[DuWayne] made a 63 dB step attenuator by putting two smaller units in series, with an Arduino Nano in control of them. With a 3D printed enclosure and OLED for feedback, the device is easily ...

"If you’re into DIY, woodworking, metalworking, or home improvement, April Wilkerson’s projects and step-by-step builds will inspire you to grab your tools and start creating something amazing.

The build starts with a basic high-voltage step-up kit that turns 4V DC into 15 kV at the output. At this voltage level, it’s possible to generate an arc in air. To create the Jacob’s ladder ...