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The reality is the 1 amp diode is there to limit the current through the transistor
base and so the collector which feeds the LED. So the 1amp diode is limiting the LED current.
** TOTAL CRAP YOU IDIOT
It senses battery charge current.
At a low enough value, the BJT will turn off and the LED go out.
You didn\'t understand a thing I wrote,
gnuarm.delusional MORON rote:
==========================
The reality is the 1 amp diode is there to limit the current through the transistor
base and so the collector which feeds the LED. So the 1amp diode is limiting the LED current.
** TOTAL CRAP YOU IDIOT
It senses battery charge current.
At a low enough value, the BJT will turn off and the LED go out.
You didn\'t understand a thing I wrote,
** It was full of ABSURD FUCKING CRAP
like you !!!
The reality is the 1 amp diode is there to limit the current through the transistor
base and so the collector which feeds the LED. So the 1amp diode is limiting the LED current.
** TOTAL CRAP YOU IDIOT
It senses battery charge current.
At a low enough value, the BJT will turn off and the LED go out.
You didn\'t understand a thing I wrote,
** It was full of ABSURD FUCKING CRAP
like you !!!
And yet you can\'t argue the facts
Whatever. I used to enjoy trying to reason with you
On Thu, 17 Feb 2022 14:51:37 -0000, Rick C <gnuarm.del...@gmail.com> wrote:
On Thursday, February 17, 2022 at 4:56:32 AM UTC-5, Commander Kinsey wrote:
On Thu, 17 Feb 2022 06:24:16 -0000, Rick C <gnuarm.del...@gmail.com> wrote:
On Wednesday, February 16, 2022 at 11:53:34 PM UTC-5, Commander Kinsey wrote:
On Wed, 16 Feb 2022 15:28:11 -0000, Rick C <gnuarm.del...@gmail.com> wrote:
Yes, exactly. That\'s why it was disingenuous to post about the switched supplies. Saying, \"nowadays they\'re electronic\" would appear to be saying the transformerless supplies are not in use which is not correct.
Never looked inside one in great detail. I assumed they were switched mode, since a £4 LED bulb from China is. Never tried looking inside a tiny one, like a plug in USB PSU.
The light bulb has to be a switched device. Transformerless units waste a fair amount of power. Lightbulbs need to be efficient as they consume a fair amount of power and they also need to regulate the current.
Actually I have an old one which is just a capacitor dropper. The capacitor recently exploded so I opened it up and replaced it with a larger one..
The lightbulbs are sold through retail establishments that expect a level of quality and safety.
I\'m not stupid enough to buy anything through an expensive retail establishment.
A typical wall wart isn\'t and doesn\'t regulate anything very well. The junk that are sold on the Internet are literally death traps. Watch one of Big Clive\'s tear-downs on various products. He finds dangerous stuff all the time.
https://www.youtube.com/c/Bigclive/videos
I\'ve watched a lot of his stuff, but I\'ve never had a problem with a cheapo Chinese USB supply like this: https://www.ebay.co.uk/itm/303876456847
Mind you I\'m not scared of electricity.
Yeah, sure. Enjoy.
I\'ve had several 240V shocks. That\'s all they are, a shock. Your muscles jump. Big fucking deal.
gnuarm.delusional MORON rote:
==========================
BEWARE : DELUSIONAL SCHIZO
The reality is the 1 amp diode is there to limit the current through the transistor
base and so the collector which feeds the LED. So the 1amp diode is limiting the LED current.
** TOTAL CRAP YOU IDIOT
It senses battery charge current.
At a low enough value, the BJT will turn off and the LED go out.
You didn\'t understand a thing I wrote,
** It was full of ABSURD FUCKING CRAP
like you !!!
And yet you can\'t argue the facts
** ROTFL - WHAT FUCKING FACTS ??????
You rabid,nut case loopy notions ARE NOT FACTS !!!!!!!!!!!!!!!!!!!!
Whatever. I used to enjoy trying to reason with you
** Whaaaaaaattttt ????
Go fuck your self - you despicable POS asshole.
