Renesas RA2T1 low-power Cortex-M23 MCUs target BLDC/PMSM motor applications

Renesas has recently launched the RA2T1 group of low-power motor control MCUs, built around a 64 MHz Arm Cortex-M23, for low-cost single-motor applications like power tools, fans, and home appliances. Designed for Brushless DC Electric Motors (BLDC) and Permanent Magnet Synchronous Motors (PMSM), the RA2T1 supports both trapezoidal and FOC control techniques, thanks to its integrated 3-channel Sample and Hold (S&H) circuits that enable accurate 3-phase current detection. It also includes PWM shutdown features and various analog and digital peripherals in compact packages as small as 4×4 mm QFN. Previously, Renesas introduced the RA8T1, also a motor control MCU based...

Review of GL.iNet Comet (GL-RM1) KVM-over-IP solution and ATX power control board

GL.iNet sent me a Comet (GL-RM1) remote KVM box for review, along with a GL-ATXPC ATX Power Control Board. I’ll start this review with an unboxing and a teardown, then I’ll use the GL.iNet Comet with a Raspberry Pi 4 SBC to control it from a web browser in the LAN and the GLKVM app from the Internet. Finally, I’ll connect the GL-ATXPC and GL-RM1 to an Orion O6 mini-ITX motherboard to test ATX power control. GL.iNet Comet (GL-RM1) unboxing I received a parcel with two retail boxes: one for the GL-ATXPC ATX power control board and the other for...

RISC-V Embedded Board Features TH1520 SoC, Dual GbE, and 4TOPS AI

The HH-SCDAYU800A is another RISC-V development board built around the Alibaba T-Head TH1520 system-on-chip. With its dual Gigabit Ethernet ports, multiple camera interfaces, and industrial-grade design, the board targets applications requiring multimedia features, edge inference, and smart device integration. This board is implemented by RunKaiHong Digital Tech, a company based in Nanjing, China, though little […]

TermDriver 2 is a USB-to-serial adapter with a built-in color display (Crowdfunding)

USB-to-serial debug boards are commonly used for board bring-up, checking for issues when a board does not boot, or accessing the serial console in systems without networking or video output. You’d just connect GND, Tx, and Rx wires to the target board, and a USB cable to the host, before running a terminal program like Putty, Minicom, or Bootterm with the correct parameters, and you should be good to go. That’s the theory, but sometimes Tx and Rx may be inverted, the baudrate is not advertised, and so on. So Excamera Labs decided to make the TermDriver 2, an improved...

RISC-V-Based FireBeetle 2 with ESP32-P4 Starts at $11.90

The FireBeetle 2 ESP32-P4, previewed earlier this year, is now available from DFRobot starting at $11.90. This compact board handles real-time image processing and video streaming, combining the ESP32-P4 SoC with an ESP32-C6 co-processor for wireless projects. The board uses a 360 MHz dual-core RISC-V processor with single-precision FPU and AI instruction extensions, enabling the direct […]

Radxa Fanless Network Router Offers 4 GbE Ports and NVMe Storage Up to 4TB

The Radxa E24C is a fanless network computer based on the Rockchip RK3528A processor, designed for routing, edge networking, and industrial tasks. It combines four RJ45 ports, 4K HDMI output, and an M.2 NVMe slot for high-speed storage in a compact enclosure. The Radxa E24C uses the same RK3528A processor found in the Radxa E52C […]

Upgrading an M4 Pro Mac mini's storage for half the price

Upgrading an M4 Pro Mac mini's storage for half the price

A few months ago, I upgraded my M4 Mac mini from 1 to 2 TB of internal storage, using a then-$269 DIY upgrade kit from ExpandMacMini.

At the time, there was no option for upgrading the M4 Pro Mac mini, despite it also using a user-replaceable, socketed storage drive.

But the folks at M4-SSD reached out and asked if I'd be willing to test out one of their new M4 Pro upgrades, in this case, upgrading the mini I use...

M5Stack Stamp-S3A WiFi and BLE IoT module benefits from optimized antenna design, lower power consumption

M5Stack Stamp-S3A, also known as M5StampS3A, is an update to the M5Stamp S3 ESP32-S3 module introduced in 2023 with an optimized antenna design, lower power consumption, a larger user button, and a different logic for the RGB LED control. Other features remain the same with 8MB Flash, RGB LED, input button, and 23 GPIOs all in a tiny 26 x 18mm form factor. Two versions are available: the Stamp-S3A without pre-soldered headers and the Stamp-S3A PIN1.27 with headers soldered on the board and an orange heat-resistant cover. M5Stamp-S3A specifications: WiSoC – Espressif Systems ESP32-S3FN8 CPU Dual-core 32-bit Xtensa LX7 microcontroller...

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Отжившие свой век, электровакуумные приборы (ЭВП) тем не менее в ограниченных и специальных случаях применяются и поныне, не говоря о моде на «ламповый звук» и цифровые индикаторы тлеющего разряда. Находит своих поклонников и любительское кустарно-лабораторное электровакуумное дело — как техническое ретрохобби — забава весьма сложная и многогранная: это и вакуумная техника, и химия, физика, электроника, и стеклодувное дело, и работа с высокими температурами и экзотическими материалами. Даже изготовление простой, более или менее современной, заводской лампы накаливания насчитывает сотни операций, повторять которые в точности для любителя и затруднительно, и не нужно. В этом смысле полезно бросить взгляд назад, к истокам, во времена появления...