The YL-105 module typically features a standard 2.54mm pitch header (usually 8 pins).
| Pin Number | Pin Name | Description | | :--- | :--- | :--- | | 1 | GND | Ground (Power Supply Negative) | | 2 | VCC | Power Supply (1.9V – 3.6V) | | 3 | CSN | SPI Chip Select (Active Low) | | 4 | SCK | SPI Clock Input | | 5 | MOSI | SPI Data Input (Master Out Slave In) | | 6 | MISO | SPI Data Output (Master In Slave Out) | | 7 | GIO1 | General Purpose I/O / Interrupt Pin 1 | | 8 | GIO2 | General Purpose I/O / Interrupt Pin 2 |
(Note: Pin numbering may vary slightly depending on the specific PCB revision, but GND/VCC are usually on the ends. Always verify with the silkscreen on your specific board.)
int hallPin = 2; int ledPin = 13; int hallState = 0;void setup() pinMode(hallPin, INPUT); pinMode(ledPin, OUTPUT); Serial.begin(9600);
void loop() hallState = digitalRead(hallPin); if (hallState == LOW) // active low typical digitalWrite(ledPin, HIGH); Serial.println("Magnet detected"); else digitalWrite(ledPin, LOW); delay(100);
If the jumper is installed, the relay activates when IN = LOW. The wiring is identical, but logic is reversed.
digitalWrite(relayPin, LOW); // relay ON
digitalWrite(relayPin, HIGH); // relay OFF
How does the YL105 compare to similar modules?
| Feature | YL105 | SRD-05VDC-SL-C (bare relay) | KY-019 | Songle 1-channel | |-------------|-----------|--------------------------------|------------|----------------------| | Opto-isolated | Yes | No | Yes | Yes | | Active LOW/HIGH selectable | Yes (jumper) | No | Fixed HIGH | Fixed LOW | | LED indicators | Power + Status | None | Power + Status | Power + Status | | Screw terminals | Yes (3 pins) | No | Yes (3 pins) | Yes (3 pins) | | Typical price | $2–$4 | $1 | $3–$5 | $2–$4 |
The YL105 is essentially a clone of the common 1-channel opto-isolated module, but the jumper for trigger logic selection makes it more versatile than fixed-logic boards.
The "YL105" designation typically refers to Alpha Wire's specific color and packaging code for their FIT-221 series heat shrink tubing in Yellow. Product Overview: Alpha Wire F2211IN YL105
This is a general-purpose, irradiated polyolefin heat shrink tubing designed for electrical insulation and mechanical protection. Technical Specifications Feature Material Irradiated Polyolefin (PO) Shrink Ratio 2:1 (Shrinks to 50% of original diameter) Supplied Diameter 1.000" (25.40mm) Recovered Diameter 0.500" (12.70mm) Min. Shrink Temp Full Recovery Temp Operating Temp to Voltage Rating Key Features
Durability: Offers high tensile strength (1500 psi) and resistance to common fluids and chemicals. yl105 datasheet
Flame Resistance: Meets UL 224 VW-1 and CSA 198 standards (except for clear versions).
Flexibility: Maintains flexibility after shrinking, making it suitable for wire bundling and strain relief. Ordering Code Breakdown (YL105) According to Alpha Wire's part numbering system: F2211IN: FIT-221 series, 1-inch diameter. YL: Color code for Yellow.
105: Packaging code (Put-Up), typically indicating a specific quantity of 4-foot lengths (e.g., 5 pieces).
For full compliance and detailed physical properties, you can reference the official Alpha Wire Master Catalog or technical data from distributors like DigiKey and Mouser. Alpha Wire F2211IN YL105 - Heat Shrink Tubing - Utmel
A: Since YL105 is a generic module name, no single "official" PDF exists. Use this guide along with the datasheet of the actual Hall IC on your module (e.g., AH3144, SS441A, or OH137).
The YL-105 is a staple in the Arduino and robotics hobbyist community. Unlike a simple magnetic switch (which only detects presence/absence), the YL-105 is a linear analog Hall sensor paired with a comparator to offer both analog (magnetic field strength) and digital (threshold trigger) outputs. The datasheet, typically a 1-2 page document from generic Chinese manufacturers, is sparse but covers the essentials.
Key Specifications (from the typical datasheet):
The yl105 datasheet may not exist as a single official document, but the electrical, mechanical, and timing specifications are well-defined by the components that make up this ubiquitous relay module. With its opto-isolated design, jumper-selectable logic, and 10A switching capability, the YL105 is an excellent choice for hobbyist and industrial applications alike.
Whether you are automating your home, building a robot, or designing a safety cutoff, the YL105 offers a reliable bridge between the fragile world of microcontrollers and the demanding realm of high-power electronics. Always respect the voltage ratings, adhere to proper wiring practices, and consult the SRD-05VDC-SL-C and PC817 datasheets for deeper technical insight.