On 2022-02-17, Rick C <gnuarm.del...@gmail.com> wrote:
On Thursday, February 17, 2022 at 7:01:03 AM UTC-5, Jasen Betts wrote:
On 2022-02-17, Rick C <gnuarm.del...@gmail.com> wrote:
Yes, exactly. That\'s why it was disingenuous to post about the switched supplies. Saying, \"nowadays they\'re electronic\" would appear to be saying the transformerless supplies are not in use which is not correct.
Never looked inside one in great detail. I assumed they were switched mode, since a £4 LED bulb from China is. Never tried looking inside a tiny one, like a plug in USB PSU.
The light bulb has to be a switched device. Transformerless units
waste a fair amount of power. Lightbulbs need to be efficient as they
consume a fair amount of power and they also need to regulate the
current.
They consume a few watts, tens at most. not a lot of power.
a capacitive dropper is inherently current limited.
\"A few watts\" in most light bulbs is a lot more than a cell phone charger puts out.
Phone charger 2.5W to 15W. LED lamp 3W to 30W. Same ballpark.
The purpose of LED light bulbs is to save power. Giving up 20% or
more to the dissipative elements in a dropper makes the bulb
significantly less efficient.
So does overdriving the LEDs, but they do that to save money.
where are you getting 20% ?
No one buys cell phone chargers by their efficiency.
Noone wants one that runs smoking hot. Everyone wants an efficient phone charger.
Being current limited is of no utility in this case. When that cheap capacitor in the cheap power supply fails, the output becomes high voltage frying devices and people. It only takes a few mA to stop the heart.
What are you on about now?
On Mon, 14 Feb 2022 15:13:04 -0800, dplatt@coop.radagast.org (Dave
Platt) wrote:
In article <op.1hjp1807mvhs6z@ryzen.lan>,
Commander Kinsey <CK1@nospam.com> wrote:
https://imgur.com/a/b8l5qKQ
Look at the circuit diagram. The positive of the battery is only connected through a capacitor.
How can a capacitor possibly pass DC current to allow the battery to charge?
I don\'t believe that it could.
My guess is that schematic misinterprets the nature of the yellow
disc. I suspect that it\'s not a capacitor at all, but is a
positive-temperature-coefficient thermistor - a \"soft fuse\". If the
output (to the battery) is accidentally short-circuited, the high
current flow through the PTC will cause it to heat up, increasing its
resistance, causing it to heat up even faster, causing its resistance
to increase even more... and thus limiting the current flow through
the short circuit. These PTCs usually have a \"hold current\" (which
they will allow to pass for an unlimited amount of time, at room
temperature) and a \"trip current\" which will heat them enough to cause
them to limit the current.
Since we don\'t have a profile view of this component and can\'t see
the markings, I can\'t tell for sure.
It is called \"resonant charging\" and the current is pulses - so it
DOES flow through the capacitors
see
https://www.researchgate.net/publication/327260616/figure/download/fig2/AS:664444522733570@1535427327725/Lossless-Resonant-Charging-Circuit.png
Or it could be a TPS as described here:
A transformerless power supply (TPS) is basically just a voltage
divider that takes the 115 or 220 VAC from your wall and divides it
down to whatever voltage you want. If that voltage needs to be DC, it
is rectified through a few diodes, and maybe regulated to a maximum
voltage but weâll get to that in a minute.
Normally, DC voltage dividers are made with a pair of resistors.
Combined, they define the current flowing through the path, and the
top resistor can then be chosen to drop the difference between the
input voltage and the desired output. If, in our case, that difference
is some one or two hundred volts, even if it only has to pass a few
tens of milliamps, that resistor is going to get hot fast.
A better component to use in the top of the divider is a capacitor,
with its reactance chosen to give the desired âresistanceâ at whatever
the mains frequency is where you live. For example, say you want 25
milliamps out at 5 V, and youâre in America and need to drop 110 V. R
= V / I = 4,400 O. Using the reactance of a capacitor, thatâs C = 1 /
(2 * pi * 60 Hz * 4400) = 0.6 µF. If you need more current, use a
larger capacitor, and vice-versa. Itâs that easy!
