Wolfgang Schmidt (3)

1-01-2015 | Sure, you can easily buy an LED flashlight at the hardware store. But where's the fun in that? This DIY LED flashlight offers up to 78.8% ef...

1-07-2013 | A step-up or boost converter circuit converts a low voltage into a higher value output voltage. With an input voltage in the range from 8 to...

1-07-2004 | A simple NiCd charger can be built using ‘junk box’ components and an inexpensive LM317 or 78xx voltage regulator. Using a current limiter c...