DIY bicycle headlight

The holder connects to the bicycle with a zip tie;

It has room to take a small boost converter to adjust voltage to 12V;

The LED module is salvaged from an old LED halogen replacement; the aluminum heart sink body directly screws into the holder.

The light shield snaps to the top too direct light away from your face.

…Powerful result, also fine for riding in the forest when lights going down!

I use this with my 18650 power pack!

https://www.prusaprinters.org/prints/136336-bicycle-18650-power-pack

Such string für entsprechende LED / boost converter bei eBay:

"led 3w spot strahler e14"

“boost converter sx1308”