A fully elaborated TPS design requires a few more parts. For safety,
and to limit inrush current, a fuse and a one-watt current-limiting
resistor on the input are a good idea. A large-value discharge
resistor in parallel with the reactive capacitor will keep it from
holding its high voltage and shocking you when the circuit is
unplugged.
see
https://hackaday.com/2017/04/04/the-shocking-truth-about-transformerless-power-supplies/
On Tuesday, February 15, 2022 at 12:34:44 AM UTC-5, palli...@gmail.com wrote:
gnuarm.delusional MORON rote:
==========================
BEWARE : DELUSIONAL SCHIZO
The reality is the 1 amp diode is there to limit the current through the transistor
base and so the collector which feeds the LED. So the 1amp diode is limiting the LED current.
** TOTAL CRAP YOU IDIOT
It senses battery charge current.
At a low enough value, the BJT will turn off and the LED go out.
You didn\'t understand a thing I wrote,
** It was full of ABSURD FUCKING CRAP
like you !!!
And yet you can\'t argue the facts
** ROTFL - WHAT FUCKING FACTS ??????
You rabid,nut case loopy notions ARE NOT FACTS !!!!!!!!!!!!!!!!!!!!
Whatever. I used to enjoy trying to reason with you
** Whaaaaaaattttt ????
Go fuck your self - you despicable POS asshole.
Yuuuupppp. Of his meds again. Or maybe he\'s on the meths again? Hard to tell. But it is clear he is totally incapable of discussing anything rationally. I wonder how he keeps a roof over his head?
On Friday, February 18, 2022 at 2:06:28 AM UTC-5, Commander Kinsey wrote:
On Thu, 17 Feb 2022 14:51:37 -0000, Rick C <gnuarm.del...@gmail.com> wrote:
On Thursday, February 17, 2022 at 4:56:32 AM UTC-5, Commander Kinsey wrote:
On Thu, 17 Feb 2022 06:24:16 -0000, Rick C <gnuarm.del...@gmail.com> wrote:
On Wednesday, February 16, 2022 at 11:53:34 PM UTC-5, Commander Kinsey wrote:
On Wed, 16 Feb 2022 15:28:11 -0000, Rick C <gnuarm.del...@gmail..com> wrote:
Yes, exactly. That\'s why it was disingenuous to post about the switched supplies. Saying, \"nowadays they\'re electronic\" would appear to be saying the transformerless supplies are not in use which is not correct.
Never looked inside one in great detail. I assumed they were switched mode, since a £4 LED bulb from China is. Never tried looking inside a tiny one, like a plug in USB PSU.
The light bulb has to be a switched device. Transformerless units waste a fair amount of power. Lightbulbs need to be efficient as they consume a fair amount of power and they also need to regulate the current.
Actually I have an old one which is just a capacitor dropper. The capacitor recently exploded so I opened it up and replaced it with a larger one.
The lightbulbs are sold through retail establishments that expect a level of quality and safety.
I\'m not stupid enough to buy anything through an expensive retail establishment.
A typical wall wart isn\'t and doesn\'t regulate anything very well. The junk that are sold on the Internet are literally death traps. Watch one of Big Clive\'s tear-downs on various products. He finds dangerous stuff all the time.
https://www.youtube.com/c/Bigclive/videos
I\'ve watched a lot of his stuff, but I\'ve never had a problem with a cheapo Chinese USB supply like this: https://www.ebay.co.uk/itm/303876456847
Mind you I\'m not scared of electricity.
Yeah, sure. Enjoy.
I\'ve had several 240V shocks. That\'s all they are, a shock. Your muscles jump. Big fucking deal.
Wow! It\'s not often you find people who are so ignorant. You didn\'t have the electricity pass through your heart. If it goes in one finger and out another on the same hand, no big deal, but in one hand and out the other or in a hand and out the feet, you may end up a dead duck.
What is the lethal current, 10 mA or so?
You strike me as a particularly ignorant person. Willfully ignorant, you might say. Is that right?
