With this circuit you can flash some LEDs for your rc airplanes or any other uav just like the real strobe navigation lights ...

Ring with sparkling crystal beads - diy wire jewelry 170. You can flexibly change the material to suit the material you have. Change the number of beads, bead size, and color to create your own ...

CreativeLab] bought a cheap arbitrary waveform generator and noted that it only had a two-pin power cord. That has its ups ...