chip to step down 5V input to the 3.3V required by the transceiver. Voltage Range : Accepts a input and outputs a stable 1.9V to 3.6V DC Capacitance
: Includes integrated bypass capacitors to filter power noise, which is essential for reliable radio transmission. Dimensions : Approximately 26 x 19 x 12mm Compatibility : Specifically designed for the variety of the nRF24L01+ module. yl105 datasheet
| | Likely Cause | Solution | |-------------|------------------|---------------| | Relay does not click | No power on VCC | Check 5V and GND connections. | | Relay clicks but load doesn’t turn on | Wrong wiring (NC vs NO) | Load should be connected to COM and NO. | | Random toggling | Floating input pin | Use a pull-down (active HIGH) or pull-up (active LOW) resistor (10kΩ). | | Microcontroller resets when relay activates | Power supply insufficient | Relay coil draws ~80mA. Use a separate 5V supply for module. | | Jumper setting ignored | Poor contact | Remove/insert jumper multiple times or solder the desired connection. | chip to step down 5V input to the 3
| | Min | Typ | Max | Unit | |---------------|---------|---------|---------|----------| | Supply Voltage (VCC) | 4.5 | 5.0 | 5.5 | V DC | | Input High Voltage (IN - HIGH mode) | 3.0 | 5.0 | 5.5 | V | | Input Low Voltage (IN - LOW mode) | 0 | 0.8 | 1.5 | V | | Input Current (IN pin) | – | 5 | 15 | mA | | Relay Coil Current | – | 70 | 90 | mA | | Total Module Current | – | 85 | 110 | mA | | | Microcontroller resets when relay activates |
Note: Some variants have a solder bridge instead of a jumper. Check your module carefully.