Hi! I have completed the great race, but there is a problem, here's the video.
Can you guys tell me what is the pin of the 7442 has problem?
thank you!
marC:)
video link : http://www.youtube.com/watch?v=8-016DCC ... e=youtu.be
the great race completed but only 1 problem.. look at my vid
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Re: the great race completed but only 1 problem.. look at my
It looks as though you have something shorted. You shouldn't have any RED led's lighting up on that second bottom row.
Have a good look at your circuit to see if you can find some shorts.
Have a good look at your circuit to see if you can find some shorts.
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- Can't get enough of electronics!
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Re: the great race completed but only 1 problem.. look at my
what is the output of the 7442 to lit up the second bottom row??brad wrote:It looks as though you have something shorted. You shouldn't have any RED led's lighting up on that second bottom row.
Have a good look at your circuit to see if you can find some shorts.
so i can see if something is shorted.. in there
thank you!
marC:)
- brad
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Re: the great race completed but only 1 problem.. look at my
I'm not sure exactly what you mean but are you referring to the logic level coming out of the 7442? Because there will be a logic 0 coming out of the 7442 each time it is enabling one of the rows of cathodes.
I would just get a multimeter (on resistance setting) and check for any short circuits between the matrix pins.
I would just get a multimeter (on resistance setting) and check for any short circuits between the matrix pins.
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