Powering the device without an AC/DC adapter in the field?

D

deepsweet2012-11-02 22:34:05

Do it yourself

deepsweet, 2012-11-02 22:34:05

Hello.
I will say right away that I managed to forget a lot in electrical engineering, so do not blame me for the possible naivety of the question and the obviousness of the answer :)
There is a device that comes with an AC / DC adapter with the following characteristics:

AC input: 100-240 V, 1.0 A
DC output: +5 V, 2.0 A
Output power: 10W MAX

I really want to use this device in the field, ie. without access to a power outlet.
What are the possible options?
The skills to hold the soldering iron in direct hands remained, but if there are ready-made and affordable solutions, then this is just wonderful.

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6 answer(s)

4

404, 2012-11-02
@404

You need a device that gives 5V, 2A. Something like this: www.alibaba.com/showroom/solar-charger-5v-2a.html

T

telegamochka, 2012-11-02
@telegamochka

A few years ago I bought AcmePower UC-5 for this purpose: www.computerra.ru/think/golub/352335/
Now there are new models - this one seems to be out of production.

Y

Yuri, 2012-11-03
@Byteler

It all depends on how much time per day the device should work.
If for a long time - a bicycle, a wind generator, flow (into the river), a solar battery + appropriate piping

L

lnx, 2012-11-03
@lnx

Nuven battery or other power source of sufficient power and a DC-DC converter, for example, to PWM. The scheme can be googled or ordered from the Chinese ready.
With a lower efficiency, you can use a conventional linear regulator such as UA7805 with a pair of capacitors or an adjustable LM117 / LM317, a calculator for it.

L

lubezniy, 2012-11-03
@lubezniy

If you need it for a long time, and there is no car nearby (from which, in principle, you can power it), it makes sense to think about some kind of gasoline or diesel generator. It may be cheaper to add fuel there than to periodically change / charge batteries and accumulators.

C

crrr, 2012-12-07
@crrr

2A this is not much, the simplest circuit on the LM1084IS5.0 from the datasheet. 2 capacitors of 100uF 25V, 1 LM1084IS5.0, and you will get a stabilizer with an input voltage of ~ 6.5-25V, that is, you can supply voltage from different types of batteries.
Only a small circuit will need to be installed on a radiator at least 10x10cm.
The efficiency, of course, is rather low ... But otherwise you need a DC / DC converter, and they are not very cheap, which is not easy to assemble (for a beginner).