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Belgium
Asked — Edited

Volt Regulator

are these to get for 3 volt also ?


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PRO
Belgium
#13  
rr

what would be the Ma be from 8 red soft leds in serie?
#14  
You would want them in parallel not series... Well if they each pull 1mA then 8 in parallel would be 8mA.... If you put them in series you'll need 24V to power 8 Leds at 3V each...
PRO
Belgium
#15  
wow.so parallel is all separt?
i have to use 8 ports to?
#16  
no... parallel is all on one pin.... see picture for both series and parallel circuits... First picture is series...
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PRO
Belgium
#17  
ah all possitif one side and negatiff to.
so avery positif has two red wires.
i wonder what you can do in a script whit these leds.

thanks


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#18  
With a parallel circuit just make sure the combined power draw of your Leds is less than 20mA.... Assuming they do only draw 1mA, I still wouldn't use more than 10 (in parallel) on a single digital pin....

Code:


#LED is on Pin D0
set(D0,ON) # turn on the leds
sleep(2000)
set(D0,OFF) # turn off the leds


or

Code:


#LED is on Pin D0
# turn on slow
$dim=1
repeatuntil($dim=101)
PWM(D0,$dim)
print($dim)
sleep(50)
$dim++
endrepeatuntil
# turn off slow
$dim=100
repeatuntil($dim=0)
PWM(D0,$dim)
print($dim)
sleep(50)
$dim--
endrepeatuntil
PRO
Belgium
#19  
i got 8 red ones very low.they come from 3 dollar for 100 pieces on ebay
PRO
Belgium
#20  
am gonna test your script to.
i found this.





this is awesome




led blinking


PRO
Belgium
#21  
i try the script that richard r wrote for me and it looks great.
so i made a video how it looks.


PRO
Canada
#22  
Just to chime in about the 20mA limit on I/O pins. This is the case with most microcontroller boards out there but the ez-bv4 actually has current limiting resistors on the I/O pins limiting the current to ~10mA to allow you to hook up LEDs directly to the I/O pins if you'd like.
PRO
Belgium
#23  
jeremie

thanks for telling.i can use the flikkering leds,they are just 1Ma.
United Kingdom
#24  
@nomad.

You done well with the LED's. Looking good.:)

@Jeremie.

So the digital signal pins are limited to 10Ma then? I was lead to believe it was 20Ma as well.
PRO
Canada
#25  
@Steve G if by 10Mh you mean 10mA then yes!:D
PRO
Belgium
#26  
STEVE G/JEREMIE

i though six and galapagos can use some sparkeling,hehe

thanks
#27  
@Jeremie I didn't see the digital pin's current limitations in the ezb4 spec sheet so I assumed it was 20mA (as you mentioned) like other micros.... Thanks for clarification....
PRO
Belgium
#28  
i made some leds to test.these have all separt ports to be able random lid up.
is this possible to when i use all leds on one port?


United Kingdom
#29  
@nomad.

Not directly, no. They would flash at the same time. Although that's not to say you couldn't make a circuit (if you know how to) and run them off one port so they flash independently. I wouldn't know how to make such a circuit so I can't help much, but maybe somebody else does. Or see if you can find an LED flashing circuit online from somewhere.
PRO
Belgium
#30  
steve g

ok steve thanks
PRO
Belgium
#31  
here the 8 eyes off six.i made them a little slower then as chown in the video.
now it needs detection mode rapid flaching.


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