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
>
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 that if you fed 13.6, it would shut down.
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 as
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
>
>
> 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 unfiltere
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_q8CFSIHRQodoQ
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 one
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 lo
On 5/13/2012 8:23 PM, andy pugh wrote:
> On 14 May 2012 00:51, dave 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.
On 14 May 2012 00:51, dave 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 using
> for the 12 VD
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 supplies
On 6 April 2011 21:07, andy pugh 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 so much, They ar
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 deal
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 a
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?
>>
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 v
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
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.
>
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 p
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 Thursday, April 07, 2011 08:01:09 AM andy pugh did opine:
> On 7 April 2011 10:26, Erik Christiansen wrote:
> > Andy, what sort of devices are you using?
>
> http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getPro
> duct&R=5167827
One thing is missing here, actually 2. What
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 "help
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
On
On 7 April 2011 10:26, Erik Christiansen wrote:
> Andy, what sort of devices are you using?
http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProduct&R=5167827
--
atp
"Torque wrenches are for the obedience of fools and the guidance of wise men"
-
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
st
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!
>
> http://uk.rs-online.com/web/search/se
On Wednesday, April 06, 2011 04:28:52 PM andy pugh did opine:
> On 6 April 2011 21:14, gene heskett 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 8.3
On Wednesday, April 06, 2011 04:25:58 PM Igor Chudov did opine:
> On Wed, Apr 6, 2011 at 3:14 PM, gene heskett 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 f
On 6 April 2011 21:14, gene heskett 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, Imperial BSI-appro
On Wed, Apr 6, 2011 at 3:14 PM, gene heskett 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 X 10mS
On Wed, 6 Apr 2011, andy pugh wrote:
Date: Wed, 6 Apr 2011 21:07:53 +0100
From: andy pugh
Reply-To: "Enhanced Machine Controller (EMC)"
To: "Enhanced Machine Controller (EMC)"
Subject: Re: [Emc-users] PSU
On 6 April 2011 20:57, Igor Chudov wrote:
Just a data point
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 r
On 6 April 2011 20:57, Igor Chudov 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 fools and the guida
On 6 April 2011 20:59, andy pugh 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 Most
Expensive Shop
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 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
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=getProduct&R=3111254
== eBay Bargain.
Whereas:
http://cgi.ebay.co.uk/NEW-Epcos-Electrolytic-Capacitor-2200uF-B43564A5228M000
and
ht
On Wed, 6 Apr 2011, andy pugh wrote:
> Date: Wed, 6 Apr 2011 20:49:16 +0100
> From: andy pugh
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: "Enhanced Machine Controller (EMC)"
> Subject: Re: [Emc-users] PSU
>
> And now the cap sizing.
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=getProduct&R=5436785
Is the cheapest that is
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
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 Wed, 6 Apr 2011, Rafael Skodlar wrote:
> Date: Wed, 06 Apr 2011 09:45:45 -0700
> From: Rafael Skodlar
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] PSU
>
> On 04/06/2011 07:32 AM,
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 inpu
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 t
On Wed, Apr 06, 2011 at 02:51:02PM +0100, andy pugh wrote:
> On 6 April 2011 14:31, Igor Chudov 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 r
On Wed, Apr 6, 2011 at 8:51 AM, andy pugh wrote:
> On 6 April 2011 14:31, Igor Chudov 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
>
On 6 April 2011 14:31, Igor Chudov 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 to not melt durin
On Wed, 6 Apr 2011, andy pugh wrote:
> Date: Wed, 6 Apr 2011 14:18:18 +0100
> From: andy pugh
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: "Enhanced Machine Controller (EMC)"
> Subject: [Emc-users] PSU
>
> I have 400V servo drives, 3
normally people discharge caps through a resistor only.
On Wed, Apr 6, 2011 at 8:18 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 pr
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?
--
a
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