hi
i must design build and make the C code for a very flasher for the assignment project.
It must operated at 12W as the blinking frequency of the led is reduced to the standard value.
what ucontroller will be fast enought for this code? will the mcs51 be fast enough or will the arm be fast enough? which will be good to do the 12W? ARM is low power and i think it will not do 12W.
regards mitsus
what ucontroller will be fast enought for this code? will the mcs51 be fast enough or will the arm be fast enough? to be humanly visible I can not visualize anything more than 10Hz and I can not visualize any uC that will not be capable of, at least, 1000 times that
which will be good to do the 12W? ARM is low power and i think it will not do 12W. I know of no micro capable of that directly, look at e.g. Allegor for interface chips
Erik
"I must design build and make"
Sorry - who, exactly, is supposed to be doing this project?
"the C code for a very flasher"
What is a "very flasher"?
"It must operated at 12W..."
What does that actually mean in terms of C code?
"...as the blinking frequency of the led is reduced to the standard value."
What LED?
What is "the standard value" of the blinking frequency?
How does that impose a 12W requirement?
"what ucontroller will be fast enought for this code?"
You haven't actually stated any speed requirements - so how can anyone answer that?
"will the mcs51 be fast enough or will the arm be fast enough?"
For a simple flasher, all you need is multivibrator - which you could do with discretes, or a 555 timer!
"ARM is low power and i think it will not do 12W."
As Erik said, no processor will direcly control 12W. With suitable external components, any processor can drive 12W.
Are you really sure you mean 12W as in power, and not 12V as in voltage?
12W with modern LED would be way to strong for a turn signal - it would be similar to the main headlight.
A normal processor can't handle 12 volt directly. But you can use a drive transistor. Google is your friend - and you are also expected to already know enough electronics to design this thing yourself. You would not get an assignment that isn't reasonably hard in relation to the knowledge level for the students taking the course.
The OP just said "flasher" - which could mean many things.
You're guessing that he actually means "turn signal"...
Actually, he said "very flasher" - which doesn't appear to mean anything at all!
Correct - the OP did write a lot of things that doesn't make sence.
But if you check my post, I did not claim he meant a turn signal. I just suggested that if it was a turn signal, 12W would be very, very much for a LED-based turn signal.
"12W with modern LED would be way to strong for a turn signal - it would be similar to the main headlight."
As is quite common with the "simplest" requests, the OP will have to come back and elaborate. If language is a problem, he/she should still be able to understand "turn signal" and have the chance to object, in case that "very flasher" is instead a police-style blue flashing light or something else.
One of the reasons for my comment is that most people tend to focus on voltage and current, unless talking about very, very powerful equipment (such as 10hp motor or 2kW work lights or similar). And it is way more common to talk about what volt/current a processor can stand than to discuss how many watt it can control. The unit W is normally only involved when discussion total power dissipation.
Actually, "watts" is very commonly used when discussing lamps - especially incandescent lamps.
But (over here, at least) 12W is an odd value for a vehicle mandatory lamp - "bright" lights like turn signals are 21W; tail lamps and other "not bright" lamps are 5W.
Then again, he may well not be talking about such "mandatory" lamps...
But there is, as you said, a fair suspicion that he meant 12V rather than 12W.
"the OP will have to come back and elaborate"
I won't be holding my breath!