Maker Pro
Maker Pro

EL7900

M

Marco Trapanese

Jan 1, 1970
0
Il 05/09/2012 00:03, John Fields ha scritto:
Would you do me a favor and measure the output short-circuit current
available from the device, please?

Like this:

.+5-------+--------+
. | |
. [R] |
. | +--+--+
. [LED]-->| Is|---+
. | |_ | |
. +-----|E | [mA]
. | +--+--+ |
. | | |
.GND>-----+--------+------+


You drew a led coupled to the photodiode. Do you recommend any kind of
led (white, green, etc...)? What's the difference between using a led
instead a lamp or sunlight?

Marco
 
M

Marco Trapanese

Jan 1, 1970
0
Il 05/09/2012 11:26, John Fields ha scritto:
It Probably doesn't make much difference, but figure 1 on page 3 of
the data sheet shows peaks in the green and IR.
---


---
Assuming you can get enough out of the LED to drive the device to
failure, the LED will have less of a wavelength variation when it's
dimmed than an incandescent lamp will, and fooling around with the sun
is a huge PITA.


Well, I have only standard green leds (low-power) and they can't drive
the device properly.

So I used several light sources: white led, incandescent lamp and
halogen lamp. With a supply of +5V the maximum output current measured
was about 4 mA no matter how close the light source was. Unfortunately
today I can access only to a DMM with 1 mA of resolution.

With a supply of 3.3V I read max 3 mA.

I didn't see any collapse.
I'm curious to redo the test with direct sunlight - when possible.

Marco
 
J

JW

Jan 1, 1970
0
I meant every word of it. People living in glass houses eventually
get exposed for who they are.

It's simple really, SLow_Man has done so much that he must be over 300
hundred years old. His intellect being so vast he must of design some
sort of gravity assist using quantum mechanics and maybe even a 555
timer in there with selenium rectifiers to hold that fat head of his on
his shoulders. I was going to suggest a 5U3 but, he likes stinky things.

He's a man that has done it all and knows it all. Can find fault in
everything any one does, even if it is right. Frankly,
I don't think he knows any better half the time any way. After all, the
internet can't be wrong, can it?

Allow me.

*ahem*

*Whoosh!*
 
M

MrTallyman

Jan 1, 1970
0

The sad part is that you dumbfucks re-quote and re-post well over 50
lines of his and your previous utter baby bullshit with each post.

Truly as dumb as it gets. Usenet has come fool circle.
 
J

Jamie

Jan 1, 1970
0
MrTallyman said:
The sad part is that you dumbfucks re-quote and re-post well over 50
lines of his and your previous utter baby bullshit with each post.

Truly as dumb as it gets. Usenet has come fool circle.
The autistic glaucomatous, awakens.

jamie
 
B

Bill Sloman

Jan 1, 1970
0
You don't pay much attention, do you. There are things that I knew
that turned out not be so, and some of them get exposed here.

It doesn't happen all that often, but it has certainly happened.



It varies. I'm damned if can remember who did it most recently - I had
an idea that it was Tim Williams but the search engine doesn't throw
up anything.

It seems to have been Phil Hobbs in the thread "LTC Switcher CAD3 ?"
on the 4th June.

I was talking about nanohenries per root turn, which is a mistake I'd
been making for years, and I didn't immediately realise that Phil was
right when he told me that it should have been Henries per turn
squared. It was three in the morning, my time, and I should have gone
to bed rather than responding without thinking hard enough about what
I was posting.

It was embarrassingly obvious that he was right when I looked at the
thread the following morning, and I did post an acknowledgement
immediately.

You should have remembered. You chimed in almost immediately, and - as
usual - said absolutely nothing that was interesting or useful.
 
J

John S

Jan 1, 1970
0
The sad part is that you dumbfucks re-quote and re-post well over 50
lines of his and your previous utter baby bullshit with each post.

Truly as dumb as it gets. Usenet has come fool circle.

So, who is forcing poor baby Tallywhacker to read it? Dumbfuck!
 
J

John S

Jan 1, 1970
0
The sad part is that you dumbfucks re-quote and re-post well over 50
lines of his and your previous utter baby bullshit with each post.

Truly as dumb as it gets. Usenet has come fool circle.

As self-centered as you are, you won't understand this: Nobody here
posts for your convenience or pleasure. Get used to it, Dumbfuck.
 
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