hey guys im kinda new to electronics and i need help powering an led.

The LED is 3.6 V and i want to power it with a battery pack that holds 4 AAA batteries. i know that 4 AAA's=6 V which is too much so i just want to use 2 batteries in the pack instead of four which makes 3 V which will power it enough. does anyone know how to do this?

 

Hello,

4 AAA "normal alkali" batteries will give 6 Volts, as each cell will give 1.5 Volts.
When you use NiMH or NiCad cells the voltage will be lower.
To power a led, you must know its voltage drop and its current.
Take a look at this page with led circuits:
http://www.educypedia.be/electronics/circuitsled.htm

Greetings,
Bertus

 

A brand new alkaline AA cell is 1.5V to 1.6V. Four in series make 6V to 6.4V, not 9V.

Your "3.6V" LED might be 3.2V or 3.8V or in between volts. It won't light with only 3V from two battery cells.

A solar garden light uses an electronic circuit to boost the 1.2V from a rechargeable battery cell to 3.6V to light a white or multi-colours LED.

Look in Google for Joule Thief. It is a small simple electronic circuit that boosts 1.5V to enough volts to light a 3.6V LED.

 

Try reading this, it cover the ground you're asking about...

http://forum.allaboutcircuits.com/showthread.php?p=117636#post117636

 

Hi,
I've found another circuit on
http://control7.net/electronics/single_cell_LED_flasher.html