Transistorgrab

Some time ago I built a bench power supply utilizing power supply modules DPS3003 which I bought on Aliexpress.

Some weeks ago I got a new oscilloscope Rigol DS1104Z and one of my first measurements was the output voltage of this power supply:

452

I own an older head-lamp (one that has a rubber band which you wear on your head) that still operated with a light bulb.

But LED technology has made impressive progress in recent years and therefore I had the idea to transform this lamp to a LED light source.

262