VV module inside an existing tube mod?

[VpnDrgn]

Ok, so my thought is, I have an existing tube mod. It is your standard
configuration with negative going through the body into the outside on connector
and positive going through switch into center of connector.

What I am wondering is, is it possible to inset a VV module into that positive
connection between the batt/batts and the switch?

Most diagrams I have seen show the switch in front of the VV circuit, is it possible
to put the switch after the VV circuit? Will that eat up power? Can you design a VV
module in a positive to positive connection?

Sorry, I can't draw diagrams right now. Lay it out like this -

Positive batt
|
positive in VV
VV circuit
Positive out VV
|
switch
|
Positive atty
negative atty
|
negative batt

I am thinking there will need to be a secondary negative for the circuit,
and in the case of the OKR, probably a secondary positive loop for the circuit.
The second positive loop for the circuit would be no problem for the module
platform I am thinking of, but the extra ground would probably eliminate
the "drop in module" aspect I am going for.

What do you guys think?

 

[bstedh]

Ok, so my thought is, I have an existing tube mod. It is your standard
configuration with negative going through the body into the outside on connector
and positive going through switch into center of connector.

What I am wondering is, is it possible to inset a VV module into that positive
connection between the batt/batts and the switch?

Most diagrams I have seen show the switch in front of the VV circuit, is it possible
to put the switch after the VV circuit? Will that eat up power? Can you design a VV
module in a positive to positive connection?

Sorry, I can't draw diagrams right now. Lay it out like this -

Positive batt
|
positive in VV
VV circuit
Positive out VV
|
switch
|
Positive atty
negative atty
|
negative batt

I am thinking there will need to be a secondary negative for the circuit,
and in the case of the OKR, probably a secondary positive loop for the circuit.
The second positive loop for the circuit would be no problem for the module
platform I am thinking of, but the extra ground would probably eliminate
the "drop in module" aspect I am going for.

What do you guys think?

I am trying to do something similar with an 18650 NoEgo. What I have come up with so far is in the "My first PWM circuit" thread. I am working on squeezing an OKR-T in there and will probably require sandwiching 1 or 2 additional circuit boards on top of it for the supporting circuitry and switch. I guess the big consideration is weather it is "drop in" or "built into"...

As far as the negative connection I am thinking of using positive ground and using a spring on the circuit board to push up against the body of the mod to pull a connection and then the negative would be where you would normally have the positive.

The boards would be connected to two end boards that would have the in and out connections.
Here are a couple of pictures of my ideas that I am kicking around and will continue to work on. I still have positioning and size issues to work out. especially with the POT.

 

[ChaosAffect]

I've played around with this a lot, actually tried an build one... The big problem here is the ground, of course. If you're talking about a mod like the Galileo (built a semi-working prototype of a VV module already) or the Megalodon, then a VV module is easy. Just screw it inline to the batteries, it's already grounded to the module tube, done.

The problem you're going to run into with a 'Universal' VV drop-in is going to be variance. All tubes are a little different, and your spring might not make good contact on all of them. Maybe a leaf-type spring coming out the side will work better, like a metal tab at a slight angle to the module.

 

[jrm850]

810-22-004-40-001101 Mill-Max Headers & Wire Housings

These would make a cute little ground for sliding a board in a tube. They are surface mount right angle so a couple soldered on the board edge would be perfect.

 

[VpnDrgn]

I see we are on the same wavelength Bstedh. Is your switch incorporated into the module because it
has to be in front of the VV circuit or because you are using it in the NoEgo?

My idea on the pot is to use the blue box kind with the post sticking up. The inside of the tube
could be notched so that module slides in with the post coming to rest under a hole to the outside.
The spring or leaf would work, but I worry about efficient conductance. I was thinking a small
wire soldered to the inside wall with a pin connector for the module.

Not really thinking universal ChaosAffect, would mostly focus on any mod that uses 18650's.
I have one mod in mind that uses two 18650's. Using two 18500's instead would leave enough
room for the VV module.

 

[boomer2506]

Like this?

 

[asdaq]

I think the evercool thread has a drop in unit for a GGTS. V-in on the bottom, V-out on the top, ground tab with tension on the side.