Small Powerful Torch From Dropper Bottle

I had got some droppers usually used in medical treatment of eyes, nose etc.

One of them was big enough to house three AAA batteries.

So I used a 1w or 3w led and turned it into a torch. Yet powerful and easy to keep in car for emergency purposes

Place a AAA battery and note the size. Bottle should be a few mm higher so that a small aluminum piece can be attached to led. The reflector would be attached outside.

After measuring at appropriate position cut it

Small key ring torches are available I used its reflector. Cut it from below than sand it(Be careful scratches can appear inside if done roughly). So that led can enter it

take the led and wire it. Solder it in after confirming its working as you want. Take a button and attach wires. A two step button can provide 2 power options HIGH/LOW

Check it and complete by some finishing of rough edges. You can cover the front by some transparent plastic sheet.