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Mico: A PDM to USB Microphone Based on the Raspberry Pi RP2040
Using RP2040 to create a USB audio microphone.
New
The latest blog posts to take off on Hacker News. 4,807 posts.
Hardware & Electronics
Any year
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Reverse-engineering a tiny 1980s chip that plays Christmas tunes
For the holidays, I decapped a chip that plays three Christmas melodies. The UM66T melody chip from the 1980s was designed for application...
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Practical Transformer Winding (2010)
Instructions on how to design, calculate and build power transformers.
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Apple to Apple Comparison: M1 Max vs. Intel
Unum builds the Search, Storage, and Networking engines powering the modern data stack. Deployed on 100M+ devices, our technology serves DBMS unicorns and frontier AI labs.
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Raspberry Pi holds its own against low-cost ARM NAS
Earlier this year, I pitted the $549 ASUSTOR Lockerstor 4 NAS against a homebrew $350 Raspberry Pi CM4 NAS, and came to the (rather obvious) conclusion that the Lockerstor was better in almost every regard. Well, ASUSTOR introduced a new lower-cost NAS, the $329 Drivestor 4 Pro (model AS3304T—pictured above), and sent…
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Upgrading a motherboard’s BIOS/UEFI (the hard way)
A couple of weeks ago I found a really good deal on a Socket AM4 motherboard that supports the newest AMD Ryzen CPUs. The motherboard is an ASRock A520M/ac . It’s a very basic motherboard which doesn’t appear to be sold by any of the usual retailers anymore, but I couldn’t pass up on the deal, especially with the…
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Writing embedded firmware using Rust
AnyLeaf Articles: Writing embedded firmware using Rust
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There oughta be a WiFi Game Boy cartridge
It took a while, but I finally managed to create my own Game Boy cartridge. With WiFi! At this point, it can only demo a simple telnet-style communication and access Wikipedia articles, but I am confident that I will showcase more in the future. For now, the interesting and surprisingly tricky part is how the thing…
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IBM and Samsung Unveil Semiconductor Breakthrough
IBM and Samsung Electronics jointly announced a breakthrough in semiconductor design utilizing a new vertical transistor architecture that demonstrates a path to scaling beyond nanosheet, and has the potential to reduce energy usage by 85 percent.
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Pine64 and Radxa's new Pi CM4-compatible boards
Since the Raspberry Pi was introduced, hundreds of clones have adopted the Pi's form factor (from the diminutive Zero to the 'full size' model B). Often they have better hardware specs, and yet they remain a more obscure also-ran in that generation of Single Board Computer (SBC). So when I saw Radxa's CM3 and Pine64's…
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Raspberry Pi Zero 2 W external antenna mod
We've barely scratched the surface of the Pi Zero 2's capabilities. [Brian Dorey] shows us how to hack your Pi's WiFi and improve its performance. A u.FL footprint can be discovered in line with the onboard WiFi antenna, implying that someone had to connect an external antenna.
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Fixing a Tiny Corner of the Supply Chain
No product gets built without at least one good supply chain war story – especially true in these strange times. Before we get into the details of the story, I feel it’s worth understanding a bit more about the part that caused me so much trouble: what it does, and why it’s so special.
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Apple’s Newest OLED Supplier
BOE Technology
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Yamaha DX7 chip reverse-engineering, part 4: how algorithms are implemented
The Yamaha DX7 digital synthesizer (1983) was the classic synthesizer in 1980s pop music. It uses two custom digital chips to generate sou...
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Yamaha DX7 reverse-engineering, part III: Inside the log-sine ROM
The Yamaha DX7 digital synthesizer (1983) was the classic synthesizer for 1980s pop music. It used two custom digital chips to generate so...
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Miniature 3456 LED Cube
For some reason, I’m intrigued by LEDs. Indeed, they can be found in pretty much all of my projects. I was recently inspired by one of Greg Davill’s projects, a miniature LED cube boasting a total of 3456 LEDs . After pondering about it for a while, I decided I’d attempt building one myself. This post describes the…
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Ikea Vindriktning Air Quality Sensor Review and Accuracy
How accurate is Ikea's Vindriktning air quality sensor? This review covers PM2.5 behavior, limitations, and how it compares with better monitors.
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Colour-changing magnifying glass gives clear view of infrared light
By trapping light into tiny crevices of gold, researchers have coaxed molecules to convert invisible infrared into visible light, creating new low-cost detectors for sensing.
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Graviton2 and Graviton3
What do modern cloud workloads look like? And what does that have to do with new chip designs? I found these gems in Peter DeSantis's ReInve...
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ADSL works over wet string (2017)
Broadband services are a wonderful innovation of our time, using multiple frequency bands (hence the name) to carry signals over wires (us...
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Amazon EC2 M1 Mac Instances
14 November 2022: This blog has been updated to remove the link to the preview form. Last year at AWS re:Invent, Jeff Barr wrote about the exciting availability of Amazon Elastic Compute Cloud (Amazon EC2) Mac instances. Today, we’re announcing the preview of a new EC2 M1 Mac instance. The introduction of EC2 Mac…
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New SiFive RISC-V core P650 with 40% IPC increase
The SiFive Performance P650 processor is expected to be the fastest licensable RISC-V processor IP core in the market, bringing RISC-V into new markets and applications, and will debut to lead partners in Q1 2022.
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Bosch gives go-ahead for volume production of silicon carbide chips
Reutlingen, Germany – They are small, powerful, and extremely efficient: semiconductors made of silicon carbide (SiC). After several years of development, Bosch is now starting volume production of power semiconductors made of this innovative material, supplying automotive manufacturers worldwide. In the future, more…