If you are currently debugging a project with this hardware,
An advanced datasheet would include:
: SPI pin that signals the transceiver when the SPI bus is actively communicating with it.
It’s widely used in:
: This allows you to power your radio module using a standard 5V input (often available from an Arduino or USB source) while outputting a stable, filtered 3.3V specifically for the radio.
The most common mistake beginners make is assuming the datasheet’s logic table is absolute. Most YL-105 datasheets state: "IN = High → Relay OFF; IN = Low → Relay ON." This implies active-low operation. However, the better interpretation involves understanding the onboard NPN transistor (often a S8050) driving the relay coil.
Be aware that "YL-105" can refer to a surprising variety of other industrial products, including: yl105 datasheet better
According to official documentation from L-com, the SRWQ100-YL-105 series delivers professional-grade performance:
: 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.
Here is a detail often missing from standard documentation: The YL-105 does need to be powered 100% of the time. If you are currently debugging a project with
The F2211/2 offers 2:1 shrink ratio with standard flexibility, while the F3003/4 offers 2.5:1 shrink ratio for tighter fits but is semi-rigid. Choose F221 series for general-purpose applications and F3003 when you need maximum strain relief on irregular shapes.
| If you need... | Choose YL105 | Choose DHT22/BME280 | | :--- | :--- | :--- | | Lowest cost for multi-node networks | ✅ | ❌ No | | 3.3V native operation (ESP32) | ✅ Yes | ⚠️ Needs level shifter | | Sub-1-second read intervals | ✅ Yes | ❌ No (2 sec limit) | | Laboratory-grade accuracy (2% RH) | ❌ No | ✅ Yes | | Outdoor weatherproofing | ❌ No | ✅ Yes (with housing) |