It just reinforces by view - for DIY, only buy cordless tools where you
*really* need them. Or be prepared to replace them regularly.

--
*Does fuzzy logic tickle? *

Dave Plowman London SW
To e-mail, change noise into sound.

On Thu, 09 Jun 2011 15:14:58 +0100, "Dave Plowman (News)"
wrote:

It just reinforces by view - for DIY, only buy cordless tools where you
*really* need them. Or be prepared to replace them regularly.

There are ways to power it, but the expense and complexity of trying
to charge lead acids or produce a high current mains supply would be
prohibitive

Cheapest solution would be a couple of car batteries, connect them in
series and hope for the best that the stapler doesn't demolish the
wall, burn out or kill anyone within 100 metres.


Now if youy have a lot of cordless tools of the same Voltage, a nice
DC ring main from trickle charged lead acids would be efficient. You
could tailor the Voltage using cells of a similar capacity.

You might want to get your insurance company involved though :-)


HN

On Jun 9, 9:14*pm, H. Neary wrote:
On Thu, 09 Jun 2011 15:14:58 +0100, "Dave Plowman (News)"

wrote:
It just reinforces by view - for DIY, only buy cordless tools where you
*really* need them. Or be prepared to replace them regularly.

There are ways to power it, but the expense and complexity of trying
to charge lead acids or produce a high current mains supply would be
prohibitive

I'm unclear what's prohibitive about pc psus, plenty available at no
cost, and many can deliver 30A.
Charging lead acids is hardly difficult.


NT

On Thu, 9 Jun 2011 14:18:55 -0700 (PDT), Tabby
wrote:

On Jun 9, 9:14*pm, H. Neary wrote:
On Thu, 09 Jun 2011 15:14:58 +0100, "Dave Plowman (News)"

wrote:
It just reinforces by view - for DIY, only buy cordless tools where you
*really* need them. Or be prepared to replace them regularly.

There are ways to power it, but the expense and complexity of trying
to charge lead acids or produce a high current mains supply would be
prohibitive

I'm unclear what's prohibitive about pc psus, plenty available at no
cost, and many can deliver 30A.
Charging lead acids is hardly difficult.


NT

I think that 18V at 30 A would cost a bit, even with a Chinese Ebay
solution.

Charging lead acids is simple. Try matching a car and motobike battery
for a series circuit though. You may hit on a couple that are matched
capacity wise, but I doubt it. You would probably overcharge one and
leave the other [12V] flat, or reverse charge the 6V leading to a
rapid demise.

Anything but vehicle batteries would come at a great cost unless the
purchaser had inroads into an industry such as an alarm company or UPS
supplier

Methinks the simplest solution is a Screwfix, Wickes or Toolstation
catalogue[ 240 or 110V bits] , a long extension and perhaps a Bosh
battery hammer drill for the times when One can't be bothered to to
pay out the cable.

Never had a problem with lack of a power source, all my tools are 240V
and I have a Bosh "professional" for the odd quick jobs.

Sadly my three year old Bosh is worn out, there is a lot of play in
the chuck. Methinks it was due to using the SDS toolkit that was
supplied with my Screwfix SDS drill & kit.

Havn't used the SDS drill yet, amazingly robust toolkit but I find the
6Kg drill a bit difficult to waggle about.

HN

On Jun 9, 11:34*pm, H. Neary nearyh @clara.co.uk wrote:
On Thu, 9 Jun 2011 14:18:55 -0700 (PDT), Tabby
wrote:



On Jun 9, 9:14 pm, H. Neary nearyh @clara.co.uk wrote:
On Thu, 09 Jun 2011 15:14:58 +0100, "Dave Plowman (News)"

wrote:
It just reinforces by view - for DIY, only buy cordless tools where you
*really* need them. Or be prepared to replace them regularly.

There are ways to power it, but the expense and complexity of trying
to charge lead acids or produce a high current mains supply would be
prohibitive

I'm unclear what's prohibitive about pc psus, plenty available at no
cost, and many can deliver 30A.
Charging lead acids is hardly difficult.

NT

I think that 18V at 30 A would cost a bit, even with a Chinese Ebay
solution.

As already said, pc supplies dont cost a bean.


