Need electronic experts pointers...

S

Seraphina Lee

Guest
Dear all,

I am an electronic hobbyist... beginner :) ... and have mainly
theoratical knowledge of electronics. I've decided to design and
build, what i call, a BBU. I'm not sure if this is going to tedious
but i'm willing to give it a try. I've found so far 1 schematic
diagram and the reason i'm posting here is because i would like to
gather more pointers regarding the BBU or perhaps links to any other
'royalty free' schematic diagrams which fulfils the following;-

Design Philosophy
The purpose of this Battery Back-up Unit (BBU) is for the back-up of
equipment such as (aquarium... maybe fridges at a later stage)
especially motor loads during power outage. During normal conditions,
the battery will be charged through a 13A switch socket outlet. The
equipment will be attached in series with this BBU unit. When a power
disruption occurs, this unit will cut out the charging unit and will
deliver power to the load via a Lead Acid Battery which is on stand-by
mode. There will be an interruption during this switch over. When the
power supply is available, the BBU will switch the load supply from
Battery to main power supply. Then the battery charger will charge the
battery that has been consumed. When the battery is fully charged,
trickle charging mode will be selected automatically to ensure a
healthy battery for next power outage.

Tech Details
Battery Charger input source: 240VAC 50Hz 13A Plug-Top*
Battery Charger Output Current: 5A
Charging Algorithm: 1. Trickle Charge 2. Bulk Charge 3. Over-Charge
4. Float Charge
Battery: Lead Acid 12VDC (Maintenance Free Battery)

Inverter
DC Input: 12VDC**
Rated Continuous Power Output: 500W
Max Surge Power Output: 1000W
AC Output Waveform: Square Wave
AC Output source: 240VAC 50Hz 13A Switch Socket Outlet*
Frequency Output: 50Hz

Options
*Variable input 220 - 240VAC 50Hz
*Variable input 110 - 120VAC 60Hz
**24VDC

Would appreciate it if some kind soul out there could point to me to a
site (which either sells or gives out free schematic diagrams) which
does the above. Other pointers / tips before start of work would also
be appreciated even though many have told me that it's extremely
simple to create :) It's always the case of 'easier said than done' to
me..

Many Thanks,
Seraphina L.
seraphina_lee_my@yahoo.com
 
Seraphina Lee <seraphina_lee_my@hotmail.com> wrote:
Dear all,

I am an electronic hobbyist... beginner :) ... and have mainly
theoratical knowledge of electronics. I've decided to design and
build, what i call, a BBU. I'm not sure if this is going to tedious
Click to expand...
It's not a beginners project.
Buy a UPS.

It's trivial to blow stuff up in the circuit.
And you only need to do that 4-5 times before you get close to the cost
of a new one.
 
On Sunday 26 September 2004 08:05 am, Seraphina Lee did deign to grace us
with the following:

Dear all,

I am an electronic hobbyist... beginner :)
....
Tech Details
Battery Charger input source: 240VAC 50Hz 13A Plug-Top*
Battery Charger Output Current: 5A
Charging Algorithm: 1. Trickle Charge 2. Bulk Charge 3. Over-Charge
4. Float Charge
Battery: Lead Acid 12VDC (Maintenance Free Battery)

Inverter
DC Input: 12VDC**
Rated Continuous Power Output: 500W
Max Surge Power Output: 1000W
AC Output Waveform: Square Wave
AC Output source: 240VAC 50Hz 13A Switch Socket Outlet*
Frequency Output: 50Hz

Options
*Variable input 220 - 240VAC 50Hz
*Variable input 110 - 120VAC 60Hz
**24VDC

You're joking, right?
Click to expand...
 
On Sunday 26 September 2004 08:30 am, Ian Stirling did deign to grace us
with the following:

Seraphina Lee <seraphina_lee_my@hotmail.com> wrote:
Dear all,

I am an electronic hobbyist... beginner :) ... and have mainly
theoratical knowledge of electronics. I've decided to design and
build, what i call, a BBU. I'm not sure if this is going to tedious

It's not a beginners project.
Buy a UPS.

It's trivial to blow stuff up in the circuit.
And you only need to do that 4-5 times before you get close to the cost
of a new one.
Click to expand...
With the prices I've seen, you couldn't buy the _parts_ for what
you can get a new one for.

Cheers!
Rich
 
Rich Grise <null@example.net> wrote:
On Sunday 26 September 2004 08:30 am, Ian Stirling did deign to grace us
with the following:

Seraphina Lee <seraphina_lee_my@hotmail.com> wrote:
Dear all,

I am an electronic hobbyist... beginner :) ... and have mainly
theoratical knowledge of electronics. I've decided to design and
build, what i call, a BBU. I'm not sure if this is going to tedious

It's not a beginners project.
Buy a UPS.

It's trivial to blow stuff up in the circuit.
And you only need to do that 4-5 times before you get close to the cost
of a new one.

With the prices I've seen, you couldn't buy the _parts_ for what
you can get a new one for.
Click to expand...
I know I could.
But I'd be sourcing a fair amount from my scrap-pile, and perhaps the
scrapyard + battery tester for batteries.

However.
Doesn't always work this way.
Just built a couple of stereo 12V bridged amps, for about 1/2 the
cost of a new one, to go into a couple of PCs and drive unamped speakers.

(bolted the amp chips onto the heatsink, then soldered other bits to them).

Even if I'd bought all the bits, rather than just the actives, I'd have
still made a fair saving.

You've got to know your limits though.
 
On Sun, 26 Sep 2004 17:15:04 GMT, Rich Grise <null@example.net> wrote:

|On Sunday 26 September 2004 08:05 am, Seraphina Lee did deign to grace us
|with the following:
|
|> Dear all,
|>
|> I am an electronic hobbyist... beginner :)
|...
|> Tech Details
|> Battery Charger input source: 240VAC 50Hz 13A Plug-Top*
|> Battery Charger Output Current: 5A
|> Charging Algorithm: 1. Trickle Charge 2. Bulk Charge 3. Over-Charge
|> 4. Float Charge
|> Battery: Lead Acid 12VDC (Maintenance Free Battery)
|>
|> Inverter
|> DC Input: 12VDC**
|> Rated Continuous Power Output: 500W
|> Max Surge Power Output: 1000W
|> AC Output Waveform: Square Wave
|> AC Output source: 240VAC 50Hz 13A Switch Socket Outlet*
|> Frequency Output: 50Hz
|>
|> Options
|> *Variable input 220 - 240VAC 50Hz
|> *Variable input 110 - 120VAC 60Hz
|> **24VDC
|>
|You're joking, right?


I was thinking the same Rich...

It seems to me that for a "beginner hobbyist" in electronics the
precise detail of the specification is somewhat too well described for
a person of his supposed expertise.

A Troll perhaps?
 
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