Volt Regulator

Question

are these to get for 3 volt also ?

Dunning-Kruger · Answer

Nope...ez robot only makes a 5V version... What do you need 3V for?

Dunning-Kruger · Answer

If you need a 3V version buy an adjustable one from... Josh... Adjustable voltage regulator

Nomad 6R · Answer

RR from joch are 4.7 volt.i need 3 volts.i got led blinker with swiths. i thought to build in the dome.

bborastero · Answer

@nomad18.08 the white digital pins (signal) are 3.3v just connect black to any ground and positive to a white digital pin and add a PWM control that's how I control small LEDs

Nomad 6R · Answer

BBORASTERO no need for regulator then. thanks

Nomad 6R · Answer

bborastero that works great.

DJ Sures · Answer

Wooo! It's twinkly at nomad's

Nomad 6R · Answer

dj it will look good on six and galapagos bot.

bborastero · Answer

glad to be of service

Dunning-Kruger · Answer

@nomad... just make sure if you are using the signal pin to supply power to those leds, that they are not pulling more than 20mA (edit correction that is 10mA not 20mA) or you could damage your digital pins... The digital signal pins cannot supply that much curremt....

Nomad 6R · Answer

rr i read here the manuel off the leds.1Ma 3 volts. thanks for the warning.

Dunning-Kruger · Answer

@nomad... awesome, you're good to go then...

Nomad 6R · Answer

rr what would be the Ma be from 8 red soft leds in serie?

Dunning-Kruger · Answer

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...

Nomad 6R · Answer

wow.so parallel is all separt? i have to use 8 ports to?

Dunning-Kruger · Answer

no... parallel is all on one pin.... see picture for both series and parallel circuits... First picture is series...

Nomad 6R · Answer

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

Dunning-Kruger · Answer

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

or
 #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

Nomad 6R · Answer

i got 8 red ones very low.they come from 3 dollar for 100 pieces on ebay

Nomad 6R · Answer

am gonna test your script to. i found this.  this is awesome  led blinking

Nomad 6R · Answer

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

Jeremie · Answer

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.

Nomad 6R · Answer

jeremie thanks for telling.i can use the flikkering leds,they are just 1Ma.

Steve G · Answer

@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.

Jeremie · Answer

@Steve G if by 10Mh you mean 10mA then yes!

Nomad 6R · Answer

STEVE G/JEREMIE i though six and galapagos can use some sparkeling,hehe thanks

Dunning-Kruger · Answer

@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....

Nomad 6R · Answer

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?

Steve G · Answer

@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.

Nomad 6R · Answer

steve g ok steve thanks

Nomad 6R · Answer

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.

Nomad 6R

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