Running LED from Mains power

Charlie+ · Jul 16, 2009

On Wed, 15 Jul 2009 22:29:49 +1200, greg <greg@cosc.canterbury.ac.nz> wrote
as underneath my scribble :

Well the reason for my OP was to replace a blown large blue hungry bulb in
an insect killer unit - hence the requested for max output rather than just
an indicator. I have done a lashup running from a battery and it works
fine. Blue hiBright LED @~ 40 mA aimed at a pointed reflective white paper
cone!

What is this LED going to be used for?

If it's just a power indicator for a piece of mains
equipment, it may be easier and safer to use a
neon bulb and series resistor. You can get these as
a pre-made unit designed for exactly that application.

Charlie+ · Jul 16, 2009

On Wed, 15 Jul 2009 08:32:42 -0400, default <default@defaulter.net> wrote as
underneath my scribble :

thanks for that - pity a few lines are unreadable!
See also
http://www.marcspages.co.uk/tech/6103.htm
for a well worked out circuit!
Charlie+

I'll try putting the page up on alt.binaries.schematics.electronic

Phil Allison · Jul 16, 2009

"Charlie+" <charlie@xxx.net>

thanks for that - pity a few lines are unreadable!
See also
http://www.marcspages.co.uk/tech/6103.htm
for a well worked out circuit!

** As if a total moron like you would know !!!!!!

Same DANGEROUS and 100% STUPID cap rating fuckup as the one the
fuckhead Biasi puked here and we LAL told you about.

Piss off - IMBECILE !!

...... Phil

default · Jul 16, 2009

On Thu, 16 Jul 2009 10:28:33 +0100, Charlie+ <charlie@xxx.net> wrote:

On Wed, 15 Jul 2009 08:32:42 -0400, default <default@defaulter.net> wrote as
underneath my scribble :

thanks for that - pity a few lines are unreadable!
See also
http://www.marcspages.co.uk/tech/6103.htm
for a well worked out circuit!
Charlie+

I'll try putting the page up on alt.binaries.schematics.electronic

Sorry about that - looks like there's something hanging the toothed
belt in the scanner. Needs to be taken apart and cleaned.

I favor the bridge rectifier too. With the half wave circuit, you
need twice the cap for the same average current; the cap needs to be
larger physically, electrically, and cost more.
--

Charlie+ · Jul 16, 2009

On Thu, 16 Jul 2009 19:43:17 +1000, "Phil Allison" <phil_a@tpg.com.au> wrote
as underneath my scribble :

ABUSIVE PRICK _
FOD & PLONK!

** As if a total moron like you would know !!!!!!

Same DANGEROUS and 100% STUPID cap rating fuckup as the one the
fuckhead Biasi puked here and we LAL told you about.

Piss off - IMBECILE !!

..... Phil

Phil Allison · Jul 16, 2009

"Charlie+"

** I hope YOU get fucking ELECTROCUTED !!

ABUSIVE PRICK _
FOD & PLONK!

** As if a total moron like you would know !!!!!!

Same DANGEROUS and 100% STUPID cap rating fuckup as the one the
fuckhead Biasi puked here and we ALL told you about.

Piss off - IMBECILE !!

..... Phil

Richardson · Jul 16, 2009

"Tom Biasi" <tombiasi@optonline.net> wrote in message news:4a5b7bc8$0$5923$607ed4bc@cv.net...

"Charlie+" <charlie@xxx.net> wrote in message
news:f37m55p6cv4dc8jp6com8ie16oma481lnm@4ax.com...
On Mon, 13 Jul 2009 05:20:25 -0400, "Tom Biasi" <tombiasi@optonline.net>
wrote as underneath my scribble :

"Charlie+" <charlie@xxx.net> wrote in message
news1ol55l50rrt1usq529janj5vht8ipp6dv@4ax.com...
Reading the thread on battery power with interest...
Is there a minimal and cheap junk box circuit that anyone can recommend
for
running a (blue 25 to 40mA) LED at near its maximum output but from
mains
power - 230V ac in my case?
Thanks

Problems with AC mains is the voltage varies a lot and spikes are common.
The drop needed is large compared to the LED voltage.
Take a look at this circuit: http://www.turbokeu.com/myprojects/acled.htm

Tom
Thanks Tom!