On 2022-02-17, Rick C <gnuarm.deletethisbit@gmail.com> wrote:
On Thursday, February 17, 2022 at 7:01:03 AM UTC-5, Jasen Betts wrote:
On 2022-02-17, Rick C <gnuarm.del...@gmail.com> wrote:
Yes, exactly. That\'s why it was disingenuous to post about the switched supplies. Saying, \"nowadays they\'re electronic\" would appear to be saying the transformerless supplies are not in use which is not correct.
Never looked inside one in great detail. I assumed they were switched mode, since a £4 LED bulb from China is. Never tried looking inside a tiny one, like a plug in USB PSU.
The light bulb has to be a switched device. Transformerless units
waste a fair amount of power. Lightbulbs need to be efficient as they
consume a fair amount of power and they also need to regulate the
current.
They consume a few watts, tens at most. not a lot of power.
a capacitive dropper is inherently current limited.
\"A few watts\" in most light bulbs is a lot more than a cell phone charger puts out.
Phone charger 2.5W to 15W. LED lamp 3W to 30W. Same ballpark.
The purpose of LED light bulbs is to save power. Giving up 20% or
more to the dissipative elements in a dropper makes the bulb
significantly less efficient.
So does overdriving the LEDs, but they do that to save money.
where are you getting 20% ?
No one buys cell phone chargers by their efficiency.
Noone wants one that runs smoking hot. Everyone wants an efficient phone charger.
Being current limited is of no utility in this case. When that cheap capacitor in the cheap power supply fails, the output becomes high voltage frying devices and people. It only takes a few mA to stop the heart..
What are you on about now?
On Friday, February 18, 2022 at 7:31:04 AM UTC-5, Jasen Betts wrote:
On 2022-02-17, Rick C <gnuarm.del...@gmail.com> wrote:
On Thursday, February 17, 2022 at 7:01:03 AM UTC-5, Jasen Betts wrote:
On 2022-02-17, Rick C <gnuarm.del...@gmail.com> wrote:
Yes, exactly. That\'s why it was disingenuous to post about the switched supplies. Saying, \"nowadays they\'re electronic\" would appear to be saying the transformerless supplies are not in use which is not correct.
Never looked inside one in great detail. I assumed they were switched mode, since a £4 LED bulb from China is. Never tried looking inside a tiny one, like a plug in USB PSU.
The light bulb has to be a switched device. Transformerless units
waste a fair amount of power. Lightbulbs need to be efficient as they
consume a fair amount of power and they also need to regulate the
current.
They consume a few watts, tens at most. not a lot of power.
a capacitive dropper is inherently current limited.
\"A few watts\" in most light bulbs is a lot more than a cell phone charger puts out.
Phone charger 2.5W to 15W. LED lamp 3W to 30W. Same ballpark.
15W phone chargers are high end and typically cost a lot more and are built well. The cheap phone chargers are the ones that have the capacitive dropper design.
The purpose of LED light bulbs is to save power. Giving up 20% or
more to the dissipative elements in a dropper makes the bulb
significantly less efficient.
So does overdriving the LEDs, but they do that to save money.
where are you getting 20% ?
The resistors added to a capacitive dropper.
No one buys cell phone chargers by their efficiency.
Noone wants one that runs smoking hot. Everyone wants an efficient phone charger.
Lol. So how do you check that? Light bulbs have specific labeling on the package to tell you how many watts it uses and how many lumens it produces. Granted, many don\'t have a clue as to how to use those numbers, but for those who do they are there.
You poor troll-feeding senile idiot STILL didn\'t get it! <BG
Confirmed.
Your senility, yes!
Generating lame, profane insults is a common skill set. How\'s the pay?
On Fri, 18 Feb 2022 15:21:24 -0000, Rick C <gnuarm.del...@gmail.com> wrote:
On Friday, February 18, 2022 at 2:06:28 AM UTC-5, Commander Kinsey wrote:
On Thu, 17 Feb 2022 14:51:37 -0000, Rick C <gnuarm.del...@gmail.com> wrote:
On Thursday, February 17, 2022 at 4:56:32 AM UTC-5, Commander Kinsey wrote:
On Thu, 17 Feb 2022 06:24:16 -0000, Rick C <gnuarm.del...@gmail.com> wrote:
On Wednesday, February 16, 2022 at 11:53:34 PM UTC-5, Commander Kinsey wrote:
On Wed, 16 Feb 2022 15:28:11 -0000, Rick C <gnuarm.del...@gmail.com> wrote:
Yes, exactly. That\'s why it was disingenuous to post about the switched supplies. Saying, \"nowadays they\'re electronic\" would appear to be saying the transformerless supplies are not in use which is not correct.
