12||Metal Film Resistor||R7||100ohm||1|
|13||Metal Film Resistor||R9,R10,R11,R12,R13||1K||5|
NOTE: You can complete the installation by PCB silk screen and the component listing.
Finished Product Picture:
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Tested by ICStation's Outstanding Partner Martyn Davies:
Learn More Details in the Video:
(The language in the video is English)
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(1) Due to the high risk of package lost recently, we have to stop using the free shipping way these days. Hope for your kind understanding! And the $5 is for tracking number and delivery insurance ^0^ Enjoy order from us.
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7-15 working days to: Most of Asia countries
10-16 working days to: USA , Canada , Australia , UK , Most of Europe countries
13-20 working days to: Germany , Russia
18-25 working days to: France , Italy , Spain , South Africa
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Total price of the order >= 200USD or Total weight of the order >= 2.2KG
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