The Humble Altoids Tin Mod

[RicModMaker]

This is exactly what I was looking for, thankyou,
So if I built this mod would everything depend on Which battery I use, ? Such as whether or not I can go low ohms. Reason I ask is I'm already running an aerotank at 0.7 on my vtr.

You're welcome. You'd need to do the ohms law calculations to make sure the wire and switch could cope.
The wire I used was good for 21a but the switch says its only good for 10a. But, and this is not a fact, because the switch isn't on for long, I'd say it could take higher for short bursts. But 10a is pretty high and the calculations say that at 4.2v and 0.7ohms will draw 6a so well within the limits.

 

[BaDaBooM]

You're welcome. You'd need to do the ohms law calculations to make sure the wire and switch could cope.
The wire I used was good for 21a but the switch says its only good for 10a. But, and this is not a fact, because the switch isn't on for long, I'd say it could take higher for short bursts. But 10a is pretty high and the calculations say that at 4.2v and 0.7ohms will draw 6a so well within the limits.

Just to add to what seedy said, the switches can arc and weld shut, this is of course very uncommon but its good to know what can go wrong.

 

[robertgoldring]

Brill. Thankyou. Ill have a look at the calculations when I get it built. I know the wirew I ordered was 16 guage silicone wire. I think though that the switch was rated at 3amps.

 

[RicModMaker]

Brill. Thankyou. Ill have a look at the calculations when I get it built. I know the wirew I ordered was 16 guage silicone wire. I think though that the switch was rated at 3amps.

Like I said, switches have ratings but they are conservative I believe. Not that I know that but I think they can be pushed further than their rating. I'd be interested to here any info from anyone who has abused a switch and had success overloading it and any theories on what they can take. I know switches are all pretty unique but I'm sure some of the cheaper ones don't even get tested so they probably pull a number out of thin air.

 

[Chegs]

Like I said, switches have ratings but they are conservative I believe. Not that I know that but I think they can be pushed further than their rating. I'd be interested to here any info from anyone who has abused a switch and had success overloading it and any theories on what they can take. I know switches are all pretty unique but I'm sure some of the cheaper ones don't even get tested so they probably pull a number out of thin air.

I've never had a switch that handles more than it is rated for,I've had plenty switches that end up fucked from short-circuits and such and a few that failed simply because I was trying to draw too much.This is why I always include a mosfet in my builds,the mosfet blows in a short,and protects the switch from high current drain.

 

[RicModMaker]

I've never had a switch that handles more than it is rated for,I've had plenty switches that end up fucked from short-circuits and such and a few that failed simply because I was trying to draw too much.This is why I always include a mosfet in my builds,the mosfet blows in a short,and protects the switch from high current drain.

Agreed but you'd use nuclear power if you could I'm talking about pulling a bit over their rating like 5a through a 3a switch. They usually say something like 3a 125v so I'm thinking at lower voltage, they can be pushed a bit harder. I'm probably wrong, it has happened before

 

[BaDaBooM]

Agreed but you'd use nuclear power if you could I'm talking about pulling a bit over their rating like 5a through a 3a switch. They usually say something like 3a 125v so I'm thinking at lower voltage, they can be pushed a bit harder. I'm probably wrong, it has happened before

I talked to an electrical engineer (friend of the family) that worked on the Swedish Viggen fighter jets back in the 80's about vaping and asked him about switches and amp ratings, because I'm a total noob when it comes to stuff like this, he gave me a simple answer "amps are amps no matter the volts".

I usually go on the engineering forum for my electrical questions.

 

[RicModMaker]

I talked to an electrical engineer (friend of the family) that worked on the Swedish Viggen fighter jets back in the 80's about vaping and asked him about switches and amp ratings, because I'm a total noob when it comes to stuff like this, he gave me a simple answer "amps are amps no matter the volts".

I usually go on the engineering forum for my electrical questions.

it's still a slightly grey area for me as I don't quite understand how a switch can have different amp ratings for different voltages but I quite frequently see 250v and 125v amp ratings with different values for the same switch. It's always best to stay within guidelines but I wonder if some switches are tested.

 

[ElsaBubs]

can we squeeze a chip in there Seedy?

 

[RicModMaker]

can we squeeze a chip in there Seedy?

Easily but I think SX350s deserve a bit more than a £2 tin ;-)