Never looked inside one in great detail. I assumed they were switched mode, since a £4 LED bulb from China is. Never tried looking inside a tiny one, like a plug in USB PSU.
The light bulb has to be a switched device. Transformerless units waste a fair amount of power. Lightbulbs need to be efficient as they consume a fair amount of power and they also need to regulate the current.
Actually I have an old one which is just a capacitor dropper. The capacitor recently exploded so I opened it up and replaced it with a larger one.
The lightbulbs are sold through retail establishments that expect a level of quality and safety.
I\'m not stupid enough to buy anything through an expensive retail establishment.
A typical wall wart isn\'t and doesn\'t regulate anything very well.. The junk that are sold on the Internet are literally death traps. Watch one of Big Clive\'s tear-downs on various products. He finds dangerous stuff all the time.
https://www.youtube.com/c/Bigclive/videos
I\'ve watched a lot of his stuff, but I\'ve never had a problem with a cheapo Chinese USB supply like this: https://www.ebay.co.uk/itm/303876456847
Mind you I\'m not scared of electricity.
Yeah, sure. Enjoy.
I\'ve had several 240V shocks. That\'s all they are, a shock. Your muscles jump. Big fucking deal.
Wow! It\'s not often you find people who are so ignorant. You didn\'t have the electricity pass through your heart. If it goes in one finger and out another on the same hand, no big deal, but in one hand and out the other or in a hand and out the feet, you may end up a dead duck.
I\'ve had it in all directions. In one hand the hand gets warm, no muscles in your hand. One hand to the other, your arms do a Mexican wave, it\'s quite funny. Not painful at all.
What is the lethal current, 10 mA or so?
You strike me as a particularly ignorant person. Willfully ignorant, you might say. Is that right?
You\'re the ignorant one, it\'s 80mA (and only with a weak heart), why do you think breakers trip at 30mA? Which by the way means you cannot die if you have breakers. I have fuses because I\'m not a girl.
On Fri, 18 Feb 2022 12:13:35 -0000, Jasen Betts <usenet@revmaps.no-ip.org> wrote:
On 2022-02-17, Rick C <gnuarm.deletethisbit@gmail.com> wrote:
On Thursday, February 17, 2022 at 7:01:03 AM UTC-5, Jasen Betts wrote:
On 2022-02-17, Rick C <gnuarm.del...@gmail.com> wrote:
Yes, exactly. That\'s why it was disingenuous to post about the switched supplies. Saying, \"nowadays they\'re electronic\" would appear to be saying the transformerless supplies are not in use which is not correct.
Never looked inside one in great detail. I assumed they were switched mode, since a £4 LED bulb from China is. Never tried looking inside a tiny one, like a plug in USB PSU.
The light bulb has to be a switched device. Transformerless units
waste a fair amount of power. Lightbulbs need to be efficient as they
consume a fair amount of power and they also need to regulate the
current.
They consume a few watts, tens at most. not a lot of power.
a capacitive dropper is inherently current limited.
\"A few watts\" in most light bulbs is a lot more than a cell phone charger puts out.
Phone charger 2.5W to 15W. LED lamp 3W to 30W. Same ballpark.
A phone battery is 4V. 15 W would be charging it at 4A, you\'d get an explosion.
The purpose of LED light bulbs is to save power. Giving up 20% or
more to the dissipative elements in a dropper makes the bulb
significantly less efficient.
So does overdriving the LEDs, but they do that to save money.
It doesn\'t save money. I bought Cree (shittest company ever) bulbs, they lasted 1 month due to getting so fucking hot they couldn\'t be touched comfortably for even half a second. I sent them back 5 times, costing them a fortune.
