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The only way to rectify a current without the drop of a diode is with a MOSFET. But then you have to provide control for the MOSFET. Might be able to do it simply with one of the switch outputs. Not thinking too clear right now, tired, didn't sleep well.
Wouldn't it be easier to just use a 3 position slide switch?
I found a Diode with only a 65mv forward voltage drop. Unfortunately it's $14.30.Wouldn't it be easier to just use a 3 position slide switch?
Too bad there is not 4 wires, 1 for off, 1 for just the red, 1 for the red and white and one for red and black; then it would work.
I dunno WTF you would use this thing for...bridging power sources?
Here's an idea. I have seen a few mods that have dual atomizers. You could run your VOUT to the red wire, one positive atty pin to the black wire and one positive atty pin to the white wire. Then in position 1 no atty would fire, in position 2 the atty with the white wire would fire, in position 3 both the attys would fire and in position 4 the atty with the black wire would fire.Why one would want two attys on one mod I do not know unless ofcourse you are using two cartos or atomizers with different flavors and want a quick change without changing over or I guess for double the vape of the same flavor.You know this is something I would not do, but like I said I have seen mods with dual attys, LOL.
You've studied that a lot more than I would.
You need a pull-up resistor between the gate and source. You never want to let the gate on a FET float. With the very high impedance a gate pin normally has, it can actually pick up enough stray voltage just from inductance in the wiring to flicker on and off partially. Also, like I said before, to use a MOSFET as a rectifier, you need to swap the drain and source. Otherwise, the body diode will conduct in in the direction you want to block.I'm not positive on the wiring for the switch since it has a wierd pole configuration.
10k would be fine. There's a pretty wide range you can use. You can actually go as high as 1Meg without issue. You don't want to go too low or you're wasting power for no reason.I understand what you're saying about the drain current on a MOSFET. There was a time (not all that long ago) I would have asked the same thing. I found out at some point that drain current can go either way and it makes no difference. It's only the body diode you have to consider. In fact, a MOSFET with the extra substrate tied to the source (all 3 pin MOSFETS are like this) is pretty much just a diode until you start applying gate-source voltage. Practically, the only difference between a P and N channel MOSFET is an N-channel requires a positive VGS to turn on and a P-channel requires a negative VGS to turn on. Also, the direction of the body diode is opposite in terms of drain and source.