Drl headlight project

Projects General Guidance
1

Hi
I am a newbee with arduino and I am attempting a project with DRL in a headlight.
My objectives are as follows
1 ) a set of 42 LED'S positioned in a circular shape.
2)These LED'S has to be able to light up at the same time in mode 1 (normal driving)
3) In mode 2 I want to run a knight rider program,
4) Mode 3 is a program where 5 led's fade in and out at the same time. Every cycle the first led must be released from the other 4 and the next led lit up with the other 4 thereby creating a moving snake effect(basically a fading in sequence with 5 led's lighting up at the same time)
5)Mode 4 will be a basic blinking led program.
6) all of these functions must be controllable using a 4 button remote with reciever

I need help with the following
1)How do I get all 42 led's to light up at the same time?
is this even possible with the arduino mega board?
2) sketching of the 5 led fading sketch.
3) Best possible hardware configuration

I would really appreciate it if anyone can help me with this.

2

Hi
I seem to have one problem solved.
in order to have multiple led's lightning up at the same time I used the standard blinking light sketch and made the value on delay 0
Therby the lights come on at the same time and stays on.

Can anyone suggest a resolve to the fading led problem?

3

LEDs can be dimmed easily by supplying them with lower voltage, or much more easily with an arduino, a PWM signal.
Are you running the LEDs directly to the Mega or have you added a transistor switch to handle the current?

Also a great way to get everything to work together is to group your LEDs together and have them all run through the same transistor. It will probably make your life easier.

4

Thanx for the info
thusfar the led's are powered directly from the mega.
Is there a sample sketch of multiple led's fading?
Having them fade in sequence is probably my biggest challenge

5

Awesome
Being new to sketching and electronics I must say that I am extatic .
I have written a sketch that allows the leds in this project to move like a snake.even though I haven't met the objective of them fading I am very pleased with the outcome.
Quick question
can I write two or three sketches in one big sketch and activate the one that I want with a multi switch?

6

I have written the knight rider sketch, but after the first loop the arduino does its own thing.
mmmmm any suggestions as to what could be wrong?

7

Would it wordk if I did the following in order get multiple sketches to run from a multiple switch

In conjunction with the "if"&else commands and 4 pins defined as inputs, switching between the input pins activate a different part of the sketch
Has anyone one this and have a sample that I could look at?

8

is this a topic of low interest to the people of arduino?
I am a bit confused as to why I am not getting feedback from the other people on the site

9

sakkie:
is this a topic of low interest to the people of arduino?
I am a bit confused as to why I am not getting feedback from the other people on the site

You seem to be in an early learning stage and you're asking questions with fairly obvious answers or which could be answered with minimal searching. When you get stuck with a specific problem that you have no idea how to solve -- that's when you should be asking questions.