IIH Innovation Factory Open Day


1:30 PM - 4:30 PM

IR211, South Campus XJTLU


  • Theme: Digital Invisible Ruler DIY
  • Date: 9 March 2024
  • Venue: IR211, South Campus XJTLU
  • Language: Chinese
  • Organizer: XJTLU International Innovation Hub, XJTLU Maker Space

On Saturday, March 9, 2024, XJTLU International Innovation Hub will host the Innovation Factory Open Day. At this event, participants will have the opportunity to explore the wonderful world of the Digital Invisible Ruler and learn about its potential.

The Digital Invisible Ruler is a small smart device that has no scale, triangular ruler or straightedge shape, but has a convenient measuring function. It utilizes an ultrasonic sensor to measure the distance between a plane and a target for non-contact measurement. The ultrasonic transmitter emits ultrasonic waves in a certain direction and starts timing. When the ultrasonic waves propagate in the air and meet with obstacles, they are immediately reflected back, and the ultrasonic receiver stops timing when it receives the reflected waves, and displays the measured distance through a digital tube, realizing the working principle of the invisible ruler.

In this Innovation Factory Open Day, participants will learn how the Digital Invisible Ruler works, take part in hardware assembly, and also learn how to write a program to adapt to the Arduino Uno motherboard. The activity covers open-source hardware programming, hand assembly and programming debugging: the shell of the invisible ruler is made by laser cutting, and the ultrasonic signals are processed and information is displayed with the help of microcontrollers (e.g. Arduino Uno motherboard). Participants were able to fully understand the realization path of e-Science and Technology and experience the charm of science and technology in depth.


Time Content
13:30 - 13:45 Explains the path to realizing the production of e-Science Creation
13:45 - 14:15 Explain the working principle and assembly process of digital invisible ruler
14:15 - 15:15 Hardware Programming Introduction
15:15 - 16:15 Manual assembly of products and programming debugging
16:15 - 16:30 Project showcase


If you are interested in this event, please scan the QR code to sign up.


1. The number of places for this event is limited, and the successful applicants will receive our e-mail confirmation letter.

2. Participants need to bring their own laptops.

3. Participants are required to download the Mixly software on their computers in advance. (If the download is unsuccessful, the instructor will provide a link to download the software on the day of the event)

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