hi, i need a variable power supply, to power a tattoo machine, has to be dc, 0-12 volts, would the circuit in the following link work, and would it need to be adapted for uk voltages?

http://www.science-projects.com/PowerSupply.htm

somebody told me you can make one from a wall wart power supply, because all of the parts are in there, is this correct?

thanks in advance!

 

The dimmer is NOT a reostat that varies voltage; instead it varies amperage by being what some call a wave cutter. This is important because this type of power supply will NOT vary the voltage, but it will - even more importantly - vary the milliamperage.

Well, it says right away that this circuit will NOT vary voltage. Also, if you're doing tattoo work, you're going to want a voltage supply that is very reliable and dependable . . . i wouldn't think that this is very reliable n dependable.

__________________
I'm no electronics god, i just talk too much.

 

Your question asks about a 0-12vdc power supply and your link is for 120v which do you need.. A wall wart will have a step down transformer in it, which you don't want if you need 120v. It may, or not, have diodes for rectification it all depends on which one you choose..

__________________
gerty

 

the tattoo machine runs between 3 - 12 volts
the power supply does, like a bench power supply i guess, check this link to see what i mean, i am in the uk btw, which makes a difference.

http://www.tattoo-supplies.co.uk/aca...cessories.html

but i want to make a much simpler looking power supply, just a dial, sockets, and a meter, like the power supply pictured...

 

[quote="jimmythefizz"]the tattoo machine runs between 3 - 12 volts
the power supply does, like a bench power supply i guess, check this link to see what i mean, i am in the uk btw, which makes a difference.

but i want to make a much simpler looking power supply, just a dial, sockets, and a meter, like the power supply pictured...
quote]

I would suggest you buy one of the power supplies off the link you posted, they are not too expensive, I suggest you would probably spend as much (if not more) building one yourself.

It's fairly obvious you're not at all experienced in electronics, simply by the first link you posted - whatever you do, don't ever think of using that! - it's ABSOLUTELY FATAL!. It's a light dimmer, not a variable power supply, and as such uses live mains! - I wouldn't like someone sticking needles in me, but I'd like it a damn sight less sticking needles with 230V in me!.

__________________
PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

 

i havent got a clue about electrnoics, I have a power supply, but was toying with the idea of making one, best leave such things alone then.

 

I think it's best, if you want to learn about electronics start with battery powered devices, leave mains alone until you gain a good amount of experience!.

__________________
PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

 

Hopefully it wasnt a typo and intended as torture power supply instead of tatoo power supply!

 

As already suggested or implied, it's probably best to purchase a ready made supply AND one that was made for the application. It's one thing to make an appliance and supply that might occasionally come into contact with someone - quite another (in my opinion) to do the same for something that will have a very low resistance contact on a regular basis. I'd like to think that the appliance that holds the needle is built to appropriate safety standards but it's safety might be quite dependent on the power supply.

__________________
stevez

 

most people i know use the altai units, or eikon, but some smaller suppliers are selling home made, sorry "workshop" made units, which is what i was looking at.