The **XH-R** series typically refers to the **XH-M** and **XH-W** line of low-cost, hobbyist electronic modules (often misidentified or grouped under XH-R due to common labeling on voltage regulators and relay modules). These are pre-assembled PCB units used for power management and environmental control. --- ## 1. Core Categories of XH-R/XH-M Modules The most common modules found in this series fall into three functional categories: | Category | Typical Model | Function | Key Components | | :--- | :--- | :--- | :--- | | **Voltage Regulation** | XH-M401 | Steps voltage down (Buck) | XL4016 IC, Potentiometer, Inductor | | **Temperature Control** | XH-W3001 | Switches power based on temp | Thermistor (NTC), Relay, Microcontroller | | **Battery Protection** | XH-M603 | Charging control module | Zener diodes, Relays, Segment Display | --- ## 2. Key Electronic Components Breakdown Regardless of the specific model, these boards share several fundamental electronic parts: ### A. Integrated Circuits (The Brains) * **Voltage Regulators:** Most "XH" power boards use the **XL4015** or **XL4016**. These are high-efficiency DC-DC buck converters capable of handling up to 8A. * **Microcontrollers:** Temperature and timing modules often use the **STM8S** or **STC** series 8-bit MCUs to process sensor data and drive the display. ### B. Switching Components * **Electromagnetic Relays:** Used in XH-W series to act as a physical switch for high-voltage (110V/220V) appliances. * **MOSFETs:** Found in XH-M power modules to perform high-speed switching for voltage conversion. ### C. Feedback and Control * **Precision Potentiometers:** Blue multi-turn resistors (trimmer pots) used to calibrate output voltage or current limits. * **Schottky Diodes:** Used for rectification and protecting the circuit from reverse polarity. --- ## 3. Common Specifications (Reference Table) If you are working with a standard XH-R style power module, the specs usually align with the following: | Feature | Standard Range | | :--- | :--- | | **Input Voltage** | 4V - 40V DC | | **Output Voltage** | 1.25V - 36V DC (Adjustable) | | **Max Current** | 5A - 8A (Depending on heatsink) | | **Efficiency** | Up to 94% | --- ### Safety Note > **Warning:** Many XH-series modules (especially temperature controllers) are designed to switch AC Mains power (110V/220V). Always ensure the device is unplugged before touching the screw terminals to avoid electrical shock.