It’s 1979 – What Exactly Did That ∫ Key Do?

[Michel Jean] asked a question few others might: what exactly is going on under the hood of a classic HP scientific calculator when one presses the ∫ key? A numerical integration, sure, but how exactly? There are a number of useful algorithms that could be firing up when the integral button is pressed, and like any curious hacker [Michel] decided to personally verify what was happening.

[Michel] implemented different integration algorithms in C++ and experimentally compared them against HP calculator results. By setting up rigorous tests, [Michel] was able to conclude that the calculators definitely use Romberg-Kahan, developed by HP Mathematician...

NXP i.MX 937 cost-effective Cortex-A55/M7/M33 MPU is a drop-in replacement for NXP i.MX 95 SoC family

The 1 .4 GHz NXP i.MX 937 quad-core Cortex-A55 microprocessor (MPU) for HMI and Edge AI applications aims to fill the gap between entry-level NXP i.MX 93 SoCs and higher-end parts like the NXP i.MX 952 processor family, while offering pin-to-pin compatibility with the latter. The i.MX 937 MPU also features a dedicated 667 MHz Arm Cortex -M7 for real-time workloads and a low-power Arm Cortex-M33 core for system management tasks, supports LPDDR4x or LPDDR5 memory, integrates an Arm Mali G310 3D GPU, a VPU for 1080p H.26x video encoding and decoding, and a 2 eTOPS NXP eIQ Neutron NPU...

Clear Resin Casting Replicates Old Acrylic for Selectric Repair

https://invidious.privacyredirect.com/watch?v=PeIq8qOVnxE

IBM Selectric typewriters have a lot of unique parts that can be tricky to source, but one we didn’t think of was the clear acrylic(?) dust covers, that are apparently very hard to find in good shape. [Eric Strebel] has a few Selectrics that all have issues with these parts. While you could come close to recreating this piece with acrylic sheeting carefully bent to match the original shape, [Eric] has a different hammer to try in a new video: replicating it with a resin casting.

He uses de-gassed tin-cure silicone to create a mold for the original, with a bit...

There Are No LEDs Around the Face of This Clock

https://invidious.privacyredirect.com/watch?v=EoxLeMWrfeo

This unusual clock by [Moritz v. Sivers] looks like a holographic dial surrounded by an LED ring, but that turns out to not be the case. What appears to be a ring of LEDs is in fact a second hologram. There are LEDs but they are tucked out of the way, and not directly visible. The result is a very unusual clock that really isn’t what it appears to be.

The face of the clock is a reflection hologram of a numbered spiral that serves as a dial. A single LED – the only one visibly mounted – illuminates this hologram...

Turning a GDB Coredump Debug Session Into a Murder Mystery

Debugging an application crash can oftentimes feel like you’re an intrepid detective in a grimy noir detective story, tasked with figuring out the sordid details behind an ugly crime. Slogging through scarce clues and vapid hints, you find yourself down in the dumps, contemplating the deeper meaning of life and  the true nature of man, before hitting that eureka moment and cracking the case. One might say that this makes for a good game idea, and [Jonathan] would agree with that notion, thus creating the Fatal Core Dump game.

Details can be found in the (spoiler-rich) blog post on how the...

Raspberry Pi CM0-based industrial AI camera features motorized auto-focus system, 12-pin Ethernet/RS-232/DO aviation connector

At Embedded World 2026 in Germany, EDATEC launched the ED-AIC1000, a compact industrial AI camera built around the Raspberry Pi CM0 and designed for machine vision and industrial automation applications, such as quality inspection, object detection, and production-line monitoring. It integrates a 1.3 MP global-shutter camera with a sampling rate of up to 120 FPS, along with motorized autofocus M12 lenses, and three independently configurable lighting zones for reliable imaging. The camera also integrates a 12-pin M12 industrial connector that provides 24 V power input, 100 Mbps Ethernet, RS-232, a trigger input, and an isolated digital output. The system supports...

BeagleBadge – A Linux-powered 4.2-inch ePaper badge based on TI Sitara AM62L32 SoC

The BeagleBoard.org Foundation has just introduced the BeagleBadge featuring a 4.2-inch ePaper display and a Linux-capable Texas Instruments Sitara AML62L32 dual-core Cortex-A53 SoC. It’s quite feature-rich for a badge, as it offers WiFi 6, Bluetooth 5.4 LE, and LoRa/LoRaWAN connectivity, various motion and environmental sensors, a USB 2.0 host port, Mikrobus, Grove, and QWIIC expansion connectors, a 4-way joystick, a buzzer, and a range of buttons and LEDs. BeagleBadge specifications: SoC – Texas Instruments Sitara AM62L32 dual-core Arm Cortex-A53 processor @ 1.25GHz System Memory – 256 MB (128M x 16bit) LPDDR4 @ 1600 MHz Storage 4GB eMMC flash 256Mbit OSPI...

NXP i.MX 93W wireless MPU SiP pairs dual-core Arm Cortex-A55 processor with NXP iW610 WiFi 6, Bluetooth LE, and 805.15.4 radio

NXP i.MX 93W is the company’s first integrated wireless MPU System-in-Package (SiP) and combines a dual-core Cortex-A55 processor (NXP i.MX 93) with an iW610 WiFi 6, Bluetooth LE, and 802.15.4 tri-radio into a single chip. The 14.2 x 12 mm package also includes all the external radio components needed for wireless connectivity, replacing up to 60 discrete components on the PCB. NXP says it reduces the PCB area, simplifies PCB design and regulatory approval, and speeds up time-to-market. NXP i.MX 93W specifications: CPU Dual-Core Arm Cortex-A55 at up to 1.7 GHz Arm Cortex-M33 core at 250 MHz for real-time control GPU...

Makerfabs CM0IQ – An ultra-compact (42x36mm) Raspberry Pi CM0 Lite board

The CM0IQ is an ultra-compact board based on the Raspberry Pi CM0 Lite Compute Module. It measures just 42 × 36 mm and squeezes multiple interfaces into a 15.1 cm² footprint, making it suitable for space-constrained applications such as robotics, IoT devices, and custom hardware integrations. Despite being smaller than a Raspberry Pi Zero 2 W (19.5 cm²), the CM0IQ manages to include a full-sized USB-A port, a Micro HDMI port, and 4-lane MIPI CSI and DSI connectors. To fit everything into this small footprint, the designer also relied on a 1.27 mm 40-pin GPIO header rather than the standard...

Arduino expands lineup with Ventuno Q board pairing Dragonwing IQ8 and STM32H5

Arduino has introduced the Ventuno Q, a development board designed for robotics, embedded computing, and edge inference workloads. The platform combines a high-performance application processor with a real-time microcontroller in a dual-processor architecture intended for systems that process data and control physical hardware simultaneously. The board integrates a Qualcomm Dragonwing IQ-8275 processor, which provides CPU, […]