Just wanted you to see how someone else did it.
I like Don's idea about the wall wart.
Some cell phone chargers have smart circuitry, you just want the voltage.

Tom

http://www.turbokeu.com/myprojects/acled.htm

Hey guys, your circuits above are fucked up, don't be offended. Most of you designers are technically incompetent, why?

For 230V:

1) Your resistor must be 50+watt to sustain the load (for a 32watt operation)

2) You very likely will blow your LEDs or your Zener.

For 110V (There is no such 110VAC, 120V yes, do your homework):

1) Your resistor must be 25+watt to sustain the load (for a 14.4watt operation)

2) You very likely will blow your LEDs or your Zener.

Next time before you call any one crackpot look at yourselves first. The falling of your housing market, GM, FORD and Chrysler for example... They are the result of your hypes....Don't you know?

Phil Allison · Jul 16, 2009

"Richardson"

** Son of a Dick ??

http://www.turbokeu.com/myprojects/acled.htm

Hey guys, your circuits above are fucked up, don't be offended. Most of
you designers are technically incompetent, why?

For 230V:

1) Your resistor must be 50+watt to sustain the load (for a 32watt
operation)

2) You very likely will blow your LEDs or your Zener.

For 110V (There is no such 110VAC, 120V yes, do your homework):

1) Your resistor must be 25+watt to sustain the load (for a 14.4watt
operation)

2) You very likely will blow your LEDs or your Zener.

Next time before you call any one crackpot look at yourselves first.

** Not when there are porfessionl crackpot like YOU who work for nothing.

We can al tell a bargain when we see one !!

BTW

What do you do for an encore???

Set your farts alight ????

...... Phil

petrus bitbyter · Jul 16, 2009

"Charlie+" <charlie@xxx.net> schreef in bericht
news

1ol55l50rrt1usq529janj5vht8ipp6dv@4ax.com...

Reading the thread on battery power with interest...
Is there a minimal and cheap junk box circuit that anyone can recommend
for
running a (blue 25 to 40mA) LED at near its maximum output but from mains
power - 230V ac in my case?
Thanks

Ever made a circuit like this:
___
+---|___|--+ +--+----+----+
| 330k| | | | |
| || | ___ | .-. | |
o---+----||----+-|___|---+ | | | | + |
|| 2k2/0.5W | | | | ### V
230V~ 220nF/250V~/X2 | .-----. | '-' --- -LED
+-| ~/ +|--+ |560 |10uF|
o--------------------------| / = |-----+----+----+
'-----'
created by Andy´s ASCII-Circuit v1.24.140803 Beta www.tech-chat.de

Which provides about 15mA to the LED. To double the current, replace the
capacitor by a 470nF part and the 2k2 resistor by a 1k/1W type. Be sure to
use an X2 rated type capacitor.

BTW. This capacitors are relatively big and expensive. I'd not be astonished
when a small transformer can compete.

petrus bitbyter

Hammy · Jul 16, 2009

On Thu, 16 Jul 2009 08:15:08 -0700, "Richardson" <member@newsguy.com>
wrote:

http://www.turbokeu.com/myprojects/acled.htm

Hey guys, your circuits above are fucked up, don't be offended. Most of you designers are technically incompetent, why?

For 230V:

1) Your resistor must be 50+watt to sustain the load (for a 32watt operation)

2) You very likely will blow your LEDs or your Zener.

For 110V (There is no such 110VAC, 120V yes, do your homework):

1) Your resistor must be 25+watt to sustain the load (for a 14.4watt operation)

2) You very likely will blow your LEDs or your Zener.

