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| LED Wiz wiring questions (help randyt or anybody;)) |
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| RandyT:
--- Quote from: blind_dado on December 12, 2008, 04:01:32 pm ---Why does the +5v have to go to the LED Wiz at all? Can't it just go to the terminal block and bypass the LED Wiz entirerly? You don't even need the ground wire attached to the LED Wiz either, as I understand. I have my LED Wiz set up like that and it works fine. (See lower left of picture.) The LEDs are actually powered off of the single red wire in the center of the picture, which leads to a terminal block not pictured. --- End quote --- LEDs are non-inductive loads. Inductive loads are usually anything with a coil (electromagnet, relay, etc...) So if you are just running LEDs, you don't need to run the (+) side to the board. Running the ground is just good practice. This allows one to size the return line to the load, which can't be done effectively with only the USB cable as these may be, and usually are, designed for low current. RandyT |
| blind_dado:
Good to know! I'll run a ground line to the LED Wiz now. Luckily I have a ground line on a terminal block nearby, so it should be easy. FYI, The picture you have on the second page of the instructions that come with the LED Wiz, titled "Example showing proper wiring of an RGB and Standard LED," shows the LEDS wired to the "USB +5v Output" on the LED Wiz and nothing attached to the ground. But that is the opposite of what you have desribed in this thread, namely, getting the +5 volts directly from the PC and running a ground line to the LED Wiz. I found the instructions difficult to follow; maybe a better picture would help. |
| nailsn:
Do I need such a "terminal block", or is it sufficient if I would just chain the LEDs in a row with the red +5v cable? (like you do this when powering through the usb output from the LEDWiz) |
| blind_dado:
A terminal block just makes the daisy chaining a bit more neat. Electrically, it is the same as just twisting all the wires together. This is what my terminal block for power to the NovaGem LEDs looks like. The red wire on the left is the incoming +5v, and it sends power to all the other wires via the terminal block (costs a couple of bucks at Radio Shack). |
| Bonechip:
Heya Gang, So is this the correct format for connecting around 25-30 LED's? |
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