The RequestHi I need your help.i want to build the new Knight rider mustang light for my car scoop.What i have read is. It's made up out of 480 distinct LEDs, arranged in three rows of 80 in each row, then divided up into two sides.
My question is how you build it. The size i want to work with is 12 inches in length by 1/2 inch in width. How many rows of leds will i get by that dimension. What kind of led to use ?What can i use for the diffuser case? What to use for the control box.
1) LEDs light up in a bar mode fashion from the two ends of the strip and meet up at the center, illuminating the whole module brightly.
In the next sequence the LEDs begin shutting off in the same sequence as above from the outer extreme ends until all the LEDs are switched OFF.
The rate or the speed of the above procedures are adjustable through a pot as per individual preferences.
2) The second scanning sequence is similar to the above, except the shutting off procedure which is done for all the LEDs at once instead of one at a time.
The above two functions can be easily implemented using a couple of 74LS164 ICs and a 555 IC oscillator as shown in the following circuit diagram:
In the shown mustang scanner LED light circuit, a couple of 8-bit parallel-out shift register ICs 74LS164 are employed, driven by the IC555 configured as the clock oscillator.
The circuit may be understood by considering the following two modes in the design:
this position the LEDs illuminate in an sequencing LED bar like fashion
with every rising edge of the clocks from the IC555 until all the LED light up and the final "high"
reaches pin16, when T1 momentarily resets both the ICs
producing in instant shutting off of all the LEDs at once.In
the actual prototype the LEDs from Q9----Q16 must be arranged such that
Q16 faces Q8, while Q9 faces the outer end of the relevant strip.
As soon as the above happens, a new cycle initiates afresh and the cycle repeats for so long as the S1 position isn't changed.
Another interesting scanner function that could be easily added to the above circuit with a feature producing rapid to and fro sequencing over the two strips in groups of four.
This could be easily done by toggling an arrangement wherein T1 would freeze once all the LEDs switch ON in bar like style.
Now in this position a 4017 with its own oscillator would come into the scene with its outputs switching OFF the lit LEDs rapidly in a reverse forward manner. The switching could be done using BJTs which would ground the relevant anodes of the LEDs in the process.
So now we have three interesting scanning sequences toggled in our very own homemade mustang LED scanner circuit, any more possible solutions are welcome from the readers.