DC voltage doubler

Other Hardware General Electronics
1

Hello,

for my project i have to dublicate DC voltage of power source.
I'd like to hear some advices, since there are many options in google.
power source is simple 1.5V AA battery, and i want from it to get 3V. it would be great for many projects.

thank you in advance.

2

Is there an Arduino in the circuit ?
I remember that someone build a circuit to start an ATmega (or ATtiny) chip with 1.5V and uses a voltage pump (with diodes and capacitors) to increase the Vcc for the ATmega (or ATtiny) chip itself.

You could buy a DC-DC converter.

Or you could build a DC-DC converter yourself. A transistor with an inductance (and some resistors and capacitors) is all you need.
There are circuits like that to make a white led shine bright with a 1.5V battery.

3

i'd prefer to build it on my own, could you give me schematics.
i would be thankful.

4

Charge pump

5

Plan B;-

TI has one Application Report - Simple 1.5-V Boost Converter for MSP430 note1.

D1 & D2 – 1N34A Germanium Diodes

http://www.ti.com/lit/an/slaa105/slaa105.pdf

Note1 : The MSP430 is a 16-bit, ultra-low power, mixed signal microcontroller from Texas Instruments.

6

Plan C:

Pololu Adjustable Boost Regulator

  • output voltage range: 2.5 - 9.5 V
  • input voltage range : 1.5 V - 16 V (the input voltage should be kept below the output voltage).
  • current up to: 2 A

Pololu Adjustable Boost Regulator, $11.95

7

Make sure that whatever you are trying to power with this will not be hurt by EMI (Electromagnetic Interference)

Switching mode power supplies are cool, but if built imperfectly they can emit a lot of EMI. I built one that would make a digital scale go crazy from five feet away. You can certainly do it yourself, but there are a lot of nasty things that can crop up if you don't know what you are doing. This is why I tend to buy my switching mode power supplies pre-assembled. There is a reason that the consultants I know who design these make a good living. That said, if you are just lighting some LEDs and want to stick it to the FCC then by all means give it a go.

8

thank all of you. I am really thankful

i'll try to do my own, but for sale i think is great offers, so i'll by one.
no, i want it to supply standalone microprocessor using minimal battery pack.

thank you once more.

9

This is a popular one:-
http://www.ladyada.net/make/mintyboost/