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The YL-105 (also known as YL105) is a popular 5V to 3.3V VCC Adapter Board specifically designed for the nRF24L01+ wireless module. It solves the common issue where microcontrollers like the Arduino Uno (5V) cannot directly power the nRF24L01+ (3.3V) reliably due to current spikes. Technical Specifications
Input Voltage: 5.0V DC (compatible with 51 microcontroller and Arduino systems). Output Voltage: Stable 1.9V to 3.6V DC (typically 3.3V). Operating Current: Approximately 12.3 mA.
Voltage Regulator: Integrated AMS1117-3.3 chip for low-dropout regulation.
Compatibility: Supports the standard 8-pin nRF24L01+ and nRF24L01 PA LNA modules. Dimensions: 26 x 19 x 12 mm. Pinout and Connection Guide
The YL-105 features a dedicated 8-pin socket for the wireless module and a 6-pin/header interface for connection to your microcontroller. Pin Name Description Connection to Microcontroller (e.g., Arduino) VCC Power Input Connect to 5V pin (The board regulates it to 3.3V) GND Connect to GND CE Chip Enable Connect to any digital pin (e.g., D7) CSN Chip Select Connect to any digital pin (e.g., D8) SCK Connect to D13 (Standard SPI SCK) MOSI SPI Master Out Connect to D11 (Standard SPI MOSI) MISO SPI Master In Connect to D12 (Standard SPI MISO) IRQ Optional (Not always required for basic setups) Key Advantages
Power Stability: Includes onboard filter capacitors to minimize power supply noise, which is the primary cause of connection failures in 2.4GHz transceivers.
Convenience: Eliminates the need for external voltage dividers or dedicated 3.3V power supplies that may not provide enough current on certain Arduino clones.
Level Shifting: While the power is regulated, the SPI data lines (CE, CSN, SCK, MOSI) on the nRF24L01+ are generally 5V tolerant, making this board a bridge between 5V logic and 3.3V power.
The YL-105 is an RF device; it needs an antenna to work properly. Most
(often styled as YL105) typically refers to a specific breakout board adapter designed for the nRF24L01+ wireless transceiver module
. It acts as a voltage regulator and interface stabilizer to make these modules compatible with 5V systems like the Arduino Uno. 1. Key Technical Specifications
The YL-105 board simplifies power management for the nRF24L01, which is notorious for being sensitive to power fluctuations. Arduino Forum Input Voltage : 5V DC (typically from an Arduino 5V pin). Output Voltage : 1.9V to 3.6V DC (regulated by an onboard AMS1117-3.3 Operating Current : Approximately 12.3 mA during active RX mode. Compatibility : Designed for 8-pin nRF24L01+ modules. Protection
: Includes onboard bypass capacitors to filter power noise, which is a common cause of communication failure in RF projects. Arduino Forum 2. Pinout & Connection Guide When using the
, you connect your 5V power source to the adapter, and the adapter provides the safe 3.3V power to the nRF24L01 Instructables Typical Arduino Pin Description Power Input (5V is safe with this adapter) Instructables Instructables Chip Enable (can be any digital pin) Instructables SPI Chip Select (can be any digital pin) Instructables Instructables SPI Master Out Slave In Instructables SPI Master In Slave Out Instructables 3. Usage Best Practices Voltage Safety : While the nRF24L01 chip itself requires 3.3V, the breakout allows you to use the more common 5V rail safely
. Never connect 5V directly to the nRF24L01 pins without this adapter. Library Selection RF24 library on GitHub
is the standard for these modules and is highly recommended for stability. Troubleshooting yl105 datasheet better
: if you see "00" or "FF" in your serial monitor, it usually indicates a wiring issue or a lack of power. The YL-105's onboard capacitors help prevent the common "reboot loop" caused by the nRF24L01's sudden power spikes. Arduino Forum 4. Alternative "YL105" Device
In industrial water monitoring, "YL105" may also refer to the FST100-YL105 , a digital Residual Chlorine Sensor