Next time before you call any one crackpot look at yourselves first. The falling of your housing market, GM, FORD and Chrysler for example... They are the result of your hypes....Don't you know?

A resistor isn't used to drop the excess voltage a capacitor is

(REACTANCE) V and I are out of phase so losses are minimal in the X2
cap for the 20 to 30mA. Do the math. The posted link is missing a
fuse and TVS an X2 cap should be used.

These PSU's are used quite a lot at low power levels.

I don't know where you are getting the 30W and 50W from? Only a
Chinese engineer would build a capacitive dropper at those power
levels.

Maybe you're the technically incompetent ass.

default · Jul 16, 2009

On Thu, 16 Jul 2009 10:43:12 -0700 (PDT), Greegor
<greegor47@gmail.com> wrote:

On Jul 16, 10:50 am, "petrus bitbyter"
pieterkraltlaatdit...@enditookhccnet.nl> wrote:
"Charlie+" <char...@xxx.net> schreef in berichtnews1ol55l50rrt1usq529janj5vht8ipp6dv@4ax.com...

Reading the thread on battery power with interest...
Is there a minimal and cheap junk box circuit that anyone can recommend
for
running a (blue 25 to 40mA) LED at near its maximum output but from mains
power - 230V ac in my case?
Thanks

Ever made a circuit like this:
___
+---|___|--+ +--+----+----+
| 330k| | | | |
| || | ___ | .-. | |
o---+----||----+-|___|---+ | | | | + |
|| 2k2/0.5W | | | | ### V
230V~ 220nF/250V~/X2 | .-----. | '-' --- -LED
+-| ~/ +|--+ |560 |10uF|
o--------------------------| / = |-----+----+----+
'-----'
created by Andy´s ASCII-Circuit v1.24.140803 Betawww.tech-chat.de

Which provides about 15mA to the LED. To double the current, replace the
capacitor by a 470nF part and the 2k2 resistor by a 1k/1W type. Be sure to
use an X2 rated type capacitor.

BTW. This capacitors are relatively big and expensive. I'd not be astonished
when a small transformer can compete.

petrus bitbyter

The ASCII diagram was not readable in my browser IE 8
but when cut and pasted into a word processor
it suddenly came into alignment.
The display should be fixed pitch (font) in the "newsreader" to see

the schematics.

Where is the - on the bridge rectifier, and what does the = mean?
That = should be the negative

--

Greegor · Jul 16, 2009

On Jul 16, 10:50 am, "petrus bitbyter"
<pieterkraltlaatdit...@enditookhccnet.nl> wrote:

"Charlie+" <char...@xxx.net> schreef in berichtnews1ol55l50rrt1usq529janj5vht8ipp6dv@4ax.com...

Reading the thread on battery power with interest...
Is there a minimal and cheap junk box circuit that anyone can recommend
for
running a (blue 25 to 40mA) LED at near its maximum output but from mains
power - 230V ac in my case?
Thanks

Ever made a circuit like this:
___
+---|___|--+ +--+----+----+
| 330k| | | | |
| || | ___ | .-. | |
o---+----||----+-|___|---+ | | | | + |
|| 2k2/0.5W | | | | ### V
230V~ 220nF/250V~/X2 | .-----. | '-' --- -LED
+-| ~/ +|--+ |560 |10uF|
o--------------------------| / = |-----+----+----+
'-----'
created by Andy´s ASCII-Circuit v1.24.140803 Betawww.tech-chat.de

Which provides about 15mA to the LED. To double the current, replace the
capacitor by a 470nF part and the 2k2 resistor by a 1k/1W type. Be sure to
use an X2 rated type capacitor.

BTW. This capacitors are relatively big and expensive. I'd not be astonished
when a small transformer can compete.

petrus bitbyter

The ASCII diagram was not readable in my browser IE 8
but when cut and pasted into a word processor
it suddenly came into alignment.

