Gikfun Electronic Hourglass led Diy Kits Welding Practice Board Blue Ray EK1886

Features

• This is a beautiful electronic hourglass that is fun to build and nice to look at when finished, it is not only a PCB board for practicing welding skills, but also a decorative gift for you.
• Comes with English user manual and online PDF file, which will guide you how to finish step by step, perfect for school basic electronics experiment projects.
• The suite adopts double layer PCB, and the circuit consists of 30 pieces white LED blue ray.
• Under the control of MCU program, it displays analog hourglass image.
• Power Supply Voltage:3.3-5V