Wiring diagram for a NBV4 with extender?

[darthdarth]

Hi guys,

Finally got all the material (and time available, so I started the build.

I did mount the LED and the inner frame, The battery is in and I did put together the recharge port; so now I have basically all the wires ready to connect the board.

- Speaker wires
- Activation button wires
- Accent LED wires
- main LED wires (3 + 1 for the ground, which I tied together So I have one wire coming in from the LED assembly)
- Power wires coming from the recharge port.

Connection should be straightforward, since I tie all the negative together, which goes to the negative pad of the board; speaker wires go to the speaker pads, the activation button to the activation pad, and the accent LED goes to the small pad in the middle of the board (the one marked for the accent LED in various diagrams, not the 3.3V pad, otherwise I need the kill key because that LED would suck up the battery even when the board is turned off)

Now, from my understanding, the extender goes on the 3rd pad, which is the one used for the FOC feature; although I am not sure about how to connect it; does anyone have a pre-made working schematic that I can look at, to get an idea? Thanks!

[Tom Tilmon]

pxtendr delete.jpg

Looks like negative and activation switch run through xtender from nbIV manual.

Tom

[darthdarth]

I thought that diagram was wrong, when I was looking at the manual.
Not sure why it has to go through the activation switch; I want to be sure that I do this right, since there is no turning back

[darthdarth]

This is what I did plan; not sure if that's how it should be though...

test.jpg

In many examples, I see people setting up the positives together, instead of the negatives, which is weird to me. I am no hardware engineer but all the circuits that I have seen using Arduino for example, were showing that the signal is the positive.

Maybe the NBV4 is different and does not carry any voltage on their pads, beside the power one? Althought this is also weird, since a pin can be either high or low; so this means either there is full current passing through it, or none (unless you have PWM pins).

Trying to understand how this thing works

[Jay-gon Jinn]

The switch ground doesn't have to run through the power extender, it merely needs to return to the battery ground, which would be either on the battery/cell itself, the post on your recharge port if you have one, or through the ground on the PEx. Wiring it to the PEx may save you on space with your wiring, reducing the possibility of "spaghetti wiring" your saber.

[darthdarth]

I see; I am not much into electronics; I mostly write programs for microcontrollers, leaving the wiring to the people that know that well

Does my schematics works or do I have to change something? I did connect the switch to the same wire that goes from the ground of the extender, to the negative, so I think I am doing what you suggested.