hope it is
it), the guy said I could probably get by with 18VDC, but it would
strain the capacitors (my math suggests that 15VDC is closer to the mark).
So, does anyone know where I can get a 12V AC power supply? They are not
exactly a commodity.
Thanks,
Shachar
--
Shachar Shemesh
Lin
nice, and when we, finally, found out the
source (I hope it is it), the guy said I could probably get by with
18VDC, but it would strain the capacitors (my math suggests that
15VDC is closer to the mark).
So, does anyone know where I can get a 12V AC power supply? They are
not exactly a co
. They were very
> nice, and when we, finally, found out the source (I hope it is it), the guy
> said I could probably get by with 18VDC, but it would strain the capacitors
> (my math suggests that 15VDC is closer to the mark).
>
> So, does anyone know where I can get a 12V AC
AC I need, and started a support call with the company. They were very
> nice, and when we, finally, found out the source (I hope it is it), the guy
> said I could probably get by with 18VDC, but it would strain the capacitors
> (my math suggests that 15VDC is closer to the mark).
>
>
I have 220->16VAC.
- yba
On Tue, 13 Jul 2010, Shachar Shemesh wrote:
Date: Tue, 13 Jul 2010 09:13:10 +0300
From: Shachar Shemesh
To: linux-il
Subject: A 12V *AC* power supply
Hi list,
I bought a USB connected logic analyzer for too much money (not that much).
When buying, I di
ce, and when we, finally, found out the source (I hope it
is it), the guy said I could probably get by with 18VDC, but it would
strain the capacitors (my math suggests that 15VDC is closer to the mark).
So, does anyone know where I can get a 12V AC power supply? They are
not exactly a commodity.j
that it's AC I need, and started a support call with the company. They
were very nice, and when we, finally, found out the source (I hope it is
it), the guy said I could probably get by with 18VDC, but it would
strain the capacitors (my math suggests that 15VDC is closer to the mark).
So, d
geoffrey mendelson wrote:
I just took a DC adaptor and removed the components that coverted the
AC to DC. I did that for some modems that needed AC but came without
adaptors.
That's what I ended up doing. Now I'm having second thoughts whether I
did that correctly.
The DC adapter had th
On Wed, Jul 14, 2010, Shachar Shemesh wrote about "Re: A 12V *AC* power supply":
> I checked the output signal after removing all of the above (resistor
> included), and a volt meter and an oscilloscope both shows exactly what
> I was hoping to see - an AC line giving the c
The transformer gives 12V DC RMS, The peak voltage however is higher (but
with lower current)
I guess the reason for the resistor is to reduce the peak voltage and keep
it closer to 12V when there is little or no load, or when connecting the
load.
cheers,
erez.
2010/7/14 Shachar Shemesh
> ge
Nadav Har'El wrote:
My guess (it's been ages since I dabbled in electronics...), is that the
resistor is there to prevent the destruction of the power supply in case
in a short circuit in its load. In other words, it gives an upper limit
to the current that you can draw out of the power supply.
I seconds that.
without this resistor the voltage at low currents will go sky high (~20V)
the 12V is usually close to the maximum current.
Alon.
On 7/14/2010 11:46 AM, Erez D wrote:
The transformer gives 12V DC RMS, The peak voltage however is higher
(but with lower current)
I guess the reas
Alon Barzilai wrote:
I seconds that.
without this resistor the voltage at low currents will go sky high (~20V)
Why would it? The transformator pretty much dictates the maximal power.
the 12V is usually close to the maximum current.
I can understand the logic of that statement. However, once I
On 7/14/2010 4:18 PM, Shachar Shemesh wrote:
Alon Barzilai wrote:
I seconds that.
without this resistor the voltage at low currents will go sky high (~20V)
Why would it? The transformator pretty much dictates the maximal power.
the 12V is usually close to the maximum current.
I can underst
Alon Barzilai wrote:
one more thing you can do, is to open up the 110V transformer and see
what inside, my guess is that it have no other component then the real
transformer inside, with pa primary coil for 110v and secondary for 12V.
and you replace it with another one when the primary coil
2010/7/14 Shachar Shemesh
> Alon Barzilai wrote:
>
> I seconds that.
> without this resistor the voltage at low currents will go sky high (~20V)
>
> Why would it? The transformator pretty much dictates the maximal power.
>
the transformers wants to supply 12V DC. so 12V is the average voltage
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