Final Reminder: When working with AC mains voltage (110V/230V), take all necessary safety precautions. Use insulated enclosures, avoid live testing, and never leave the module powered while unattended.
Need more technical specifics? Leave a comment or refer to the component-level datasheets linked in Section 9. Happy switching!
is a common socket adapter board specifically designed to interface the The YL-105 module typically features a standard 2
2.4GHz wireless transceiver module with 5V microcontroller systems, such as the Arduino Uno. YL-105 Datasheet Summary
The YL-105 acts as a voltage regulator and breakout board, solving the common power stability issues associated with the nRF24L01 module. On-board Regulator : Features an AMS1117-3.3
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.
Essay: The Role of the YL-105 in Modern Wireless Prototyping
In the landscape of hobbyist electronics and rapid prototyping, the nRF24L01 transceiver has long been a staple for low-power, short-range wireless communication. However, its popularity is often shadowed by a notorious sensitivity to power supply fluctuations. The YL-105 socket adapter emerged as a pivotal solution to this challenge, bridging the gap between standard 5V microcontrollers and the delicate 3.3V requirements of wireless modules.
The primary utility of the YL-105 lies in its integration of the AMS1117-3.3 linear regulator. While many microcontrollers provide a 3.3V output pin, these outputs often lack the peak current capacity needed during high-speed data transmission, which can draw up to 13.5mA or more in bursts. By allowing a direct 5V connection, the YL-105 ensures that the transceiver has access to a more robust power rail, which the adapter then regulates locally to provide a steady, noise-free 3.3V.
Beyond mere voltage regulation, the YL-105 simplifies the physical architecture of a project. Its 8-pin socket provides a secure mechanical connection for the nRF24L01, while breaking out the SPI (Serial Peripheral Interface) pins into a more accessible format for jumper wires. This reduces the risk of wiring errors and short circuits that are common when using breadboards or loose connections.
Furthermore, the inclusion of bypass capacitors on the YL-105 board addresses the "brown-out" issues that frequently plague nRF24L01 setups. These capacitors act as local energy reservoirs, smoothing out voltage dips during the module's sudden power-hungry transmission cycles. In the absence of such stabilization, communication often fails or becomes inconsistent—a frustration that many developers mitigate by manually soldering capacitors onto the module itself.
In conclusion, the YL-105 is more than a simple adapter; it is an essential stability layer. By providing localized regulation and noise filtration, it allows engineers and students to focus on software and system logic rather than troubleshooting power-related hardware failures. As wireless sensor networks and IoT devices continue to proliferate, modular tools like the YL-105 remain vital for turning complex datasheets into functional, reliable technology. sample code to get your nRF24L01 and YL-105 running with an Arduino?
Arduino and NRF24L01 : 6 Steps (with Pictures) - Instructables
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The YL-105 is commonly known as a voltage regulator breakout board designed specifically for the nRF24L01 2.4GHz wireless transceiver module. This adapter simplifies the power requirements of the radio chip, which is notorious for being sensitive to power fluctuations. Key Specifications
While the adapter itself (YL-105) serves as a power interface, its performance is tied to the AMS1117-3.3 voltage regulator usually found on the board:
Input Voltage: Typically 5V DC (often from an Arduino 5V pin).
Output Voltage: Steady 3.3V DC, which is the required operating voltage for the nRF24L01 chip.
Output Current: Capable of providing up to 800mA, which is more than enough for the transceiver's ~12-15mA peak demand.
Decoupling: Includes onboard capacitors to filter noise, preventing the "radio connection failed" errors common when powering the nRF24L01 directly from microcontroller pins. Pinout and Connection Guide
The YL-105 uses an 8-pin socket for the radio module and provides 10 pins for external connections to your microcontroller (like an Arduino). Adapter Pin Connect to (Arduino Uno Example) VCC 5V Power Input GND CE Chip Enable Digital Pin 7 (Typical) CSN SPI Chip Select Digital Pin 8 (Typical) SCK Digital Pin 13 MOSI SPI Data In Digital Pin 11 MISO SPI Data Out Digital Pin 12 IRQ Interrupt (Optional) Often left unconnected Practical Tips for Use
Voltage Safety: Use the YL-105 adapter to safely power the nRF24L01 from 5V. Connecting the 3.3V nRF24L01 chip directly to 5V will likely destroy it. int hallPin = 2; int ledPin = 13;
Signal Voltage: Even with the YL-105, the data pins (MOSI, MISO, SCK, CE, CSN) are 5V tolerant, meaning you can connect them directly to an Arduino's digital pins without level shifters.
Range Issues: If you are using the PA+LNA (long-range) version of the nRF24L01, this adapter is highly recommended because the extra power amplifier draws more current than standard 3.3V pins can provide. I Can’t get nRF2401 to work - Programming - Arduino Forum