Where is the - on the bridge rectifier, and what does the = mean?

petrus bitbyter · Jul 16, 2009

"default" <default@defaulter.net> schreef in bericht
news:0otu551ekv6s2p5gss5tkodriupf57afh1@4ax.com...

On Thu, 16 Jul 2009 10:43:12 -0700 (PDT), Greegor
greegor47@gmail.com> wrote:

On Jul 16, 10:50 am, "petrus bitbyter"
pieterkraltlaatdit...@enditookhccnet.nl> wrote:
"Charlie+" <char...@xxx.net> schreef in
berichtnews1ol55l50rrt1usq529janj5vht8ipp6dv@4ax.com...

Reading the thread on battery power with interest...
Is there a minimal and cheap junk box circuit that anyone can
recommend
for
running a (blue 25 to 40mA) LED at near its maximum output but from
mains
power - 230V ac in my case?
Thanks

Ever made a circuit like this:
___
+---|___|--+ +--+----+----+
| 330k| | | | |
| || | ___ | .-. | |
o---+----||----+-|___|---+ | | | | + |
|| 2k2/0.5W | | | | ### V
230V~ 220nF/250V~/X2 | .-----. | '-' --- -LED
+-| ~/ +|--+ |560 |10uF|
o--------------------------| / = |-----+----+----+
'-----'
created by Andy´s ASCII-Circuit v1.24.140803 Betawww.tech-chat.de

Which provides about 15mA to the LED. To double the current, replace the
capacitor by a 470nF part and the 2k2 resistor by a 1k/1W type. Be sure
to
use an X2 rated type capacitor.

BTW. This capacitors are relatively big and expensive. I'd not be
astonished
when a small transformer can compete.

petrus bitbyter

The ASCII diagram was not readable in my browser IE 8
but when cut and pasted into a word processor
it suddenly came into alignment.
The display should be fixed pitch (font) in the "newsreader" to see
the schematics.

Where is the - on the bridge rectifier, and what does the = mean?
That = should be the negative
--

*** Display the post using a fixed width font like Courier. ***

So once more:

Ever made a circuit like this:
___
+---|___|--+ +--+----+----+
| 330k| | | | |
| || | ___ | .-. | |
o---+----||----+-|___|---+ | | | | + |
|| 2k2/0.5W | | | | ### V
230V~ 220nF/250V~/X2 | .-----. | '-' --- -LED
+-| ~/ +|--+ |560 |10uF|
o--------------------------| /= |-----+----+----+
'-----'
created by Andy´s ASCII-Circuit v1.24.140803 Beta www.tech-chat.de

Which provides about 15mA to the LED. To double the current, replace the
capacitor by a 470nF part and the 2k2 resistor by a 1k/1W type. Be sure to
use an X2 rated type capacitor.

BTW. This capacitors are relatively big and expensive. I'd not be astonished
when a small transformer can compete.

petrus bitbyter

Michael A. Terrell · Jul 16, 2009

default wrote:

On Thu, 16 Jul 2009 10:43:12 -0700 (PDT), Greegor
greegor47@gmail.com> wrote:

On Jul 16, 10:50 am, "petrus bitbyter"
pieterkraltlaatdit...@enditookhccnet.nl> wrote:
"Charlie+" <char...@xxx.net> schreef in berichtnews1ol55l50rrt1usq529janj5vht8ipp6dv@4ax.com...

Reading the thread on battery power with interest...
Is there a minimal and cheap junk box circuit that anyone can recommend
for
running a (blue 25 to 40mA) LED at near its maximum output but from mains
power - 230V ac in my case?
Thanks

Ever made a circuit like this:
___
+---|___|--+ +--+----+----+
| 330k| | | | |
| || | ___ | .-. | |
o---+----||----+-|___|---+ | | | | + |
|| 2k2/0.5W | | | | ### V
230V~ 220nF/250V~/X2 | .-----. | '-' --- -LED
+-| ~/ +|--+ |560 |10uF|
o--------------------------| / = |-----+----+----+
'-----'
created by Andy´s ASCII-Circuit v1.24.140803 Betawww.tech-chat.de

Which provides about 15mA to the LED. To double the current, replace the
capacitor by a 470nF part and the 2k2 resistor by a 1k/1W type. Be sure to
use an X2 rated type capacitor.

