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Topic: LED problem (Read 1 time) previous topic - next topic

pranoy

Hi guys,
           I am doing a project with LEDs on traffic light
    I have connected the RED and GREEN leds in reverse polarity and took the input to these pins to an AND gate and connected the output to YELLOW led.


when i am running the pgm i use the following logic

01 for RED
10 for GREEN
11 for YELLOW


but in my circuit my yellow light is ON with a minimum brightness even when the other LEDs are ON
what is the problem?????

pls help guys

I used 7408 as my AND gate

JimboZA

They say a picture is worth a thousand words.... I don't follow the circuit description- a diagram would make it muuuuuch easier.
Roy from ITCrowd: Have you tried turning it off an on again?
I'm on LinkedIn: http://www.linkedin.com/in/jimbrownza

pranoy


       i will get the ckt in a bit

pranoy




this is a rough sketch

pranoy

this is a rough sketch

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