After visiting the large graffiti walls near his workshop in Berlin, Niklas Roy wanted to get involved by constructing a machine that can do the painting for him. In its most basic form, the system — which Roy calls the Graffomat — consists of two axes that work together to paint either vector or raster images.
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In this video we will be having a look at a very versatile component, the TL431 IC. I used it in the feedback loop of my DIY switched mode power supply and thus got interested in it. That is why I will show you how it works, how you can use it in lot of different circuits and also how it functions in feedback loops of for example voltage converters. Let’s get started!
Designed with modularity in mind, this build wasn’t exactly straightforward — and Kent discusses the troubleshooting stage in detail.
Engineer Sam Kent has designed a modular Eurorack-compatible stereo DJ mixing system, featuring XLR and line-level outputs, a cuing system, and volume meters.
“Inspired by Eurorack modular synthesizers and the boutique mixer market, the project aims to design and build a simple and customisable DJ mixer,” Kent explains. “The design is op-amp based, with filters implemented as 12db/oct active inverting filters, 10k ohm output impedances, and buffered potentiometers acting as voltage dividers for the controls.”
Using math to create digital songs on a PCB the size of a cassette tape.
One look at the MMXX T-APE from PhonicBloom, and you know for sure it creates exciting music. The cassette tape form factor may suggest analog sound. However, it generates sounds digitally using a trick up its reels. The primary sound creation mode relies on fractals, not samples! (Although it does support samples and wavetables too.)
I’ve previously built several robot dogs which used a variety of servos and brushless motors. The most agile robot dogs are the ones with back-drivable low-ratio reducers which allows the motor to be back-driven so we get some natural spring in the legs – which can be controlled on the fly with software. So it’s time for openDog V3 – this version uses my Cycloidal Drives which I’ve developed over the last few months. I will eventually publish the CAD and code as open source when it works.
The Hackaday comments section has become infamous for a recurring theme that goes something like “I don’t know why they used an Arduino, they could have done it with a 555 timer!” If you’ve ever thought the same way, then this post is for you!
What is The Most Important Device In The Universe, then? It’s the Modern Props #195-290-1, a movie prop originally built in the 1970’s. It’s a product of the creative mind of [John Zabrucky] who founded Modern Props in 1977 to serve Sci-Fi television and movie productions that wanted to invent the future with their props. Known for their high quality and impeccable craftsmanship, Modern Props’ products were in demand until the day they closed the doors so that [John] could retire.
This time I will show you how to make a simple Arduino oscilloscope. The maximum signal frequency that the oscilloscope can display is 20 kHz, and the maximum input voltage is 5 V without a voltage divider.
Altium Designer: https://altium.com/yt/greatscott!
WARNING!: Do not replicate the experiment showcased in the video!
Previous video: https://youtu.be/ZswJoAvbuzY
How Does Wireless Charging Work? video: https://youtu.be/ExU32UyGX6w
DIY Wireless Energy Transfer System video: https://youtu.be/3E5PUnYlaTM
The flexible, waterproof design could be used for many applications, including wearable healthcare devices and scuba diving equipment.
Researchers from Soongsil University in Seoul have developed a flexible, waterproof sensor that can be used for submerged wearable applications, including scuba diving gear, healthcare devices, smart textiles, and more.
According to their recently published paper, the team demonstrated using the pressure sensor to control a phone, such as playing music and taking pictures, while fully immersed in water. They also incorporated the sensor into a flexible face mask, which could track the breath rate of a wearer by detecting air movement inside the mask.
Boston Dynamics has unveiled an upgrade for its quadrupedal Spot robot, Spot Release 3.0, which offers new autonomy functionality, AI-powered data collection, and the ability to operate the arm remotely — even opening doors.
“We’ve been working closely with Spot users in asset-intensive industries to operationalize the robot on their sites,” the Boston Dynamics team writes of the new upgrade. “With Spot Release 3.0, we’ve added flexible autonomy and repeatable data capture, making Spot the data collection solution you need to make inspection rounds safer and more efficient.”