BTW. This capacitors are relatively big and expensive. I'd not be astonished
when a small transformer can compete.

petrus bitbyter

The ASCII diagram was not readable in my browser IE 8
but when cut and pasted into a word processor
it suddenly came into alignment.
The display should be fixed pitch (font) in the "newsreader" to see
the schematics.

'Google Groups' defaults to proportional spacing.

Where is the - on the bridge rectifier, and what does the = mean?
That = should be the negative
--

--
You can't have a sense of humor, if you have no sense!

Winston · Jul 17, 2009

"Tom Biasi" <tombiasi@optonline.net> wrote:

http://www.turbokeu.com/myprojects/acled.htm

Slick! Thanks Tom!

--Winston

AmericanS_Jerk · Jul 17, 2009

"Phil Allison" <phil_a@tpg.com.au> wrote in message news:7c8v1kF26hjhjU1@mid.individual.net...

"Richardson"

** Son of a Kickbutt ??

http://www.nigeriansinamerica.com/articles/3262/1/The-Unraveling-of-the-Great-American-Scamwhere-is-CNN-Now/Page1.html

Hey guys, your circuits above are fucked up, don't be offended. Most of
you designers are technically incompetent, why?

For 230V:

1) Your resistor must be 50+watt to sustain the load (for a 32watt
operation)

2) You very likely will blow your LEDs or your Zener.

For 110V (There is no such 110VAC, 120V yes, do your homework):

1) Your resistor must be 25+watt to sustain the load (for a 14.4watt
operation)

2) You very likely will blow your LEDs or your Zener.

Next time before you call any one crackpot look at yourselves first.

** Not when there are porfessionl crackpot like YOU who work for nothing.

We can al tell a bargain when we see one !!

Right Like your Falling $$Dollar, falling housing market, falling Automobile? That's how you Dumbfucks think of yourselves too high and backward.

CNN is right "Your Test score is way below World's Average"

You can't compute, you can't see your flaw, you assume then you publish your junk on the internet to teach each other. You better test your circuit before you embarrass yourself idiot.

BTW

What do you do for an encore???

Set your farts alight ????

..... Phil, I eat shit and I publish shit to teach other American to follow my steps.

Rich Grise · Jul 17, 2009

On Thu, 16 Jul 2009 23:01:19 +0200, petrus bitbyter wrote:

"default" <default@defaulter.net> schreef in bericht

Where is the - on the bridge rectifier, and what does the = mean?
That = should be the negative
--

So once more:

Ever made a circuit like this:
___
+---|___|--+ +--+----+----+
| 330k| | | | |
| || | ___ | .-. | |
o---+----||----+-|___|---+ | | | | + |
|| 2k2/0.5W | | | | ### V
230V~ 220nF/250V~/X2 | .-----. | '-' --- -LED
+-| ~/ +|--+ |560 |10uF|
o--------------------------| /= |-----+----+----+
'-----'
created by Andy´s ASCII-Circuit v1.24.140803 Beta www.tech-chat.de

Which provides about 15mA to the LED. To double the current, replace the
capacitor by a 470nF part and the 2k2 resistor by a 1k/1W type. Be sure to
use an X2 rated type capacitor.

BTW. This capacitors are relatively big and expensive. I'd not be astonished
when a small transformer can compete.

I once bought a batch of ultra-cute little transformers from Mouser:
http://www.mouser.com/Search/Refine.aspx?N=254453&Keyword=41Pg006&FS=True

12VCT, 60 mA, $2.76 in onesies. about 1.5 cubic inches. (just a little
bigger than my thumb.)

