Wiring Inquiries

[JediMike6567]

Diagram.jpg

Questions:

1. For a stunt saber, is this a valid basic LED setup?
2. Does a b-puc replace a resistor, if so what are the benefits?
3. Why does a single LED pad have 2 positive and 2 negative terminals?
4. How are the terminals utilized when it is a 3–up LED Pad?
5. Is there a specific reason to use 3.7 Li-Ion batteries over standards (9V, AA’s, ETC)
6. Is it best to run battery voltage parallel or serial?

[jbkuma]

1. Yes
2. Yes, it gives constant current regardless of the voltage for even lighting, but it also requires a higher voltage (2 cell pack instead of 1) than simply using a battery and resistor.
3. convenience
4. Each LED will have it's one + and - pads. Usually you wire either common ground or common anode, depending on the build requirements, and wire each opposite pad of the LED separately with a separate resistor.
5. Best energy density (capacity to weight). A good Li-Ion has a 3400mah apacity, where as a AA has 2000mah, AAA is 800mah and 9v has no useful application here. Adding batteries in series only increases the voltage, not the capacity.
6. You should never run your batteries in parallel unless you purchased them that way. All of the bad things can happen.

[JediMike6567]

Excellent, thank you very much for the answers.

Does anyone have resources that elaborate on jbkuma's description of this wiring setup or a diagram?