Squeezing the last juice out of the battery

Alkaline batteries last quite a long time, but when their charge drops below one volt they become useless in most devices. Usually such batteries are thrown away. I suggest using battery energy more rationally and making a simple flashlight yourself that will work within 1-0.5 volts. Here is his device.

Please note that it shines quite brightly.

This is a regular converter for super bright LED. It is quite simple and requires a minimum of details.

I will not explain in detail how this converter works; you can find out about this in our previous article, where we made a similar design.

What we need:

The most important element in manufacturing is the transformer wound on a toroidal core. A similar core can be used, with a diameter from 0.5 to 3 centimeters with any magnetic permeability. The main thing is to wind it correctly, look carefully at the pictures.

Wire for winding with a diameter of 0.1 - 1 mm. Any transistor can be used, preferably with a lower opening voltage.

We collect:

Here's the scheme:

If everything is assembled correctly, the circuit starts working immediately without settings or adjustments. Be careful not to confuse the ends of the windings when connecting.