Good Luck!
Rich

David Eather · Jul 17, 2009

Rich Grise wrote:

On Thu, 16 Jul 2009 23:01:19 +0200, petrus bitbyter wrote:
"default" <default@defaulter.net> schreef in bericht
Where is the - on the bridge rectifier, and what does the = mean?
That = should be the negative
--
So once more:

Ever made a circuit like this:
___
+---|___|--+ +--+----+----+
| 330k| | | | |
| || | ___ | .-. | |
o---+----||----+-|___|---+ | | | | + |
|| 2k2/0.5W | | | | ### V
230V~ 220nF/250V~/X2 | .-----. | '-' --- -LED
+-| ~/ +|--+ |560 |10uF|
o--------------------------| /= |-----+----+----+
'-----'
created by Andy´s ASCII-Circuit v1.24.140803 Beta www.tech-chat.de

Which provides about 15mA to the LED. To double the current, replace the
capacitor by a 470nF part and the 2k2 resistor by a 1k/1W type. Be sure to
use an X2 rated type capacitor.

BTW. This capacitors are relatively big and expensive. I'd not be astonished
when a small transformer can compete.

I once bought a batch of ultra-cute little transformers from Mouser:
http://www.mouser.com/Search/Refine.aspx?N=254453&Keyword=41Pg006&FS=True

12VCT, 60 mA, $2.76 in onesies. about 1.5 cubic inches. (just a little
bigger than my thumb.)

Good Luck!
Rich

I bet the iron losses in the transformer were still around 10ma. i.e. no
improvement on driving the led direct from the mains

Roger_Nickel · Jul 18, 2009

On Thu, 16 Jul 2009 22:53:03 -0700, Winston wrote:

"Tom Biasi" <tombiasi@optonline.net> wrote:

http://www.turbokeu.com/myprojects/acled.htm

Slick! Thanks Tom!

--Winston

Fairly standard circuit which works well. The capacitor across the mains
should be VDE or UL rated for mains duty--able to pass a high voltage
flash test, and failing safe when it does fail.

default · Jul 18, 2009

On Fri, 17 Jul 2009 18:08:14 GMT, Rich Grise <richgrise@example.net>
wrote:

On Thu, 16 Jul 2009 23:01:19 +0200, petrus bitbyter wrote:
"default" <default@defaulter.net> schreef in bericht

Where is the - on the bridge rectifier, and what does the = mean?
That = should be the negative
--

So once more:

Ever made a circuit like this:
___
+---|___|--+ +--+----+----+
| 330k| | | | |
| || | ___ | .-. | |
o---+----||----+-|___|---+ | | | | + |
|| 2k2/0.5W | | | | ### V
230V~ 220nF/250V~/X2 | .-----. | '-' --- -LED
+-| ~/ +|--+ |560 |10uF|
o--------------------------| /= |-----+----+----+
'-----'
created by Andy´s ASCII-Circuit v1.24.140803 Beta www.tech-chat.de

Which provides about 15mA to the LED. To double the current, replace the
capacitor by a 470nF part and the 2k2 resistor by a 1k/1W type. Be sure to
use an X2 rated type capacitor.

BTW. This capacitors are relatively big and expensive. I'd not be astonished
when a small transformer can compete.

I once bought a batch of ultra-cute little transformers from Mouser:
http://www.mouser.com/Search/Refine.aspx?N=254453&Keyword=41Pg006&FS=True

12VCT, 60 mA, $2.76 in onesies. about 1.5 cubic inches. (just a little
bigger than my thumb.)

Good Luck!
Rich
see the description?

Heavy Duty Power Transformers XFMR FIL

Under that the word "big"

"do to size or weight, this product disqualifies the order for
discounted shipping rates outside . . . "

How big is that thumb of yours anyhow?
--

Running LED from Mains power

Charlie+

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