IEEE Spectrum is the flagship publication of the IEEE — the world’s largest professional organization devoted to engineering and applied sciences. Our articles, videos, and infographics inform our readers about developments in technology, engineering, and science.
Enjoy more free content and benefits by creating an account
Saving articles to read later requires an IEEE Spectrum account
The Institute content is only available for members
Downloading full PDF issues is exclusive for IEEE Members
Downloading this e-book is exclusive for IEEE Members
Access to
Spectrum
's Digital Edition is exclusive for IEEE Members
Following topics is a feature exclusive for IEEE Members
Adding your response to an article requires an IEEE Spectrum account
Create an account to access more content and features on
IEEE Spectrum
, including the ability to save articles to read later, download Spectrum Collections, and participate in
conversations with readers and editors. For more exclusive content and features, consider
Joining IEEE
.
Join the world’s largest professional organization devoted to engineering and applied sciences and get access to
all of Spectrum’s articles, archives, PDF downloads, and other benefits.
Learn more about IEEE →
Join the world’s largest professional organization devoted to engineering and applied sciences and get access to
this e-book plus all of
IEEE Spectrum’s
articles, archives, PDF downloads, and other benefits.
Learn more about IEEE →
Create an account and get exclusive content and features:
Save articles, download collections,
and
post comments
— all free! For full access and benefits,
subscribe
to Spectrum.
IEEE Spectrum is an award-winning technology magazine and the flagship publication of the IEEE, the world’s largest professional organization devoted to engineering and the applied sciences.
At ICRA 2024, Spectrum editor Evan Ackerman sat down with Unitree founder and CEO Xingxing Wang and Tony Yang, VP of Business Development, to talk about the company’s newest humanoid, the G1 model.
Smaller, more flexible, and elegant, the G1 robot is designed for general use in service and industry, and is one of the cheapest—if not the cheapest—of a new wave of advanced AI humanoid robots.
Stephen Cass is the special projects editor at IEEE Spectrum. He currently helms Spectrum's Hands On column, and is also responsible for interactive projects such as the Top Programming Languages app. He has a bachelor's degree in experimental physics from Trinity College Dublin.
Follow along as we build and test one of our favorite kits of all time, the Discrete 555 Timer! Build a huge version of one of the most iconic and surprisingly versatile integrated circuits of all time from transistor and resistors.
The 555 chip has been used at one time or another by nearly every E.E. alive, and you can use it to detect pulses, make lights blink, debounce inputs, trigger alarms, and even make music (terrible music, but music nonetheless!). We first wrote up the kit in our Hands On column in Spectrum, and this is second version, which features some improvements over the original.
Chapters:
00:00 Introduction and hello! 00:39 The 555 integrated circuit 01:05 Inside the 555 02:24 Oscillator mode applications 03:06 Origin of the 555 03:28 Unboxing the Discrete 555 timer kit 04:28 Comparing the 555 kit to the 555 chip 05:21Soldering 05:54 Kit creator Eric Schlaepfer and his book “Open Circuits” 07:00 Problems with my jig! 07:33 The voltage divider 10:06 Inside Tea 13:05Transistors 13:44 Cleaning up the leads 14:44 Silkscreen details 20:43 Radio Shack soldering iron magic goo 22:54 Getting the decorative legs on 24:36 555 chip test circuit 25:15 Wiring in the 555 kit
Evan Ackerman is a senior editor at IEEE Spectrum. Since 2007, he has written over 6,000 articles on robotics and technology. He has a degree in Martian geology and is excellent at playing bagpipes.
Michael Koziol is the news manager at IEEE Spectrum. Previously, he was an associate editor covering telecommunications. He graduated from Seattle University with bachelor's degrees in English and Physics, and earned his master's degree in science journalism from New York University.
Eliza Strickland is a senior editor at IEEE Spectrum, where she covers AI, biomedical engineering, and other topics. She holds a master’s degree in journalism from Columbia University.
With 360-degree video, IEEE Spectrum puts you aboard drones that are flying high above the Tanzanian landscape: You’ll ride along as drones soar above farms, towns, and the blue expanse of Lake Victoria. You’ll also meet the local entrepreneurs who are creating a new industry, finding applications for their drones in land surveying and delivery. And you’ll get a close-up view from a bamboo grove as a drone pilot named Bornlove builds a flying machine from bamboo and other materials.
You can follow the action in a 360-degree video in three ways: 1) Watch on your computer, using your mouse to click and drag on the video; 2) watch on your phone, moving the phone around to change your view; or 3) watch on a VR headset for the full immersive experience.