Le 15.05.2012 14:27, Erik Christiansen a écrit :
On 14.05.12 08:15, Ted Hyde wrote:
I've noticed that the current online spec sheet for the standard
PicoPSU says PG is acceptable between 10.5 and 13.5 vdc. It's not a
bold statement spec - you have to hunt for it. However, I'd believe
it in
dave wrote:
Hi all,
Sometime ago I bought a D510MO to replace my aging 1.2 GHz Duron. I'm
finally frustrated enough with the present cpu, etc. to actually
upgrade. ;-)
http://www.logicsupply.com/categories/power_supplies/dc_converters?gclid=COeJt5m4_q8CFSIHRQodoQGGHA
I've been looking at
The standard PICO power supplies are designed to be run off a regulated
12 volt PSU, not a 12 volt battery.
Only the wide range units are designed for car use - and some of them
will survive an engine starting cycle which is handy since you PC will
not reboot when starting
the car, boat, etc
Hi all,
Sometime ago I bought a D510MO to replace my aging 1.2 GHz Duron. I'm
finally frustrated enough with the present cpu, etc. to actually
upgrade. ;-)
http://www.logicsupply.com/categories/power_supplies/dc_converters?gclid=COeJt5m4_q8CFSIHRQodoQGGHA
I've been looking at the power
On 14 May 2012 00:51, dave dengv...@charter.net wrote:
http://www.logicsupply.com/categories/power_supplies/dc_converters?gclid=COeJt5m4_q8CFSIHRQodoQGGHA
I've been looking at the power supplies in the above link. Does anyone
have experience, recommendations, etc. Further what are people
On 5/13/2012 8:23 PM, andy pugh wrote:
On 14 May 2012 00:51, davedengv...@charter.net wrote:
http://www.logicsupply.com/categories/power_supplies/dc_converters?gclid=COeJt5m4_q8CFSIHRQodoQGGHA
I've been looking at the power supplies in the above link. Does anyone
have experience,
dave wrote:
Hi all,
Sometime ago I bought a D510MO to replace my aging 1.2 GHz Duron. I'm
finally frustrated enough with the present cpu, etc. to actually
upgrade. ;-)
http://www.logicsupply.com/categories/power_supplies/dc_converters?gclid=COeJt5m4_q8CFSIHRQodoQGGHA
I've been looking at
dave wrote:
Hi all,
Sometime ago I bought a D510MO to replace my aging 1.2 GHz Duron. I'm
finally frustrated enough with the present cpu, etc. to actually
upgrade. ;-)
Oh, and of course, you can buy a bunch of micro-ITX power supplies for
these 7 square CPUs. The lower-powered ones are
On 5/13/2012 7:51 PM, dave wrote:
Hi all,
Sometime ago I bought a D510MO to replace my aging 1.2 GHz Duron. I'm
finally frustrated enough with the present cpu, etc. to actually
upgrade. ;-)
http://www.logicsupply.com/categories/power_supplies/dc_converters?gclid=COeJt5m4_q8CFSIHRQodoQGGHA
Well, using a battery charger seem to be a high risk approach.
What Pico seem to delveir is I guess the right thing, a regulated and
shortcirciut-proof device intended for computer boards?
Potential problems with battery chargers as powersupplies are:
- Probably unfiltered DC
-
On 6 April 2011 21:07, andy pugh bodge...@gmail.com wrote:
10,000uF @ 100V is £20
10,000uF @ 400V is £135
I picked up 3 x 3300uF from eBay at £20 all-in. Compared to the $186
_each_ from Mouser and the similar RS price I think I got a bargain.
Now they have arrived, I think I see why they cost
On Wed, Apr 06, 2011 at 08:49:16PM +0100, andy pugh wrote:
And now the cap sizing.
If I say that I can put up with 10% ripple at max rated current (7.5A
for the motors) on a nominal 300V then I end up with
C = 7.5A X 10mS / 30V = 2500uF.
Eeek!
On Wed, Apr 06, 2011 at 09:22:59PM +0100, andy pugh wrote:
I have plenty of NTC surge limiters.
Andy, what sort of devices are you using? I started building a surge
limiter with MOSFETS. Those NTC things sound kinda useful.
I'm using toroidal transformers, and they can give a big thump on
On 7 April 2011 10:26, Erik Christiansen dva...@internode.on.net wrote:
Andy, what sort of devices are you using?
http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProductR=5167827
--
atp
Torque wrenches are for the obedience of fools and the guidance of wise men
They work very well. It pays to get ones that are rated at quite a bit
above your load current otherwise they do have a tendency to pop.
Actually a simple resistor in series with the mains works pretty well.
Just make sure it is a wire wound resistor that can take high surge
currents.