Arduino and NRF24L01 : 6 Steps (with Pictures) - Instructables
The YL-105 is a common breakout board used to interface the nRF24L01 wireless transceiver with 5V microcontrollers like the Arduino Uno. While standard nRF24L01 modules require 3.3V, the YL-105 features an onboard voltage regulator, allowing it to safely handle a 5V power supply. Key Specifications & Pinout
The YL-105 typically has two rows of pins: one side for the nRF24L01 module and the other for your microcontroller. Arduino Connection (Example) VCC 4.8V – 12V DC input GND CE Chip Enable (Active High) Digital Pin 7 CSN SPI Chip Select (Active Low) Digital Pin 8 SCK Digital Pin 13 MOSI Master Out Slave In Digital Pin 11 MISO Master In Slave Out Digital Pin 12 IRQ Interrupt Request Optional (Digital Pin 2) Essential Usage Tips
Voltage Regulation: The main benefit of the YL-105 is its AMS1117-3.3 regulator. Even though the breakout board takes 5V at the VCC pin, the nRF24L01 module itself will receive a steady 3.3V, protecting its sensitive radio circuits.
Decoupling Capacitors: Cheap nRF24L01 modules often suffer from power noise. While the YL-105 includes some filtering, adding a
capacitor across the 3.3V and GND pins of the module itself can significantly improve communication stability.
SPI Configuration: Ensure your code (using libraries like RF24) correctly defines the CE and CSN pins. While MOSI, MISO, and SCK are fixed to your hardware's SPI pins, CE and CSN can usually be assigned to any digital pin.
Industrial Maintenance: For large-scale projects involving sensor networks, you can track your wireless equipment using the Mobility Work CMMS app to manage hardware files and preventive maintenance.
Supply Chain: If you are using these modules in a defense or high-reliability setting, tools from Brady Europe can help maximize supply chain efficiency and part authentication. Educational Visualization
This graph illustrates the typical SPI communication timing between the microcontroller (Master) and the YL-105 (Slave).
For advanced wireless projects, consider the Arduino and NRF24L01 tutorial for step-by-step wiring instructions. Maximise supply chain efficiency | BradyID.com
Finding a datasheet for the specific part YL105 can be difficult as it is often a generic or localized part number used in specific regions or by smaller manufacturers.
Depending on your application, you are likely looking for one of the following components often associated with similar alphanumeric codes: The YL-105 (also known as YL105) is a popular 5V to 3
Potential Match 1: Battery Protection IC (1-Cell Lithium-Ion)
The "105" series is a common designation for single-cell lithium-ion battery protection ICs. These are used to prevent overcharging, over-discharging, and over-current.
Key Specs: Usually detects overcharge at ~4.2V and over-discharge at ~2.5V.
Alternative Part: The S-821AA series or the LC05111CMT are common industry standards for this function. Potential Match 2: LED Driver IC (TPS61050/TPS61052)
If your "YL105" is a small SMD component in a lighting circuit, it might be a variation of the TPS61050, a high-power white LED driver. Application: Flashlight drivers or display backlighting.
Features: Integrated 1.2-A synchronous boost converter with I2C interface for brightness control. Potential Match 3: LDO Voltage Regulator (NCP105) If used for power regulation, it may refer to the , a 150 mA Low Dropout (LDO) regulator. Input Voltage: 1.7V to 5.5V.
Common Use: Stable voltage supply for mobile phones or GPS devices. How to Confirm Your Part Since "YL" can be a manufacturer-specific prefix:
Check the Package: Is it a SOT-23 (3 or 5 pins), a DFN, or a larger SOIC package?
Circuit Location: Is it directly connected to a battery (Protection), an LED (Driver), or providing power to a microcontroller (LDO)?
Logo Search: Look for a specific manufacturer logo on the chip (e.g., a stylized "T" for Texas Instruments or "ON" for onsemi).
