I just got the 89Sabers Kylo Ren hilt and the button PCB has button1, button2, 2 positives, and 2 negatives.
I haven’t worked on a button PCB that has positives yet and I’m unsure how to hook it up.
Any help is much appreciated!
Presumably the + and - go to LEDs?
Generally, when you get a PCB from someone, they should provide instructions for how to use it.
It does have LEDs.
Obviously the button 1 and 2 go to their respective pads but I’m not sure about the positive and negative.
Would the negative have to be driven by the MOSFETs and would the positive be hooked up to board positive or to the 3.3v pad?
Short answer is yes. You could probably drive it off the battery, but you would need an additional resistor. I have an 89sabers sidious i am working on and i think they have the same led button pcb. It is pre resistored.
I would try to reachbiut tothe seller and ask the question.
You may be able to use the 3.3v pad.
You may be able to use the Free* pads.
It depends on how much voltage the LEDs want, and if they have resistors or not already. (And if they have resistors, what voltage are they resistored for?)
89sabers should know what voltage the +/- pads are mean to receive.
This is a picture of the PCB.
The resistors aren’t labeled and there is 1 resistor per and 4 LEDs per button.
You can measure the resistors, and you can also measure the forward voltage of the LEDs. (Assuming your multimeter has that function.)
Have you tried reaching out to 89sabers?
I bought it from a reseller (Saberbay) so I’m not sure if 89sabers will respond to me cause I don’t have an order number or anything.
Saberbay will absolutely help you out. Give them an email.
He worked with 89 and me when I ordered a hilt and it was missing some parts.
How do you do this?
Your multimeter will have a special mode, called VF, or it may just have a diode symbol. Switch to that, measure the diode and the multimeter will tell you the forward voltage of your diode. (Works for LEDs and regular diodes.)
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