Charging lead acids is simple. Try matching a car and motobike battery
for a series circuit though. You may hit on a couple that are matched
capacity wise, but I doubt it. You would probably overcharge one and
leave the other [12V] flat, or reverse charge the 6V leading to a
rapid demise.

Anything but vehicle batteries would come at a great cost unless the
purchaser had inroads into an industry such as an alarm company or UPS
supplier

if I wanted to do this I'd probably go to a scrapyard and get 3x 6v
batteries. Cheaper than a new set of nicads.


NT

On 10/06/2011 02:00, Tabby wrote:

I'm unclear what's prohibitive about pc psus, plenty available at no
cost, and many can deliver 30A.
Charging lead acids is hardly difficult.

NT

I think that 18V at 30 A would cost a bit, even with a Chinese Ebay
solution.

As already said, pc supplies dont cost a bean.

5v at 30A is a bit different to 18v at 30A...

On Jun 10, 3:22*am, Clive George wrote:
On 10/06/2011 02:00, Tabby wrote:

I'm unclear what's prohibitive about pc psus, plenty available at no
cost, and many can deliver 30A.
Charging lead acids is hardly difficult.

NT

I think that 18V at 30 A would cost a bit, even with a Chinese Ebay
solution.

As already said, pc supplies dont cost a bean.

5v at 30A is a bit different to 18v at 30A...

The only difference is needing to disconnect the wire from PCB to case
so they can be put in series. Not much of a challenge.


NT

On Jun 9, 10:18*pm, Tabby wrote:
On Jun 9, 9:14*pm, H. Neary wrote:

On Thu, 09 Jun 2011 15:14:58 +0100, "Dave Plowman (News)"

wrote:
It just reinforces by view - for DIY, only buy cordless tools where you
*really* need them. Or be prepared to replace them regularly.

There are ways to power it, but the expense and complexity of trying
to charge lead acids or produce a high current mains supply would be
prohibitive

I'm unclear what's prohibitive about pc psus, plenty available at no
cost, and many can deliver 30A.

Yes, but at 3.3V or 5V.

MBQ

On Jun 10, 2:00*am, Tabby wrote:
On Jun 9, 11:34*pm, H. Neary * nearyh * @clara.co.uk wrote:









On Thu, 9 Jun 2011 14:18:55 -0700 (PDT), Tabby
wrote:

On Jun 9, 9:14 pm, H. Neary nearyh @clara.co.uk wrote:
On Thu, 09 Jun 2011 15:14:58 +0100, "Dave Plowman (News)"

wrote:
It just reinforces by view - for DIY, only buy cordless tools where you
*really* need them. Or be prepared to replace them regularly.

There are ways to power it, but the expense and complexity of trying
to charge lead acids or produce a high current mains supply would be
prohibitive

I'm unclear what's prohibitive about pc psus, plenty available at no
cost, and many can deliver 30A.
Charging lead acids is hardly difficult.

NT

I think that 18V at 30 A would cost a bit, even with a Chinese Ebay
solution.

As already said, pc supplies dont cost a bean.


Which bit if the voltage difference are you struggling with?

MBQ

On Jun 10, 3:04*pm, "Man at B&Q" wrote:
On Jun 10, 2:00*am, Tabby wrote:



On Jun 9, 11:34*pm, H. Neary * nearyh * @clara.co.uk wrote:

On Thu, 9 Jun 2011 14:18:55 -0700 (PDT), Tabby
wrote:

On Jun 9, 9:14 pm, H. Neary nearyh @clara.co.uk wrote:
On Thu, 09 Jun 2011 15:14:58 +0100, "Dave Plowman (News)"

wrote:
It just reinforces by view - for DIY, only buy cordless tools where you
*really* need them. Or be prepared to replace them regularly.

There are ways to power it, but the expense and complexity of trying
to charge lead acids or produce a high current mains supply would be
prohibitive

I'm unclear what's prohibitive about pc psus, plenty available at no
cost, and many can deliver 30A.
Charging lead acids is hardly difficult.

NT

I think that 18V at 30 A would cost a bit, even with a Chinese Ebay
solution.

As already said, pc supplies dont cost a bean.

Which bit if the voltage difference are you struggling with?

MBQ

Which part of putting 3 psus in series are you not comprehending?
That's why the grounding needs altering on 2 of them.


