S
Shane Kirkman
Guest
Hi Doe's anyone know of a adjustable power supply circuit for a 12v
soldering iron.
Cheers Shane.
soldering iron.
Cheers Shane.
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P
Phil Allison
Guest
"Shane Kirkman"
Use a transformer with taps at 10, 12 and 15 volts like the DSE M2156.
Or, use a halogen light stepdown - electronic style if you like for
very light weight.
........... Phil
** IME 12 volt irons need every bit of heat they can muster.Hi Doe's anyone know of a adjustable power supply circuit for a 12v
soldering iron.
Use a transformer with taps at 10, 12 and 15 volts like the DSE M2156.
Or, use a halogen light stepdown - electronic style if you like for
very light weight.
........... Phil
S
Shane Kirkman
Guest
"Phil Allison" <philallison@tpg.com.au> wrote in message
news:2m1n5vFhtcseU1@uni-berlin.de...
Is a 12v iron controled by voltage or current. I am only learning
electronics.
news:2m1n5vFhtcseU1@uni-berlin.de...
2x6v 0v 2x110v."Shane Kirkman"
Hi Doe's anyone know of a adjustable power supply circuit for a 12v
soldering iron.
** IME 12 volt irons need every bit of heat they can muster.
Use a transformer with taps at 10, 12 and 15 volts like the DSE
M2156.
Or, use a halogen light stepdown - electronic style if you like
for
very light weight.
.......... Phil
Would A transfomer out of a 30 year old HMV tv be any good. It has 2x12v
Is a 12v iron controled by voltage or current. I am only learning
electronics.
M
Mikegw
Guest
mains stuff for the time being. It has a habit of making you dead. Can youWould A transfomer out of a 30 year old HMV tv be any good. It has 2x12v
2x6v 0v 2x110v.
Is a 12v iron controled by voltage or current. I am only learning
electronics.
Mate, if you are just learning I'd keep away from mucking around with the
get hold of a mains operated soldering iron? They are not that expensive
can be got from most places.
If you are begining I think it will be safe to say that the lack of a
temperature controlled soldering iron will not be the biggest of your
worries.
Mike
S
Shane Kirkman
Guest
"Mikegw" <mikegw20@spam.com.spam.hotmail> wrote in message
news:cdiogr$hu$1@tomahawk.unsw.edu.au...
supply, I just dont know what circuit to use. I also wanted to use a junked
transformer to save money.
news:cdiogr$hu$1@tomahawk.unsw.edu.au...
Thanks but I have been teaching myself for 12mths. I am up to making theWould A transfomer out of a 30 year old HMV tv be any good. It has 2x12v
2x6v 0v 2x110v.
Is a 12v iron controled by voltage or current. I am only learning
electronics.
Mate, if you are just learning I'd keep away from mucking around with the
mains stuff for the time being. It has a habit of making you dead. Can
you
get hold of a mains operated soldering iron? They are not that expensive
can be got from most places.
If you are begining I think it will be safe to say that the lack of a
temperature controlled soldering iron will not be the biggest of your
worries.
Mike
supply, I just dont know what circuit to use. I also wanted to use a junked
transformer to save money.
B
Bushy
Guest
To save money, use a cheap shop soldering iron. Macro warehouse, Supercheap
and several of the cheap shops have a range of soldering irons on special
regularly.
I have and use several cheap mains powered irons that were all under ten
dollars. They range from 25 watts, 40 watts to 80 watts and provide a good
range of heat capability for a wide range of joints. I also have a couple of
gas burners and a gas soldering iron that handle larger items like radiator
tanks.
I did "High Reliability Hand Soldering" many years ago as part of my
apprenticeship which was soldering all sorts of little joints to NASA
spec's. I have used a lot of different irons, from tiny little temperature
controlled ones, to scope irons, to oxy gear for big jobs.
The 12 volt iron you have, is it a 12 volt hook it up and it stays hot, or
is it the "Scope" brand 12 volt iron that only heats as you push the ring
switch? The hook it up and leave it will run pretty well on a transformer,
but the scope ones really need a big transformer as they draw a lot of
current while switched on and nothing on standby. Scope transformers are
normally about 3 volts and the 12 volt iron they sell is the same one with a
longer cable to limit the current with 12 volts. They burn out the element
frequently on 12 volts.
