: SPI data transmission line from MCU to radio. Pass-through to the radio.
| | Typical Value | |---------------|-------------------| | Operate Time (energize to contact closure) | 10 ms | | Release Time (de-energize to contact open) | 5 ms | | Maximum Switching Frequency | 10 Hz (0.1 sec on/off) | | Mechanical Life | 10 million operations | | Electrical Life (rated load) | 100,000 operations |
This article breaks down the technical specifications, pin configurations, and typical applications associated with the YL105. What is the YL105? yl105 datasheet
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
serves as an intermediary breakout between the microcontroller and the transceivers. It passes the SPI communication lines directly through while intercepting the power rails to regulate them. Input Side (Connects to Microcontroller) : SPI data transmission line from MCU to radio
completely prevents this hazard by stepping down the voltage through its AMS1117-3.3 regulator. 2. Resolving Power Insufficiency
| | 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. | What is the YL105
Connect YL105 output to an interrupt pin. Count pulses per minute using a magnet attached to a rotating shaft.
If a timer isn't lasting the correct duration, the external capacitor connected to the timing pins has likely drifted in value or leaked.
The table below summarizes the key electromechanical properties found in a standard . Specification / Value Input Voltage (VCC_IN) 5.0V DC (Typical) to 12.0V DC (Maximum) Powers the onboard LDO regulator Output Voltage (VCC_OUT) 1.9V DC to 3.6V DC (Typically stabilized at 3.3V) Safe operating range for nRF24L01+ Onboard Voltage Regulator AMS1117-3.3 Linear Voltage Regulator Handles voltage step-down and heat dissipation Quiescent Current Consumption Baseline draw of the adapter board itself Module Dimensions 26 mm × 19 mm × 12 mm Compact footprint with a standardized 2×4 female socket Compatibility 8-pin nRF24L01 / nRF24L01+ / nRF24LD1 Accepts standard and PA/LNA long-range modules Pinout and Connection Configuration