 Why would would you call it a jibe at you, have you ever postedamdx wrote:
==============
He asked a reasonable, on-topic for S.E.D. question.
** No he didn\'t.
Next he posted a pile of hostile & absurd bullshit.
Just like YOU do.
It may be a PTC thermistor current limiter.
** No fooling.......................
No one here ever ever though of that - did they ?
Yeah, I don\'t know why anyone would think it was acceptable to post \"hostile bullshit\" in s.e.d.
** So WHY do * YOU * ALL THE TIME ?????
Rhetorical Q - fuckhead
Phil, that one sailed right over your head,
** Totally wrong - you illiterate moron.
The jibe was at ME you fool.
On Tue, 15 Feb 2022 06:04:34 -0000, Clare Snyder <cl...@snyder.on.ca> wrote:
On Mon, 14 Feb 2022 15:13:04 -0800, dpl...@coop.radagast.org (Dave
Platt) wrote:
In article <op.1hjp1...@ryzen.lan>,
Commander Kinsey <C...@nospam.com> wrote:
https://imgur.com/a/b8l5qKQ
Look at the circuit diagram. The positive of the battery is only connected through a capacitor.
How can a capacitor possibly pass DC current to allow the battery to charge?
I don\'t believe that it could.
My guess is that schematic misinterprets the nature of the yellow
disc. I suspect that it\'s not a capacitor at all, but is a
positive-temperature-coefficient thermistor - a \"soft fuse\". If the
output (to the battery) is accidentally short-circuited, the high
current flow through the PTC will cause it to heat up, increasing its
resistance, causing it to heat up even faster, causing its resistance
to increase even more... and thus limiting the current flow through
the short circuit. These PTCs usually have a \"hold current\" (which
they will allow to pass for an unlimited amount of time, at room
temperature) and a \"trip current\" which will heat them enough to cause
them to limit the current.
Since we don\'t have a profile view of this component and can\'t see
the markings, I can\'t tell for sure.
It is called \"resonant charging\" and the current is pulses - so it
DOES flow through the capacitors
see
https://www.researchgate.net/publication/327260616/figure/download/fig2/AS:664444522733570@1535427327725/Lossless-Resonant-Charging-Circuit.png
Nowhere in there does the current for the load have to pass through a capacitor.
Or it could be a TPS as described here:
A transformerless power supply (TPS) is basically just a voltage
divider that takes the 115 or 220 VAC from your wall and divides it
down to whatever voltage you want. If that voltage needs to be DC, it
is rectified through a few diodes, and maybe regulated to a maximum
voltage but weâll get to that in a minute.
Normally, DC voltage dividers are made with a pair of resistors.
Combined, they define the current flowing through the path, and the
top resistor can then be chosen to drop the difference between the
input voltage and the desired output. If, in our case, that difference
is some one or two hundred volts, even if it only has to pass a few
tens of milliamps, that resistor is going to get hot fast.
A better component to use in the top of the divider is a capacitor,
with its reactance chosen to give the desired âresistanceâ at whatever
the mains frequency is where you live. For example, say you want 25
milliamps out at 5 V, and youâre in America and need to drop 110 V. R
= V / I = 4,400 O. Using the reactance of a capacitor, thatâs C = 1 /
(2 * pi * 60 Hz * 4400) = 0.6 µF. If you need more current, use a
larger capacitor, and vice-versa. Itâs that easy!
A fully elaborated TPS design requires a few more parts. For safety,
and to limit inrush current, a fuse and a one-watt current-limiting
resistor on the input are a good idea. A large-value discharge
resistor in parallel with the reactive capacitor will keep it from
holding its high voltage and shocking you when the circuit is
unplugged.
see
https://hackaday.com/2017/04/04/the-shocking-truth-about-transformerless-power-supplies/
But nowadays they\'re electronic. Switched mode has been around for years.
https://imgur.com/a/b8l5qKQ
Look at the circuit diagram. The positive of the battery is only connected through a capacitor. How can a capacitor possibly pass DC current to allow the battery to charge?