White LED Strobes - PCB design and interest thread

[AussiePhil]

DanoNJ

As long as the current is limited to 20mA using one or more small leds then yes i believe that they can be powered up all the, needs to be tested yet though.

As for a twinkle effect, that would involve some some of control, as designed these will just glow when powered up.

at 12v you would use 3 x 3mm (5mm) leds in series.

Cheers
Phil

 

[DanoNJ]

Maybe I missed something..... I thought that these were your standard type strobe lights that blink every few seconds while powered up. Am I wrong?

Dan

 

[DanoNJ]

Opps! i just re read the first post. Never mind.....

 

[AussiePhil]

Maybe I missed something..... I thought that these were your standard type strobe lights that blink every few seconds while powered up. Am I wrong?

Dan

From post 1
"What it is, is a White high power LED that has a constant current source and is pulsed on and off by your sequencing software."

------------Which you read as i typed-----------------

the term strobe i guess is misleading, but the LED versions got nicknamed "strobe" so it has stuck.

Cheers
Phil

 

[DanoNJ]

[
------------Which you read as i typed-----------------

the term strobe i guess is misleading, but the LED versions got nicknamed "strobe" so it has stuck.

Cheers
Phil
[/quote]

Yea. I see strobe for cheap and get all excieted....

 

[Tabor]

Image these as any other Led connected to a controller.
The only difference is we have implemented a constant current current circuit on the board.

It is possible to dim these.

The choice of controller is up to you, when testing I used a Ren64 and a DCSSR.
The "Strobe" effect is created by the software.

The ULN chips on a controller would be fine, check current handling. As stated in the first post up to 300ma.

As DanoNJ wants a twinkling effect he would most probably want some dimming capabilities.

The cheaper the controller used is probably better, as the channel count could get quite high.

We plan on testing all configurations of leds and voltages, video's will be up to give everyone an idea of what they would like.

Hope this helps, more info will come out once initial boards have arrived.

Tabor

 

[Tabor]

Certainly.

Up to a limit, prob looking at the 3mm led config or under driving the 1/2W leds.

I think you would be looking at around 80mA per channel.

 

[DanoNJ]

First let me say I know very little about this stuff, however, I was wondering if something like this may work. You could have a channel off your
controller energize this unit which would then run these LEDs. It has several settings - may be one in there that would be good. It would produce a
random pattern for several units set in series.
http://www.pcboard.ca/kits/ledfx/

Just a thought.
How off base am I?

 

[AussiePhil]

All

Got the constant current chips in the Mouser order yesterday and just had to wire a test circuit up.

I did stress test the device, running it at 12v and 95mA of current driving a parallel pair of Red leds (2.1v). just about worst case.

LED Strobe test

Cheers
Phil

 

[AussiePhil]

Second test

This time with a 3W RGY LED using just the RED LED... current set to 250mA

LED "strobe" test 2

Phil

 

[riri7707]

Very Interesting and great effect...
Some schematics to made it on Bread Board for tests too?
i appreciate...
Cheers, Henri

 

[RandyA]

Well I guess I will be in for 100.

Randy

 

[prof]

I am in for 100

Prof

 

[AussiePhil]

Hi all

A quick add up of the Quantity shows the following
Total 1842

cenote 100
Aproct 160
Thaiway 100
ron 100
KeithTarpley 200
solidmodeler 132
kevr 100
fathead45 200
smartalec 100
fasteddy 100
toodle_pipsky 50
Vairmoose 100
XDU 100
RandyA 100
prof 100
RIRI7707 100

I'll go ahead tonight and get a final price from the board house, we may have a pleasant surprise for everyone depending on freight charges.

Tabor - i will be ordering extra for you and me

Phil

 

[cenote]

Very excited, thanks phil.
Surprise = free components with order...