Could you describe the package type (number of pins) or the device this part came from to narrow down the exact datasheet? AI responses may include mistakes. Learn more S-821AA Series BATTERY PROTECTION IC FOR 1-CELL PACK
This will help me provide a more accurate and relevant response.
is a dedicated adapter board designed to simplify the use of wireless modules with 5V microcontrollers like the Arduino Uno
. Its primary informative feature is its ability to provide a stable, high-current power supply that the standard 3.3V pins on many microcontrollers often cannot maintain. Makerlab PH Key Features & Specifications The datasheet highlights for the YL-105 include: Voltage Regulation : Features an on-board AMS1117-3.3
voltage regulator chip to convert 5V–12V input down to a stable 3.3V for the radio. Power Stability : Includes integrated bypass capacitors What type of component is the YL105 (e
(often 10µF) to filter noise and handle the sudden current spikes required during wireless transmission, which prevents module resets or communication failures. Socket Design : Provides a standardized 8-pin female header
for the nRF24L01 module, making it "plug-and-play" and resolving the difficulty of connecting to the module's non-breadboard-friendly pins. Current Capacity : Supports a maximum current of up to
, ensuring it can easily power even high-power "PA+LNA" (antenna) versions of the nRF24L01. Arduino Forum Technical Parameters Typical Value Input Voltage 4.8V – 12V DC (5V recommended) Output Voltage 3.3V DC (fixed) Current Consumption <6mA (idle/standby without module) Dimensions ~26mm x 19mm x 12mm Operating Temperature -40°C to +125°C Usage Notes
Arduino and NRF24L01 : 6 Steps (with Pictures) - Instructables
NRF24L01 Voltage Regulator Adapter: This is the most frequent use of the "YL-105" designation. It is used to provide a stable 3.3V power supply to the power-hungry NRF24L01 wireless module when connected to a 5V source like an Arduino.
Infrared Motion Sensor Alarm: A standalone security device designated as YL-105 that uses passive infrared (PIR) technology to detect movement and trigger an alarm.
Industrial/Material Parts: The code is also used by manufacturers like Alpha Wire for heat shrink tubing and L-com for water quality sensors used to measure residual chlorine. What Makes a "Better" Datasheet?
A "better" or more professional datasheet for these items should include:
Pinout Diagrams: Clear labeling of VCC, GND, and data pins to prevent short circuits.
Electrical Characteristics: Precise input voltage ranges (e.g., 4.8V to 12V for the regulator) and output stability metrics.
Mechanical Dimensions: Exact physical sizes for PCB mounting or enclosure design.
Regulatory Compliance: Standards like UL 224, CSA, or RoHS compliance for industrial applications.
For advanced technical details, you can find the Alpha Wire YL105 Specification Sheet on DigiKey or the L-com SRWQ100-YL105 Sensor Data via Octopart.
F2211IN YL105 Alpha Wire | Cables, Wires - DigiKey Australia
The YL-105 datasheet ignores cable capacitance. If your cable to the sensor exceeds 30cm, readings drop by 10%.
While 9600 is standard, some modules ship with different default baud rates (1200, 2400, or 115200). If you see garbage characters in the Serial Monitor (e.g., �), your baud rates do not match. Try changing mySerial.begin(9600); to other standard rates to see if the data clears up.
The designation YL-105 typically refers to a common, low-cost IR (Infrared) obstacle avoidance sensor module used in Arduino, Raspberry Pi, and robotics projects. The "datasheets" widely available for this module are often inadequate—lacking electrical characteristics, timing diagrams, or thermal data. This write-up identifies the core component (the LM393 comparator and the IR emitter/detector pair) and provides a methodology for assembling a "better datasheet" by consulting manufacturer data for the underlying ICs and optical components.
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Swallow Salon Presents Haven Rae and Giselle Palmer Giving H--d and Swallowing