Les
Oops, this didn't make it to the list, apparently because Andy had
mailed both to the list and to me. My mail system detects duplicates,
and keeps only the first. Unfortunately that was the non-list duplicate.
Replying to that didn't go to the list.
I'll have to build better defences against
On Thursday, April 07, 2011 08:01:09 AM andy pugh did opine:
On 7 April 2011 10:26, Erik Christiansen dva...@internode.on.net wrote:
Andy, what sort of devices are you using?
http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getPro
ductR=5167827
One thing is missing here,
On Thursday, April 07, 2011 08:06:47 AM Erik Christiansen did opine:
Oops, this didn't make it to the list, apparently because Andy had
mailed both to the list and to me. My mail system detects duplicates,
and keeps only the first. Unfortunately that was the non-list duplicate.
Replying to
On Thu, Apr 07, 2011 at 08:10:55AM -0400, gene heskett wrote:
An additional thought comes to mind when using them for something like my
A3877 based xylotex setup, an extended time at low voltage is not
recommended as it causes more heat in the A3977's than the normal voltage,
so its
What about the old idea of putting a light bulb in series
with the mains? Would this have a useful effect?
ian
Actually a simple resistor in series with the mains works pretty well.
Just make sure it is a wire wound resistor that can take high surge
currents.
Ian W. Wright wrote:
What about the old idea of putting a light bulb in series
with the mains? Would this have a useful effect?
I think you've got it backwards.
The idea is to use a light bulb as a bleed resistor, and coincidentally
as a dangerous voltages present indicator :)
Light
On Thu, Apr 07, 2011 at 02:03:41PM +0100, Ian W. Wright wrote:
What about the old idea of putting a light bulb in series
with the mains? Would this have a useful effect?
It has a large positive temperature coefficient, so admits a large
initial surge, then limits the current to a much lower
Ok, wrong again...;-} I have seen them used as short circuit
protection which fits in with what you say.
ian
On 07/04/2011 14:11, Stephen Wille Padnos wrote:
Ian W. Wright wrote:
What about the old idea of putting a light bulb in series
with the mains? Would this have a useful effect?
I
On Thursday, April 07, 2011 10:27:37 AM Erik Christiansen did opine:
On Thu, Apr 07, 2011 at 08:10:55AM -0400, gene heskett wrote:
An additional thought comes to mind when using them for something like
my A3877 based xylotex setup, an extended time at low voltage is not
recommended as it
On Thursday, April 07, 2011 10:33:33 AM Ian W. Wright did opine:
What about the old idea of putting a light bulb in series
with the mains? Would this have a useful effect?
ian
If sized right, somewhat useful, but nothing like the NTC goodie. Sizing
it right can be a problem when dealing
I have 400V servo drives, 350V motors and 240V single-phase mains power.
Is there any reason that my servo power supplies need to be anything
more than a rectifier and caps? I will probably add a PTC and an input
fuse too.
Would a relay/resistor to discharge the caps on power-off be usual?
--
normally people discharge caps through a resistor only.
On Wed, Apr 6, 2011 at 8:18 AM, andy pugh bodge...@gmail.com wrote:
I have 400V servo drives, 350V motors and 240V single-phase mains power.
Is there any reason that my servo power supplies need to be anything
more than a rectifier and
On Wed, 6 Apr 2011, andy pugh wrote:
Date: Wed, 6 Apr 2011 14:18:18 +0100
From: andy pugh bodge...@gmail.com
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject: [Emc-users] PSU
I
On 6 April 2011 14:31, Igor Chudov ichu...@gmail.com wrote:
normally people discharge caps through a resistor only.
In that case, what would be the normal discharge time? Last time I did
the calculations it looked like a permanently-connected resistor
needed to be rated at several tens of watts
On Wed, Apr 6, 2011 at 8:51 AM, andy pugh bodge...@gmail.com wrote:
On 6 April 2011 14:31, Igor Chudov ichu...@gmail.com wrote:
normally people discharge caps through a resistor only.
In that case, what would be the normal discharge time? Last time I did
the calculations it looked like a
On Wed, Apr 06, 2011 at 02:51:02PM +0100, andy pugh wrote:
On 6 April 2011 14:31, Igor Chudov ichu...@gmail.com wrote:
normally people discharge caps through a resistor only.
In that case, what would be the normal discharge time? Last time I did
the calculations it looked like a
On 4/6/2011 9:18 AM, andy pugh wrote:
I have 400V servo drives, 350V motors and 240V single-phase mains power.
Is there any reason that my servo power supplies need to be anything
more than a rectifier and caps? I will probably add a PTC and an input
fuse too.
Would a relay/resistor to
On 04/06/2011 07:32 AM, Dave wrote:
On 4/6/2011 9:18 AM, andy pugh wrote:
I have 400V servo drives, 350V motors and 240V single-phase mains power.
