While cost-effective, the YL-105 has distinct limitations that engineers must account for:
The probe connects to the mainboard via a 3-pin interface (usually JST-XH or similar):
The relationship between the sensor output and water quality is non-linear but predictable.
The relationship is inversely proportional: yl105 datasheet
The YL-105 relies on a highly efficient circuit architecture optimized for noise reduction and load regulation: 1. The AMS1117-3.3 LDO Regulator
Using an nRF24L01+ directly connected to an Arduino's onboard 3.3V power pin often results in intermittent packet loss, transmission timeouts, or outright data corruption due to inadequate current spikes during RF broadcasting. The YL-105 acts as a dedicated voltage translation and power filtering hub to achieve reliable 2.4GHz wireless communication. 📋 Technical Specifications Overview Operational Rating 5.0V DC (Highly recommended for stability) Output Voltage Range ( VOUTcap V sub cap O cap U cap T end-sub ) 1.9V to 3.6V DC (Regulated 3.3V typical output) Core Linear Regulator IC Advanced Monolithic Systems AMS1117-3.3 Maximum Output Current Up to 800 mA (Provides massive headroom for PA/LNA modules) Quiescent Current Consumption ~12.3 mA (Internal consumption under nominal load) Compatible Transceiver Footprint Dual-row 8-pin (2x4) standard male/female header Physical Dimensions 26mm x 19mm x 12mm 🛠️ Pinout Configuration & Architectural Design
AMS1117-3.3V (steps down 5V to the 3.3V required by the nRF24L01+). Output Voltage: Stable 3.3V to power the radio module. Operating Current: Typically peaks around 12–15mA during transmission. Connectivity: 2x4 female header for plugging in the nRF24L01+. Input Pins: The YL-105 acts as a dedicated voltage translation
Are you troubleshooting a specific or power delivery issue with your wireless network? Tell me what microcontroller you are pairing it with and how many meters of range your application requires so I can provide customized debugging steps. Share public link
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
| | 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 | 105dB alarm sound
While overwhelmingly associated with Alpha Wire's heat shrink tubing, it is worth noting that the "YL-105" designation appears in other unrelated, niche products. Some search results may point to an "YL-105" as a component in a remote control infrared alarm system, with specifications including a 6V DC power supply, 105dB alarm sound, and a detection range of 3 to 5 meters. Additionally, there are "YL105" sensors, such as the SRWQ100-YL105-9001, a water quality sensor for residual chlorine.
(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.)