The Tosduino Mega2560 costs 25€ and the mega2560 costs 50€ which is double the price.
And on ebay i see mega2560 boards for like as cheap as 18€, mostly from hongkong.
Except from the colour red i dont see any differences, what are they?
lax123:
wow thank you very much , this is great because i got an uno and this could save me quite some bucks i could spend on other fancy ardu hardware.
You are welcome.
Its says "can switch fast" between different pins, do you have an idea which range "fast" means?
I don't. The datasheet is the best place to get answers for questions like that.
Is there something like that also for digital pins?
I believe those chips will also work for digital inputs. For digital outputs shift registers are a good choice.
The Nat Semi chip states 500ns is typical switching time between pins.
With the AVR processor running at 16 MHz that would be 8 machine cycles. A very very short delay after switching would be a good idea (_delay_us(0.5);).
sometimes i see code with like delay(1) delay(2) all over the place. whats the reason for that?
I assume for the same reason I proposed a delay: to give something time to change states. But, without a context, I have no way to answer definitively.
i mean, in this case, ok it takes time to switch, so u want to wait a little bit.
It takes very very little time to switch; eight or fewer machine instructions. The delay I suggested is three and a half orders of magnitude shorter than delay(1).
is that the only reason to use delay at all?
That's the only reason I would ever use delay.
do you know if there r important differences between those 4051?
I have no idea. Someone else will have to help with that question.
that CD 4051 is actually called HEF4051BP (cmos, phillips)) and there is MC14051BCP, that HEF is actually the cheapest i find on ebay 24cents per piece.
that CD 4051 is actually called HEF4051BP (cmos, phillips)) and there is MC14051BCP, that HEF is actually the cheapest i find on ebay 24cents per piece.