NT

On Fri, 10 Jun 2011 07:03:13 -0700 (PDT), "Man at B&Q"
wrote:

On Jun 9, 10:18*pm, Tabby wrote:
On Jun 9, 9:14*pm, H. Neary wrote:

On Thu, 09 Jun 2011 15:14:58 +0100, "Dave Plowman (News)"

wrote:
It just reinforces by view - for DIY, only buy cordless tools where you
*really* need them. Or be prepared to replace them regularly.

There are ways to power it, but the expense and complexity of trying
to charge lead acids or produce a high current mains supply would be
prohibitive

I'm unclear what's prohibitive about pc psus, plenty available at no
cost, and many can deliver 30A.

Yes, but at 3.3V or 5V.

MBQ

SMPS's in series?

You cannot be series about this?

I'm not saying it wont work, but regulated supplies with no common
reference sounds a bit iffy.

If you can get 3* 6V lead acids, go for it. Charging identical
batteries is simple enough. Just ensure that they are returnable.

Why not adopt this solution in the first place?

HN

On Jun 10, 9:45*pm, H. Neary nearyh @clara.co.uk wrote:
On Fri, 10 Jun 2011 07:03:13 -0700 (PDT), "Man at B&Q"



wrote:
On Jun 9, 10:18 pm, Tabby wrote:
On Jun 9, 9:14 pm, H. Neary nearyh @clara.co.uk wrote:

On Thu, 09 Jun 2011 15:14:58 +0100, "Dave Plowman (News)"

wrote:
It just reinforces by view - for DIY, only buy cordless tools where you
*really* need them. Or be prepared to replace them regularly.

There are ways to power it, but the expense and complexity of trying
to charge lead acids or produce a high current mains supply would be
prohibitive

I'm unclear what's prohibitive about pc psus, plenty available at no
cost, and many can deliver 30A.

Yes, but at 3.3V or 5V.

MBQ

SMPS's in series?

You cannot be series about this?

I'm not saying it wont work, but regulated supplies with no common
reference sounds a bit iffy.

If you can get 3* 6V lead acids, go for it. Charging identical
batteries is simple enough. Just ensure that they are returnable.

Why not adopt this solution in the first place?

HN

Maybe electronic engineering isnt your thing


NT

On Fri, 10 Jun 2011 15:55:11 -0700 (PDT), Tabby
wrote:

On Jun 10, 9:45*pm, H. Neary nearyh @clara.co.uk wrote:
On Fri, 10 Jun 2011 07:03:13 -0700 (PDT), "Man at B&Q"



wrote:
On Jun 9, 10:18 pm, Tabby wrote:
On Jun 9, 9:14 pm, H. Neary nearyh @clara.co.uk wrote:

On Thu, 09 Jun 2011 15:14:58 +0100, "Dave Plowman (News)"

wrote:
It just reinforces by view - for DIY, only buy cordless tools where you
*really* need them. Or be prepared to replace them regularly.

There are ways to power it, but the expense and complexity of trying
to charge lead acids or produce a high current mains supply would be
prohibitive

I'm unclear what's prohibitive about pc psus, plenty available at no
cost, and many can deliver 30A.

Yes, but at 3.3V or 5V.

MBQ

SMPS's in series?

You cannot be series about this?

I'm not saying it wont work, but regulated supplies with no common
reference sounds a bit iffy.

If you can get 3* 6V lead acids, go for it. Charging identical
batteries is simple enough. Just ensure that they are returnable.

Why not adopt this solution in the first place?

HN

Maybe electronic engineering isnt your thing


NT

What has electronic engineering got to do with batteries?

Do you not think that batteries are more akin to chemical engineering?


HN

Tabby wrote:
On Jun 10, 9:45 pm, H. Neary nearyh @clara.co.uk wrote:
On Fri, 10 Jun 2011 07:03:13 -0700 (PDT), "Man at B&Q"



wrote:
On Jun 9, 10:18 pm, Tabby wrote:
On Jun 9, 9:14 pm, H. Neary nearyh @clara.co.uk wrote:
On Thu, 09 Jun 2011 15:14:58 +0100, "Dave Plowman (News)"
wrote:
It just reinforces by view - for DIY, only buy cordless tools where you
*really* need them. Or be prepared to replace them regularly.
There are ways to power it, but the expense and complexity of trying
to charge lead acids or produce a high current mains supply would be
prohibitive
I'm unclear what's prohibitive about pc psus, plenty available at no
cost, and many can deliver 30A.
Yes, but at 3.3V or 5V.
MBQ
SMPS's in series?

