AC adapters

[P4C0]

Hello, I'm a bit tired of batteries, no matter what type they are they will die at some point and I'll like to minimize their use as much as possible.

My question is: does anyone know of a AC adapter than can output 3.7 volts (or close) at 2A ?

The only one I have found so far is this:
S15AA03325001: JAMECO RELIAPRO: Power Supplies & Wall Adapters

It's 3.3 Volts, do you think that will make a big difference compared to 3.7?

 

[misterD]

depends on the atty resistance.
Ohm's Law Calculator

 

[four2109]

2 amp AC to USB Adapter, ideal for Passthroughs

 

[WillyB]

Hello, I'm a bit tired of batteries, no matter what type they are they will die at some point and I'll like to minimize their use as much as possible.

My question is: does anyone know of a AC adapter than can output 3.7 volts (or close) at 2A ?

The only one I have found so far is this:
S15AA03325001: JAMECO RELIAPRO: Power Supplies & Wall Adapters

It's 3.3 Volts, do you think that will make a big difference compared to 3.7?

Is there a specific reason why you want a 3.7V supply? If you are trying to duplicate lets say a standard Joye e-cig, the adapter you listed should work fine.

 

[P4C0]

Yes, I have a 510. Thanks for the link 42109, I noticed there's a PT without an inline battery on that site that claims to output 3.7, is that for real?

It's out of stock, but does anyone knows where I can find something similar? I don't want to go to 5v and I don't want the inline battery

Cheers

 

[johnny bobcat]

How come you don't want to go with 5 volts?

 

[P4C0]

How come you don't want to go with 5 volts?

I think that will reduce the life of the 510 atty... no?

 

[misterD]

I think that will reduce the life of the 510 atty... no?

it might not if you keep it wet!
question for the experts
can one use a diode to drop the voltage at the source?

 

[ThePuck]

it might not if you keep it wet!
question for the experts
can one use a diode to drop the voltage at the source?

You can use a diode to drop the voltage about .6 to .7 volts per diode but... the diode will needs to be rated for the amperage of the circuit so most likely a diode that can handle 2 amps or more of current. It depends on your atty resistance and your voltage you are wanting to run that determines the current needed for the diode.

 

[misterD]

You can uses a diode to drop the voltage about .6 volts per diode but... the diode will need to be rated for the amperage of the circuit so most likely a diode that can handle 2 amps or more of current. It depends on your atty resistance and your voltage you are wanting to run that determines the current needed for the diode.

can i just stick that diode into the positive wire on a usb adapter and stick it into my power supply?

 

[ThePuck]

can i just stick that diode into the positive wire on a usb adapter and stick it into my power supply?

Sure as long as it is rated for the amperage you are going to pull.

This one should do the trick.... 6A pack of diodes

You want higher amps on the diodes since the forward voltage of most of these are low.

You can get it at radio shack and should be more than enough current for most e-cig applications.

Make sure the Anode is at the positive end if you are not used to working with diodes.

You could also put as many of these as you need in series to drop .6, 1.2, 1.8 etc... volts.

I would check the heat though when running it to make sure it's not getting hot. You may need to heat sink it if it does. Dropping .6 volts shouldn't make it heat up too much but I've not tested it so you may want to check.

 

[misterD]

another question for you, Puck! can i use a regulator/booster with POT (variable voltage PV) with an adapter as a source? it wouldn't fry the whole thing, right?
im making this PV that has a mini-USB to charge the Batt and if i take out the batt and charger circuit i can use it as a PV. it has a sliding switch to activate the booster and POT. would it be safe? thanks, man!

 

[ThePuck]

another question for you, Puck! can i use a regulator/booster with POT (variable voltage PV) with an adapter as a source? it wouldn't fry the whole thing, right?
im making this PV that has a mini-USB to charge the Batt and if i take out the batt and charger circuit i can use it as a PV. it has a sliding switch to activate the booster and POT. would it be safe? thanks, man!

Sure, as long as your AC adapter can supply more current than your consuming. All an AC adapter is, is a small transformer to step down 120 volts to lower voltage (like 3, 5,etc..), a bridge rectifier (4 diodes in a bridge circuit to turn AC into DC) and maybe a capacitor for buffering. That is what most consist of. So AC adapters are just mini power supplies.

You will just have to make sure that with the current that is gong to be pulled by your booster/regulator is not going to pull more than the adapter is rated for. The regulator itself will consume some current just by itself.

A two amp AC adapter may have enough to run the atty and regulator for most e-cig applications but since I don't have any specs on the booster/regulator I can only say it will most probably work.

Uusually AC adapters don't expolde or anything and the worst it will do is pop the diodes in the AC adapter but then it is usless after that, but a 2A AC adapter is pretty hefty so I think you may be alright. Some even have a small fuse in them that will blow if you pull too much.

Be careful though when playing with 2 Amps. Under the right circumstances, it could hurt you.