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CC1101 868MHz SPI RF Module – Complete Guide

The CC1101 868MHz SPI RF module is a compact, low-power sub-GHz transceiver widely used in IoT, industrial telemetry, home automation and custom RF networks. The module is based on the CC1101 from Texas Instruments and offers significantly more flexibility than simple ASK/OOK transmitter modules. In this complete guide we cover: What is the CC1101? The CC1101 is a programmable sub-GHz RF

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esp32 – HomeKit Bathroom Ventilation Controller

When we renovated our bathroom, a new ventilation unit was installed — including a wireless remote control. Sounds convenient. In reality… not so much. The remote was constantly misplaced, forgotten, or — even worse — the battery was empty again. And surprisingly fast. That meant the ventilation was either running unnecessarily or not running when

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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

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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ESP32 – Power Plug with Energy Meter

For many years, the Dutch retailer Action has sold affordable smart‑home devices under the LSC Smart Connect brand. These products are extremely popular due to their low price point, but internally the hardware is often far more capable than expected. Earlier generations frequently used ESP8266 modules, which made reflashing and custom firmware relatively easy. Newer hardware revisions, however, increasingly rely

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The Ultimate Guide to the BL0937 Energy Meter IC

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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