Transformers are normally rated at the rms voltage they maintain at the
rated current they will supply. Some manufacturers will give the open
circuit voltage. You will often find this figure will vary a little and
sometimes this will give a "suck it and see" method of testing if it will
provide enough juice to run the iron at the temperature you want.
If you have enough to gear to test the transformer insulation, or run it
through a safety switch, you will have a little protection for when the
insulation breaks down and gives you 240 volts on the soldering iron barrel
and tip. In fact, I consider it good practice to use a safety switch on the
supply line to all of your test bench equipment, especially including
anything under test. ('cause you already know it has at least one problem!)
The soldering iron will be quite happy with ac going to it, so you don't
need any fancy circuit unless you want to make some sort of variable
temperature control, but the iron you have will not have a sensor included.
I have re-used many transformers from old equipment over the years, and find
they are often good, but watch for any damage to them, and be prepared for
them to go bang and scare the crap out of you!
Hope this helps,
Peter
"Shane Kirkman" <shanekirkman@optusnet.com.au> wrote in message
news:40fced85$0$25459$afc38c87@news.optusnet.com.au...
and several of the cheap shops have a range of soldering irons on special
regularly.
I have and use several cheap mains powered irons that were all under ten
dollars. They range from 25 watts, 40 watts to 80 watts and provide a good
range of heat capability for a wide range of joints. I also have a couple of
gas burners and a gas soldering iron that handle larger items like radiator
tanks.
I did "High Reliability Hand Soldering" many years ago as part of my
apprenticeship which was soldering all sorts of little joints to NASA
spec's. I have used a lot of different irons, from tiny little temperature
controlled ones, to scope irons, to oxy gear for big jobs.
The 12 volt iron you have, is it a 12 volt hook it up and it stays hot, or
is it the "Scope" brand 12 volt iron that only heats as you push the ring
switch? The hook it up and leave it will run pretty well on a transformer,
but the scope ones really need a big transformer as they draw a lot of
current while switched on and nothing on standby. Scope transformers are
normally about 3 volts and the 12 volt iron they sell is the same one with a
longer cable to limit the current with 12 volts. They burn out the element
frequently on 12 volts.
Transformers are normally rated at the rms voltage they maintain at the
rated current they will supply. Some manufacturers will give the open
circuit voltage. You will often find this figure will vary a little and
sometimes this will give a "suck it and see" method of testing if it will
provide enough juice to run the iron at the temperature you want.
If you have enough to gear to test the transformer insulation, or run it
through a safety switch, you will have a little protection for when the
insulation breaks down and gives you 240 volts on the soldering iron barrel
and tip. In fact, I consider it good practice to use a safety switch on the
supply line to all of your test bench equipment, especially including
anything under test. ('cause you already know it has at least one problem!)
The soldering iron will be quite happy with ac going to it, so you don't
need any fancy circuit unless you want to make some sort of variable
temperature control, but the iron you have will not have a sensor included.
I have re-used many transformers from old equipment over the years, and find
they are often good, but watch for any damage to them, and be prepared for
them to go bang and scare the crap out of you!
Hope this helps,
Peter
"Shane Kirkman" <shanekirkman@optusnet.com.au> wrote in message
news:40fced85$0$25459$afc38c87@news.optusnet.com.au...
"Mikegw" <mikegw20@spam.com.spam.hotmail> wrote in message
news:cdiogr$hu$1@tomahawk.unsw.edu.au...
Would A transfomer out of a 30 year old HMV tv be any good. It has
2x12v
2x6v 0v 2x110v.
Is a 12v iron controled by voltage or current. I am only learning
electronics.
Mate, if you are just learning I'd keep away from mucking around with
the
mains stuff for the time being. It has a habit of making you dead. Can
you
get hold of a mains operated soldering iron? They are not that
expensive
can be got from most places.
If you are begining I think it will be safe to say that the lack of a
temperature controlled soldering iron will not be the biggest of your
worries.
Mike
Thanks but I have been teaching myself for 12mths. I am up to making the
supply, I just dont know what circuit to use. I also wanted to use a
junked
transformer to save money.