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New Product: Ultimarc PacLED64 LED controller

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AndyWarne:
[quote author=Franco B link=topic=108364.msg1150650#msg1150650 Thats a shame Andy. I wanted to wire four RGBs together and then run them off three outputs ( plus one 5v contact). I can wire them in parallel to achieve this but it sounds like that won't work with your board and I don't think you can wire standard 4 lead RGBs in series can you?

[/quote]

No this will not work with RGB. Note LEDs should not be directly wired in parallel as there is no way to ensure they all share the current equally, as they dont have a fixed resistance.

mlalena:

--- Quote ---I don't think you can wire standard 4 lead RGBs in series can you?
--- End quote ---
Yes you can. You just need more than 5V. I use this LED calculator on the web. Ex: http://led.linear1.org/led.wiz
On a 5V line you can only get two 1.8-2.1 LEDs. To get more you would need to use a relay.

Hook the 5V output & ground from the PacLED64 to the coil of the relay. Then run a 12V line (spare drive power from the computer) through the common line in the relay and connect the LEDs to the NC (Normally Closed) pin on the Relay and the ground on the computer drive power. With the 12V from the computer, you won't have any chance of an milliamp overload issue either.

Links
http://en.wikipedia.org/wiki/Molex_connector#Disk_drive_connector_.28Molex_8981_Series_Power_Connector.29
http://en.wikipedia.org/wiki/Relay#Pole_and_throw

AndyWarne:

--- Quote from: mlalena on January 08, 2011, 05:29:11 pm ---
--- Quote ---I don't think you can wire standard 4 lead RGBs in series can you?
--- End quote ---
Yes you can. You just need more than 5V. I use this LED calculator on the web. Ex: http://led.linear1.org/led.wiz
On a 5V line you can only get two 1.8-2.1 LEDs. To get more you would need to use a relay.

Hook the 5V output & ground from the PacLED64 to the coil of the relay. Then run a 12V line (spare drive power from the computer) through the common line in the relay and connect the LEDs to the NC (Normally Closed) pin on the Relay and the ground on the computer drive power. With the 12V from the computer, you won't have any chance of an milliamp overload issue either.

Links
http://en.wikipedia.org/wiki/Molex_connector#Disk_drive_connector_.28Molex_8981_Series_Power_Connector.29
http://en.wikipedia.org/wiki/Relay#Pole_and_throw

--- End quote ---

The above unfortunately like farting in an elevator, wrong on so many levels  ;D
It is not possible actually to connect RGB LEDs in series. Single LEDs yes, but RGB no, because one side of the 3 LEDs is commoned.
The PacLED does not have a 5V output, nor is it referenced to ground, and a relay would not work because no relay can switch on and off at the 100Khz output of the board. The board can already run at 12 volts anyway so all the above is unnecessary...Oh and the LED calculator is irrelevant because no resistors are needed with this board.

If using single LEDs, just connect 4 in series and to the board. No calculator or resistor needed. Power the board from 12 volts.

milhouse:
Quick Question...

Any idea if these would work?  I am having trouble finding a source for the headers (apart from Ebay), nor do I know whether there is a standard.  Thanks.

Brand New 20 Pin .100" Header Connector with Crimp Pin (2 pieces)

Crimp Pin included
 
Features
• Suitable for Female Pins
• Pins Lock Into Socket
• Current Rating up to 1A


Nephasth:

--- Quote from: milhouse on March 10, 2011, 04:44:48 pm ---Quick Question...

Any idea if these would work?  I am having trouble finding a source for the headers (apart from Ebay), nor do I know whether there is a standard.  Thanks.

Brand New 20 Pin .100" Header Connector with Crimp Pin (2 pieces)

Crimp Pin included
 
Features
• Suitable for Female Pins
• Pins Lock Into Socket
• Current Rating up to 1A

--- End quote ---

The board comes with connector housings even if you don't buy the harnesses. Here's what comes with the board:


--- Quote ---Kit Contents:

PacLED64 Board.
USB Cable
Power cable for connection to PC HDD power
2 x 48-way empty connector housings. Wires with crimp contacts (ordered separately if required) push into these.
--- End quote ---

And I think these will work with the supplied connector housings.

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