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LED Wiz wiring question
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scotthh:

--- Quote from: thatitalian on September 02, 2008, 09:18:04 am ---I thought this was the case. But if you are daisy chaining buttons surely the twisted parts would make contact with the ground (I assume this is for the ground connection?), wiht the nut on how can contact be made?

--- End quote ---

I'm trying really hard to figure out what you're talking about. By "Twisted Parts" do you mean wire?

When you use a wire nut you are connecting two wires AND insulating them from anything else. I would personally use wire nuts for electrical mains, but they seem like over-kill for an arcade panel. Crimping two wires into each quick disconnect or some electrical tape would be enough for me. If you do use wirenuts, make sure you get ones small enough for the wire you're using.

If you look at the Printed documentation the +5V is daisy chained. You want that reaching every LED.

The External Ground is wired separately, directly from the LED-Wiz controller and not the LEDs. See this article on ground.
thatitalian:

--- Quote from: scotthh on September 03, 2008, 12:45:44 am ---I'm trying really hard to figure out what you're talking about. By "Twisted Parts" do you mean wire?

When you use a wire nut you are connecting two wires AND insulating them from anything else.

--- End quote ---

Yes I mean the wire. I thought the whole point of daisy chaining is the connect one ground to the other. How can you do that if the twisted wire (the part that you connect to ground) is covered with a nut?

See my diagram below. On the left is a daisy chain connected to the ground of a button, and on the right is a wire nut daisy chain, but how do you connect that to the ground or to anything for that matter?

Maybe I am just missing something, in which case if I am I apologise for being a dumb *ss!
unclet:
I soldered wires to each of the LED nodes (with the resistor inline as well of course) and used shrink tubing to protect all the soldering points.   The wires coming from the LED lights are very thin and twisting them was not an option as they would most certainly break off.
scotthh:

--- Quote from: thatitalian on September 03, 2008, 07:03:35 am ---
See my diagram below. On the left is a daisy chain connected to the ground of a button, and on the right is a wire nut daisy chain, but how do you connect that to the ground or to anything for that matter?

Maybe I am just missing something, in which case if I am I apologise for being a dumb *ss!

--- End quote ---

Ah, now I SEE your question. Not dumb. Look more closely at the picture Games001 attached, there are 3 wires connected and twisted inside the wire nut.
arzoo:
Here's how I think the NovaGems need to be wired - each has two wires, one with a shrink wrapped resistor on the end. The wires with the resistors (cathode side of the LED) should be wired to the individual ports on the LED-Wiz. For reference, the individual ports are the ground side. The resistor leads may need to be trimmed shorter. The second wire from the NovaGem (anode side of the LED), the ones without the resistor, can all by twisted together and secured with a wire nut. You'll also need to add an additional extension wire from the twisted group which will connect to the 5v output on the LED-Wiz (see the pic Scotthh posted above).

The deal with the 5v jumper on the LED-Wiz is this - the USB connection to the LED-Wiz can only supply 500ma. If all the LEDs wired to the LED-Wiz draw less than 500ma, then you would leave the jumper in place and the common extension wire from your twisted group would connect to either side of the jumper. The jumper is heavy gauge, but you should still be able to add the additional connection. BUT, each NovaGem requires 100ma (wow) so if you have more than 5, you'll need to provide an additional +5v power source to the LED-Wiz. In this case, the jumper must be removed. You would then wire a +5v source from your computer to the X5v port on the LED-Wiz and a ground source from your computer to the G port on the LED-Wiz. The U5v port will be left unused. Finally, connect your common extension wire from your twisted group to the X5v port. I've included a diagram from Randy's documentation.

Hope this helps.
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