To replace the AC power of my alarmclock with batteries...

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nr38449

New Member

• Mar 11, 2011

• #1

Hi!
I'm sick and tired of not beeing able to find a decent alarmclock that runs on batteries. I've finally managed to find one which doesn't play shitty music on underdimensioned speakers each morning - only to find that it's to far to the AC-outlet.

In Sweden we use 230 V 50 Hz AC, and in the bottom of the clock it also says 6 W. Inside is som kind of powerunit, possibly for converting the AC to DC - that's at least what I hope. But on the circuitcard it says AC1 and AC2 where the cords coming from the powerthing are attached.

Can I power my watch with batteries, and how to do it?

For this I basically have batteries, batteryholders, sauderingequipment and a screwdriver.

Help, anyone?

 

tcmtech

Banned

Most Helpful Member

• Mar 11, 2011

• #2

You may be sick and tired but what about ambitious enough to do a google search for " Battery powered alarm clock"?

Amazon.com: Elgin Battery Powered LCD Alarm Clock with Nap Timer 3408E – Silver: Electronics

$10.06 and ships world wide.

Or you could just buy an extension cord too.

 

Last edited: Mar 11, 2011

MikeMl

Well-Known Member

Most Helpful Member

• Mar 11, 2011

• #3

Dont overlook that the clock likely requires the 50Hz AC Power for time keeping.

 

N

nr38449

New Member

• Mar 11, 2011

• #4

Yeah, well. I've been to every electronicsstore in town and the only ones thar are batterypowered are too ugly. Like Donald-Duckstyle... Amazon doesn't ship overseas...

 

N

nr38449

New Member

• Mar 11, 2011

• #5

Oh, so you mean that the AC is actually its definition of time?

 

irbirb

Member

• Mar 11, 2011

• #6

nr38449 said:

Oh, so you mean that the AC is actually its definition of time?

Click to expand...

yep, it's pretty normal (and simple) for the 50 or 60Hz line voltage to use for the timing.

 

MikeMl

Well-Known Member

Most Helpful Member

• Mar 11, 2011

• #7

nr38449 said:

Yeah, well. I've been to every electronicsstore in town and the only ones thar are batterypowered are too ugly. ...

Click to expand...

You sound like my wife! We have the "form over function" argument all the time...

 

tcmtech

Banned

Most Helpful Member

• Mar 11, 2011

• #8

Amazon doesn't ship overseas...

Click to expand...

Unless the Sweden you live in is not on this planet its in their international shipping list as a valid shipping destination.

Amazon.com Help: International Shipping

 

N

nr38449

New Member

• Mar 11, 2011

• #9

Heh, well that's what happens when you have to many sisters

A friend just told me that it might be possible but that the clock probably isn't designed to preserve power and therefore will use a lot of batteries. So for now I guess I'll give this quest up and just get a tacky extention cord (yes, the form-over-function-thing again) instead. Unless somebody deliveres a breakthrough I shall continue to hammer manufacturers with my request of a good looking clock with:

illuminated display with digital time
short snoozetime
fairly loud alarm
no radio
BATTERYPOWERED tech

Cost must be below 130 dollars Yes, I'm desperate!

 

N

nr38449

New Member

• Mar 11, 2011

• #10

Oh, thanks. I'll check amazon out then

 

audioguru

Well-Known Member

Most Helpful Member

• Mar 11, 2011

• #11

Why do you need an portable alarm clock when you are on a camping vacation away from the civilized world that has AC electricity?

 

RODALCO

Well-Known Member

• Mar 16, 2011

• #12

6 Watt is a lot of power to supply from batteries.

Most likely the display is the big user of electricity 10 mA per led segment x 28 if four 8888's are lit = 280 mA max.

AC1 and AC2 are outputs from the transformer or mains !! be careful if you are not 100% sure.
the "thingy" is most likely a bridge rectifier.

I see this is post nr. 1000 !

 

Last edited: Mar 16, 2011