VoltJots Issue 35

Issue 35

Author

VoltJots
April 03, 2025

Welcome to the latest edition of the VoltJots newsletter, linking you to the very best electronics and IoT news, products, and projects.

Hope you enjoy! Until next week,

VoltJots

NEWS & ARTICLES

The Open Hardware Summit is heading to Edinburgh, May 30th and 31st, featuring awesome speakers, workshops, and a chance to showcase your hardware!

A team of Rice University engineers has developed a more efficient and compact power amplifier that could help speed up wireless networks for 5G and beyond.

The Wheatstone bridge detects tiny resistance changes using a setup of four resistors, allowing for accurate readings for various sensor applications.

Mazda and ROHM are teaming up to develop new automotive components using next-generation gallium nitride (GaN) power semiconductors

PROJECTS & TUTORIALS

Take a loot at this beginner-friendly, step-by-step guide to getting started with the Zephyr RTOS on the Raspberry Pi Pico 2.

The Pi Pico Rx lets you build a simple yet powerful SDR receiver using a Raspberry Pi Pico, an analogue switch, and an op-amp, capable of picking up signals from half-way around the world.

Build an ESP32-based vintage-style thermometer with a tri-color E-paper display and also get real-time temperature, humidity, and pressure monitoring through a web dashboard.

Sachin Soni has turned a Makerfabs ESP32-S3 AMOLED display module into a wearable UPI payment device — just scan the QR code to split lunch.

Build your own portable console that lets you play retro games anywhere, using a Raspberry Pi Zero 2 W.

PRODUCTS

The ESP32-S3 Smart Audio devkit combines a 1.85-inch round touchscreen with Wi-Fi, Bluetooth, and audio capabilities.

This Mini-PCIe Module is a compact, long-range Wi-Fi solution that's perfect for IoT and industrial applications, offering reliable connectivity up to 1 km through walls.

The Raspberry Pi PoE+ Injector lets you easily add Power-over-Ethernet support to your network for just $25.

xMEMS has developed a silicon micromachined earbud speaker that eliminates the need for a booster amplifier.

The TSC1801 is a super-fast, low-side current-measurement amplifier designed for motor control, solar power, and automotive applications, allowing for precise pulse-by-pulse current control and rapid over-current detection.

The AHE300 and AHE10x sensors are super sensitive magnetic field detectors that nail down rotation speed, current, and angular position for everything from home gadgets to industrial setups.

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