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Open Hardware/Modding: Arduino, Raspberry Pi, and More
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Hackaday ☛ Hackaday Podcast Episode 338: Smoothing 3D Prints, Reading CNC Joints, And Detecting Spicy Shrimp
This week, Hackaday’s Elliot Williams and Kristina Panos met up over the tubes to bring you the latest news, mystery sound, and of course, a big bunch of hacks from the previous seven days or so.
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Linux Gizmos ☛ Nordic Semiconductor Expands nRF54L Series with High-Memory nRF54LM20A SoC
According to Nordic, the nRF54LM20A integrates a 128 MHz Arm Cortex-M33 processor, a 128 MHz RISC-V coprocessor, and an expanded peripheral set that includes high-speed USB and support for up to 66 GPIOs. It is equipped with 2 MB of non-volatile memory and 512 KB of RAM, offering headroom for complex applications such as Matter-based smart home devices without requiring external memory.
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Jeff Geerling ☛ I regret building this $3000 Pi AI cluster
Bottom line: this cluster's not a powerhouse. And dollar for dollar, if you're spending over $3k on a compute cluster, it's not the best value.
It is efficient, quiet, and compact. So if density is important, and if you need lots of small, physically separate nodes, this could actually make sense.
Like the only real world use case besides learning is for CI jobs or high security edge deployments, where you're not allowed to run multiple things on one server.
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Arduino ☛ This mint tin radio is a fresh take on emergency communication
This is a compact, portable FM radio small enough to fit in a Smint tin (Smint is like an Italian-Dutch Altoids alternative). It has an extendable antenna and a standard 3.5mm audio jack for connecting headphones. Power comes from a trio of LR42 coin cell batteries. The FM radio station is configured in firmware and it is important to choose a reliable frequency, such as for a local news channel. The single button controls powers to the entire device.
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Raspberry Pi ☛ KAMPi digital camera
KAMPi is a digital camera built using a Raspberry Pi Compute Module 5, a Raspberry Pi High Quality Camera, and a Waveshare Nano A Base Board, which is connected directly via GPIO to a Pimoroni HyperPixel 4.0″ Hi-Res Display. The camera is triggered by an Adafruit KB2040 (named so as it features our RP2040 chip!), which is connected to the Waveshare Nano A. My favourite part is the illuminated push button on top of the trigger switch.
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[Old] Kasiin ☛ 2025-08-04-Flipper_Zero_Geiger_Counter_Module — kasiin
This app gives you a graph view with counts per second (instantaneous measure of the radioactivity) as CPS and per minute as CPM.
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Purism ☛ Freedom by Design: Why Purism Rejects Big IT Status Quo
At Purism, we don’t bolt privacy on after the fact. We build it into the foundation.
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Purism ☛ When “Efficiency” Becomes Exposure: How DOGE Put America’s Identity at Risk
The Shared Responsibility Model is not a footnote. Break it, and you’re not just risking uptime. You’re putting lives, livelihoods, and national trust on the line.