VoltJots | Electronics and IoT

NEWS & ARTICLES

A battery-free implant to provide non-addictive pain relief

USC's new UIWI stimulator offers a battery-free, wireless solution for pain relief, using ultrasound to power it and machine learning to adjust stimulation based on real-time pain levels.

Affordable humanoid robot you can build in a week!

Using 3D-printed parts and off-the-shelf components, Berkeley Humanoid Lite opens up robotics for beginners and developers, and all for about $5,000. [image]

Europe's medical sensor revolution

Companies are rolling out cutting-edge medical sensors for infection testing, heart monitoring, and DNA analysis, with innovations like graphene transistors providing accurate home diagnostics for conditions like COVID-19 and influenza.

Can microchannels and two-phase cooling really keep chips cool?

Microchannels embedded in chips allow water to flow through for efficient heat transfer, but two-phase cooling takes it up a notch by using water’s phase change and latent heat to boost heat dissipation even further.

A practical take on remote variable resistors

Remote variable resistors let you control analogue circuits from a distance, using voltage-controlled resistors that adjust resistance based on applied voltage, typically using a field effect transistor for precise control.

Mastering DRC to dodge PCB layout blunders

Design Rule Check (DRC) helps you catch layout mistakes like trace width issues and pad sizes early, ensuring your PCB meets electrical and manufacturing standards for a successful build.

PROJECTS & TUTORIALS

Build a Raspberry Pi UV sensor with the VEML6075

Connect the VEML6075 UV sensor to your Raspberry Pi and use Python with Adafruit’s library to easily read UVA and UVB values and calculate the UV index.

Tutorial: flip-flops in digital electronics

Understanding flip-flops as essential 1-bit memory devices makes them key players in digital electronics.

Miniature FM radio redefined with a watch-style design

This tiny, wearable FM radio features a 3cm touch display and uses the RDA5807M FM stereo radio module.

Indoor and outdoor home weather station

Build a cool tabletop weather station that shows indoor and outdoor temperature, humidity, and pressure using Arduino Giga, BME280, and Open Weather Map for real-time data.

Build your own thermal camera with Raspberry Pi and the AMG8833 sensor

This project lets you create a thermal camera that detects temperature patterns using the AMG8833 sensor, offering 64 pixels of infrared measurement with a 60-degree viewing angle and a temperature range of 0°C to 80°C. [image]

Ekoplazm: Arduino Delay Module for Synths

Ekoplazm is a simple Arduino Nano-based delay module for modular or standalone synths, offering six selectable delay times and a reversible effect for adding depth to any sound.

ESP32 with APDS9960 Proximity, Light, RGB, and Gesture Sensor

Get started with the ESP32 and APDS9960 sensor for gesture detection, proximity sensing, and RGB light measurement using Arduino IDE.

PRODUCTS

AI-focused MCUs embed neural processor

Renesas’ RA8P1 MCUs pack an Arm Ethos-U55 NPU for AI/ML tasks, hitting 256 GOPS at 500 MHz, plus dual CPU cores for over 7300 CoreMark points and up to 35× more inferences per second compared to the Cortex-M85 alone.

STM32WBA5MMG: a tiny IoT m

odule with BLE 6.0 and more

STMicro STM32WBA5MMG packs Bluetooth LE 6.0, Zigbee 3.0, and OpenThread in a tiny 12.5×8 mm module, featuring an Arm Cortex-M33 CPU, 1MB Flash, and robust security for easy integration into IoT and smart home projects.

22V Class-D amps with smart power control

Two powerful 22V stereo Class-D amplifiers idle at just 6mW, with the MAX98415A offering 27W output and built-in speaker protection hardware, while the MAX98425A delivers around 1W — both designed to save power by adjusting supply voltage to match the audio signal.