Build Your Own Arcade Controls Forum
Main => Main Forum => Topic started by: mark6437 on October 12, 2009, 09:37:00 am
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My friend and I installed the LED's and the LEDWIZ last night and we had a question. In the directions it says you need 100ohm resistors placed in line where it hooks up to the ledwiz numbered ports, not the 5v line(if that makes sense).
My friend knows electricity pretty good and he looked on the NovaGem LED's I got from GGG and he is saying it appears there is already a resistor on the LED board. He wanted me to ask if that really is a resistor and if so do we need to add extra resistors?
The part of the board I am talking about is just above the solder points. It is a small black recantgle chip that has 15R0 in white letters on top of it.
Thx
Mark
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The Nova Gem Coin Lamp/Switch connects to 5V directly so it has to have a dropping resister built in unlike the bare LEDs. I have 2 of the units and they work and look great.
The 100 ohm is just an example for an LED with a 3.2 voltage drop. Each different color LED has a different voltage drop so for example other resistors such as 150 ohm are used on other LEDs. If you are using separate or all in one RGB LEDs do the calculation on each separate color.
A typical RGB resistor Forward Voltage (RGB): (2.0, 3.2, 3.2)V
So GB use 100 ohms and R is 150 ohms.
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Ok so your saying those are resistors built onto the board??
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On the coin switch yes the resistor is on the LED board.
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Ok I confused. The coin switch?
The led's I have are the NovaGem pushbutton's. They all look exactly the same.
I dont recall ordering a coin switch LED?
Mark
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Sorry to confuse you I have the nova gem coin drop button which uses the same tech on the PCB
To quote the web site GGG about the nova gem regular PB switches
The new version uses a a custom PCB, similar to the RGB Drive. This allows for easier connection to the wires, as the resistor is now located on the PCB. The PCB fits between the microswitch holding legs of the pushbutton. To install, simply insert the LED into the hole in the bottom of the pushbutton body, and push to seat it fully in the hole. Be sure the PCB sits parallel to the bottom of the button, and that the PCB does not interfere with operation of the button. One of the wires will be marked in Red, which connects to a +5v DC source, while the other connects to ground or an output on a compatible lighting controller, such as the LED-Wiz.
Yes the resister is built in.
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Ok great! I sure appreciate the help!!
Mark