Beginners box

[vrga]

As the title says, i present to you my first mod. 4 2500mAh NiMH's, 1 holder, 2 led's, 2 resistors, 1 DPDT switch, 1 push-button, 1 510 thread, 2 screws, few globs of solder, 1 piece of PCB, 1 box of some industrial switching thing from who knows what or where (thoroughly cleansed)

Took me 6 hours to build from start to finish, no particular schematics or anything followed (but inspired by the general idea of the puck.), including drilling, dremeling, sawing, hot-glueing, finding the soggy tools, and other assorted hilarity with a coffee break thrown in for good measure.



Its ugly as sin, but hey, it works, has a "use" switch and a master switch, and corresponding indicator led's.

Imgur gallery



[edit]why you break, attachment thingy?

 

[vrga]

you know guys, i wouldnt mind some criticism or anything

 

[Mike36609]

Cheers for your out of the box creativity and initiative. If it works, and you like it, is a successful build, but you are right, not the prettiest mod I have seen. I would think that the toggle switch will prove to be inconvenient.

Kudos mate!

 

[vrga]

Well, the big problem in the box turned out to be the batteries. After a while, the voltage starts sagging like mad. (4 batteries in series drop to below 2V, you got a problem )

Time to read up on how to manage big current draws on batteries

 

[vrga]

In other news, this now holds up nicely to abuse and i've rewound the coils on some atty's i had. boy does the vanilla flavour get awesome on this. cotton pad wicks also probably helped there, but 3.4-ish Ohm helped too. with 2.6Ohm and fresh batteries i ended up with vapor way too hot for my tastes.

Anyone have a reliable way to measure such low resistances without getting into specialty ohmmeters?

 

[Relayer1974]

A cheap multimeter will give you plenty of accuracy. As for the batteries, I haven't had sags even near 2V on my NiMH units. I use Energizer NiMH AAs, in 2300mAh and 1400mAh. They'll sag to about 3-ish volts at the end of their useful charge cycle. I get 1.5-2 days out of my 2300s and about a day out of the 1400s. I'm getting really spoiled by regulated mods because I get a good vape until the very end.

 

[Relayer1974]

As for the unit itself, I really like it. The toggle switch and rubber bands are awesome. Why did you opt for a DPDT switch?

 

[vrga]

A cheap multimeter will give you plenty of accuracy.

You'd think that, but i'm having a hard time getting stable readings with the cheapass digital ones. Managed to dig out the ye olde analog one for those measurements.

As for the batteries, I haven't had sags even near 2V on my NiMH units.

It turned out to be a bum set.

I use Energizer NiMH AAs, in 2300mAh and 1400mAh. They'll sag to about 3-ish volts at the end of their useful charge cycle. I get 1.5-2 days out of my 2300s and about a day out of the 1400s. I'm getting really spoiled by regulated mods because I get a good vape until the very end.

Thinking of getting this set up for regulated wattage as well. Need to rummage through the random IC box for stuff.

As for the unit itself, I really like it. The toggle switch and rubber bands are awesome.

Thank you

Why did you opt for a DPDT switch?

Old habit of disconnecting the power supply completely when i want it to be off.