Is there any reason that my servo power supplies need to be anything
more than a rectifier and caps? I will probably add a PTC and an input
fuse
On Wed, 6 Apr 2011, Rafael Skodlar wrote:
Date: Wed, 06 Apr 2011 09:45:45 -0700
From: Rafael Skodlar ra...@linwin.com
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] PSU
On 04/06/2011 07:32 AM
On Wednesday, April 06, 2011 01:07:23 PM andy pugh did opine:
I have 400V servo drives, 350V motors and 240V single-phase mains power.
Is there any reason that my servo power supplies need to be anything
more than a rectifier and caps? I will probably add a PTC and an input
fuse too.
On 4/6/2011 1:18 PM, Peter C. Wallace wrote:
The relay/resistor combination can do this much faster that a
reasonably bleeder, say .5 seconds or so. This makes the power supply safer
and provides braking of all servo axis in a fault condition.
That's what I was thinking. And since the
On Wed, 6 Apr 2011, andy pugh wrote:
Date: Wed, 6 Apr 2011 20:49:16 +0100
From: andy pugh bodge...@gmail.com
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] PSU
Compare and contrast:
http://cgi.ebay.co.uk/RIFA-EVOX-CAPACITOR-PEH200-3300UF-NEW-/180648591924
and
http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProductR=3111254
== eBay Bargain.
Whereas:
http://cgi.ebay.co.uk/NEW-Epcos-Electrolytic-Capacitor-2200uF-B43564A5228M000
and
Just a data point, I used a 10,000 uF capacitor for my 72v, 25A power
supply.
Seems to work great.
i
On Wed, Apr 6, 2011 at 2:49 PM, andy pugh bodge...@gmail.com wrote:
And now the cap sizing.
If I say that I can put up with 10% ripple at max rated current (7.5A
for the motors) on a nominal
On 6 April 2011 20:59, andy pugh bodge...@gmail.com wrote:
http://cgi.ebay.co.uk/NEW-Epcos-Electrolytic-Capacitor-2200uF-B43564A5228M000
http://cgi.ebay.co.uk/NEW-Epcos-Electrolytic-Capacitor-2200uF-B43564A5228M000-/290534781332
(if anyone cares). Basically 3x the price from eBay as from the
On 6 April 2011 20:57, Igor Chudov ichu...@gmail.com wrote:
Just a data point, I used a 10,000 uF capacitor for my 72v, 25A power
supply.
10,000uF @ 100V is £20
10,000uF @ 400V is £135
Perhaps a transformer would be more cost-effective :-)
--
atp
Torque wrenches are for the obedience of
On Wednesday, April 06, 2011 04:02:33 PM andy pugh did opine:
And now the cap sizing.
If I say that I can put up with 10% ripple at max rated current (7.5A
for the motors) on a nominal 300V then I end up with
C = 7.5A X 10mS / 30V = 2500uF.
Eeek!
Understatement Andy, it will weld relays
And now the cap sizing.
If I say that I can put up with 10% ripple at max rated current (7.5A
for the motors) on a nominal 300V then I end up with
C = 7.5A X 10mS / 30V = 2500uF.
Eeek!
http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProductR=5436785
Is the cheapest that is
On Wed, 6 Apr 2011, andy pugh wrote:
Date: Wed, 6 Apr 2011 21:07:53 +0100
From: andy pugh bodge...@gmail.com
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] PSU
On 6
On Wed, Apr 6, 2011 at 3:14 PM, gene heskett ghesk...@wdtv.com wrote:
On Wednesday, April 06, 2011 04:02:33 PM andy pugh did opine:
And now the cap sizing.
If I say that I can put up with 10% ripple at max rated current (7.5A
for the motors) on a nominal 300V then I end up with
C = 7.5A
On 6 April 2011 21:14, gene heskett ghesk...@wdtv.com wrote:
Understatement Andy, it will weld relays closed with the inrush unless
surge limited.
I have plenty of NTC surge limiters.
And for 60hz power, your 10ms would be 8.333 for a
full wave bridge.
Yes, but I have proper,
On Wednesday, April 06, 2011 04:25:58 PM Igor Chudov did opine:
On Wed, Apr 6, 2011 at 3:14 PM, gene heskett ghesk...@wdtv.com wrote:
On Wednesday, April 06, 2011 04:02:33 PM andy pugh did opine:
And now the cap sizing.
If I say that I can put up with 10% ripple at max rated current
On Wednesday, April 06, 2011 04:28:52 PM andy pugh did opine:
On 6 April 2011 21:14, gene heskett ghesk...@wdtv.com wrote:
Understatement Andy, it will weld relays closed with the inrush unless
surge limited.
I have plenty of NTC surge limiters.
�And for 60hz power, your 10ms would be
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