Tuesday, March 26, 2019

How to light up 24 LEDs using 1 x AA battery 1.42 volt - The most powerful joule thief circuit

This is one of the most efficient Joule thief circuit capable of powering up 24 LEDs using a single AA battery at 1.4 volts. The components are very simple and cost less than 2 dollars to make except for the breadboard.

4 x 82uH inductors
2 x 1N4007 Diodes
1 x 5.6KOhms resistors
2 x 10nF ceramic capacitors
1 x Breadboard

The maximum voltage for the circuit is around 3 volts to 3.5 volts - anything more than that could fried the transistors. I have yet to test the minimum voltage to power up the 24 LEDs and if this can goes to the lowest minimum like 700 mV then it can be powered up using normal chemical reaction such as Vinegar, Lemon, etc.

This is the illustrated schematic - click to enlarge

After soldered on permanent circuit board - it's a small circuit as big as thumb finger.

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