Accessories Archives -

JL-AD3W-HT-V3 – Everything You Need to Know About This AC-DC Power Supply Module

The JL-AD3W-HT-V3 is a compact AC-to-DC power supply module commonly found in low-cost embedded electronics, IoT devices, and DIY projects. It converts mains voltage directly into a regulated low-voltage DC output, typically 5 V, making it a popular alternative to bulky wall adapters or external power bricks. This article covers the JL-AD3W-HT-V3 as a hardware component: what it is, how it […]

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The Ultimate Guide to the BL0942 Energy Meter IC

Accessories, Blog / Achim Pieters

The BL0942 is a highly integrated, calibration-free single-phase energy metering IC designed for smart plugs, smart sockets, power strips, and energy-aware appliances. It provides accurate measurement of active power, voltage RMS, current RMS, line frequency, and zero-crossing information, while supporting both pulse output and register-based digital interfaces. Often compared with the popular BL0937, the BL0942 is not merely a pin-compatible refresh, but a more capable, register-driven metering IC intended

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The Ultimate Guide to the BL0937 Energy Meter IC

Accessories, Blog / Achim Pieters

The BL0937 is a highly integrated, cost-effective single-phase energy metering IC designed for modern smart sockets, power strips, and intelligent appliances. Engineered for accuracy, stability, and simplicity, it enables precise measurement of active power, voltage RMS, and current RMS using only a handful of external components. Whether you are a hobbyist building a smart plug

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The Complete Guide to the 1.28-Inch GC9A01 Round TFT Display Module

Accessories, Blog / Achim Pieters

Circular displays are a unique twist for DIY electronics projects. While most LCDs are square or rectangular, the 1.28-inch round TFT display gives your project a modern, smartwatch-like look. It’s based on the GC9A01 controller, offers a 240×240 full-color IPS panel, and connects over SPI. In this guide we’ll explore what it is, how to wire it, how to drive

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The Complete Guide to the HC-SR501 PIR Motion Sensor

Accessories, Blog / Achim Pieters

When it comes to detecting motion in DIY electronics, the HC-SR501 PIR sensor is one of the most popular and affordable choices. It’s used everywhere: alarm systems, automatic lights, smart home devices, and even art installations. In this guide we’ll cover how the sensor works, its specifications, wiring, configuration, and how to use it with

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2.25 inch TFT LCD ST7789 SPI Display

Accessories, Blog / Achim Pieters

The 2.25 inch TFT LCD ST7789 SPI display is a compact but powerful module, perfect for all kinds of embedded projects. Whether you are using an ESP32, Arduino, or Raspberry Pi, this screen allows you to display sharp, colorful graphics. In this article, we will take a closer look at the specifications, pinout, and how

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The Complete Guide to the BH1750 Digital Light Sensor

Accessories, Blog / Achim Pieters

When you need to measure light intensity in your projects — whether it’s for smart lighting, weather stations, or battery optimization — the BH1750 is one of the easiest and most reliable sensors to use. It’s a small, inexpensive I²C module that outputs light levels directly in lux, without the need for complex calibration or

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The Ultimate Guide to the SHT Sensor Series

Accessories, Blog / Achim Pieters

The SHT temperature and humidity sensors from Sensirion are among the most precise, reliable options out there for measuring environmental conditions. Whether you’re building a weather station, monitoring your greenhouse, or adding climate control to a smart home device, the SHT line offers features you need — with minimal fuss. In this guide, you’ll get

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The Complete Guide to the HLK-LD2410 24GHz Human Presence Radar Module

Accessories, Blog / Achim Pieters

If you’re building smart home systems, motion detection, lighting automation, or occupancy sensors, a radar module like the HLK-LD2410 offers a lot more than a standard PIR sensor. It can detect both moving and micro-movements (breathing, sitting still, slight motion), output distance estimates, provide configurable sensitivity, etc. In this guide we’ll go through what it is, how

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The Complete Guide to the RC522 RFID Module

Accessories, Blog / Achim Pieters

RFID technology is everywhere: access cards, metro tickets, contactless payments, and smart locks. For makers, one of the easiest ways to experiment with RFID is the RC522 module. It’s a low-cost 13.56 MHz RFID reader/writer that works with tags, key fobs, and cards. In this guide we’ll explore what the RC522 is, its specifications, wiring,

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