You cannot be series about this?

I'm not saying it wont work, but regulated supplies with no common
reference sounds a bit iffy.

If you can get 3* 6V lead acids, go for it. Charging identical
batteries is simple enough. Just ensure that they are returnable.

Why not adopt this solution in the first place?

HN

Maybe electronic engineering isnt your thing


Indeed. the amount of lab power supplies we used to connect in
series..they all had three terminals. Plus, minus and ground.

NT

On Jun 11, 1:02*am, H. Neary nearyh @clara.co.uk wrote:
On Fri, 10 Jun 2011 15:55:11 -0700 (PDT), Tabby
wrote:



On Jun 10, 9:45 pm, H. Neary * nearyh * @clara.co.uk wrote:
On Fri, 10 Jun 2011 07:03:13 -0700 (PDT), "Man at B&Q"

wrote:
On Jun 9, 10:18 pm, Tabby wrote:
On Jun 9, 9:14 pm, H. Neary nearyh @clara.co.uk wrote:

On Thu, 09 Jun 2011 15:14:58 +0100, "Dave Plowman (News)"

wrote:
It just reinforces by view - for DIY, only buy cordless tools where you
*really* need them. Or be prepared to replace them regularly.

There are ways to power it, but the expense and complexity of trying
to charge lead acids or produce a high current mains supply would be
prohibitive

I'm unclear what's prohibitive about pc psus, plenty available at no
cost, and many can deliver 30A.

Yes, but at 3.3V or 5V.

MBQ

SMPS's in series?

You cannot be series about this?

I'm not saying it wont work, but regulated supplies with no common
reference sounds a bit iffy.

If you can get 3* 6V lead acids, go for it. Charging identical
batteries is simple enough. Just ensure that they are returnable.

Why not adopt this solution in the first place?

HN

Maybe electronic engineering isnt your thing

NT

What has electronic engineering got to do with batteries?

Do you not think that batteries are more akin to chemical engineering?

HN

I was referring to your comments on the pc psu option - no batteries
involved.


NT

On Sat, 11 Jun 2011 15:16:31 -0700 (PDT), Tabby
wrote:

On Jun 11, 1:02*am, H. Neary nearyh @clara.co.uk wrote:
On Fri, 10 Jun 2011 15:55:11 -0700 (PDT), Tabby
wrote:



On Jun 10, 9:45 pm, H. Neary * nearyh * @clara.co.uk wrote:
On Fri, 10 Jun 2011 07:03:13 -0700 (PDT), "Man at B&Q"

wrote:
On Jun 9, 10:18 pm, Tabby wrote:
On Jun 9, 9:14 pm, H. Neary nearyh @clara.co.uk wrote:

On Thu, 09 Jun 2011 15:14:58 +0100, "Dave Plowman (News)"

wrote:
It just reinforces by view - for DIY, only buy cordless tools where you
*really* need them. Or be prepared to replace them regularly.

There are ways to power it, but the expense and complexity of trying
to charge lead acids or produce a high current mains supply would be
prohibitive

I'm unclear what's prohibitive about pc psus, plenty available at no
cost, and many can deliver 30A.

Yes, but at 3.3V or 5V.

MBQ

SMPS's in series?

You cannot be series about this?

I'm not saying it wont work, but regulated supplies with no common
reference sounds a bit iffy.

If you can get 3* 6V lead acids, go for it. Charging identical
batteries is simple enough. Just ensure that they are returnable.

Why not adopt this solution in the first place?

HN

Maybe electronic engineering isnt your thing

NT

What has electronic engineering got to do with batteries?

Do you not think that batteries are more akin to chemical engineering?

HN

I was referring to your comments on the pc psu option - no batteries
involved.


NT

I wasn't implying that it wouldn't work, personally I would not go out
and buy three supplies expecting them to work together trouble free.

As none of the supplies are going to be exactly the rated output, one
will think it has to supply more or less current than the others to
maintain the Voltage. The current cannot alter in one PSU alone as
they are in series, so at some point PSU number two tries to back off
the current as it sees the output Voltage increase.

I have not tried this, so I do not know what would happen practically.
I have seen power supplies used in parallel though, and this usualyy
ends in disaster.

HN