Robert Bruninga via EV wrote:
UPDATE:
For grins, I had the LEDs from a second bulb. It fully illuminated at the
same 80 volts over 14 LEDs at 60 mA, but was 100% linear among the LEDs.
Every one of the LEDs started dim and ramped up linearly and identical to
each other just as one would expect
List
Cc: Robert Bruninga
Subject: RE: [EVDL] Reduce EV: Charging load on the grid ... LEDs
> If you're running the LEDs on 120vac, the voltage drop needed is much
larger.
The 60W equivalent I just took apart had a full 14 LEDs in series but still
used a PWM controller.
It took 80 volts DC to
Again, it was the LED board only.. No other parts other than the 14 white
LED's in series.
-Original Message-
From: EV On Behalf Of Lee Hart via EV
Sent: Friday, July 27, 2018 1:43 PM
To: Electric Vehicle Discussion List
Cc: Lee Hart
Subject: Re: [EVDL] Reduce EV: Charging load
Robert Bruninga via EV wrote:
The 60W equivalent I just took apart had a full 14 LEDs in series but
still used a PWM controller.
It took 80 volts DC to get the LED's to their proper brilliance. So just
a small resistor will do.
Right. And a rectifier. :-)
80/120v means a simple series
> If you're running the LEDs on 120vac, the voltage drop needed is much
larger.
The 60W equivalent I just took apart had a full 14 LEDs in series but
still used a PWM controller.
It took 80 volts DC to get the LED's to their proper brilliance. So just
a small resistor will do.
This is just the
Robert Bruninga via EV wrote:
I am now seeing LED bulb failures. A total of 6 so far, and every one of
them is not the LED's but the power circuit.
I run them through a band saw to remove the "pingpong" plastic dome and
remove two screws and the flat LED PCB
Simply unplugs from pins on the
ROBERT via EV wrote:
The other advance that made LED lighting possible was low cost PWM
LED drivers on a chip or with few components. Even today an LED
cannot take a continuous high current.
I agree with Cor. LED prices and efficiency have improved markedly,
which is what has made them
themselves are always good.
I use the LED circuit board as-is in other lower voltage lighting
projects.
Bob
-Original Message-
From: EV On Behalf Of ROBERT via EV
Sent: Wednesday, July 25, 2018 6:56 PM
To: Electric Vehicle Discussion List
Cc: ROBERT ; brucedp5
Subject: Re: [EVDL]
To: Electric Vehicle Discussion List
Cc: Cor van de Water; brucedp5
Subject: Re: [EVDL] Reduce EV: Charging load on the grid ...
Bruce,
If you ever saw the old LEDs, I received one from my dad in the early 80s and
while their life is astonishing, they will run for decades and still work
: Wednesday, July 25, 2018 3:56 PM
To: Electric Vehicle Discussion List
Cc: Cor van de Water; brucedp5
Subject: Re: [EVDL] Reduce EV: Charging load on the grid ...
The other advance that made LED lighting possible was low cost PWM LED drivers
on a chip or with few components. Even today an LED
observer is unable to distinguish between the two used side by
side, except for the waste heat produced by the incandescent.
Regards,
Cor.
Sent from Mail for Windows 10
From: brucedp5 via EV
Sent: Wednesday, July 25, 2018 2:28 PM
To: ev@lists.evdl.org
Cc: brucedp5
Subject: [EVDL] Reduce EV
[ref
http://electric-vehicle-discussion-list.413529.n4.nabble.com/Charging-load-on-the-grid-NOT-tp4690636.html
]
% Here's a link to help/support what Lawrence posted about:
https://en.wikipedia.org/wiki/LED_lamp
A LED lamp or LED light bulb is an electric light for use in light fixtures
that
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