4 Pin PWM Fan Controller with Temperature Sensor, 5V 12V PC Fan Temperature Controller, 10cm Probe

Ultra-compact 4-wire PWM fan temperature controller for 5V or 12V systems with 10cm temperature probe Key benefits - Precise temperature-based fan speed control to reduce noise and maintain adequate cooling. - Very small footprint for easy integration into tight enclosures, cabinets, or compact PC builds. - Simple compatibility with standard 4-wire PWM fans for reliable, PWM-based speed control. What it does and why you need it - Automatically adjusts 4-wire PWM fan speed based on temperature, lowering fan RPM at idle or low temperature to reduce noise and increasing speed as temperature rises to protect components. - Offers precise PWM control at 25 kHz and a 3.3V PWM signal amplitude for stable, responsive fan behavior. - Compact size and low self-consumption make it suitable for small electronics projects and constrained spaces. Key features - Operating voltage: DC 5V or 12V (board operating range DC 4.5 to 16V). - Designed for standard 4-wire PWM fans only; PWM controls fan speed and actual RPM response depends on fan design. - Maximum current through board connector: 3A. Higher-current fans can be powered via an external power cable while using the board for PWM control. - Board quiescent current: less than 20 mA. - PWM frequency: 25 kHz, Vpp = 3.3V. - Temperature probe model: 50K B = 3950, probe length 10 cm. - Probe maximum temperature: small bead probe 120 C, ring probe 110 C. - Board operating temperature: -10 C to 60 C. - Board dimensions: 29 mm x 13 mm x 9 mm (board body, excluding interface). Fan connector adds 7 mm and can be sleeved with 12 mm heat shrink tubing. Compatibility and limitations - Compatible only with standard 4-wire PWM fans at 5V or 12V. The controller cannot control 2-wire or 3-wire fans. - The controller does not cut fan power and cannot switch the fan completely off. - The controller does not provide fan speed measurement; it does not output a tachometer signal for RPM monitoring. - Ensure supply voltage matches the fan voltage before use. Signal mode options - Forward mode: for standard fans. PWM increases produce higher output; full output corresponds to 100. - Reverse mode: for reverse-timing fans. PWM logic is inverted; full output corresponds to 0. - Reverse 80 percent mode: for certain reverse-timing fans. PWM logic is inverted and full output corresponds to 20. Factory default settings - Base speed output Po = 20 percent. - Trigger temperature Tu = 30 C. - Temperature control interval Td = 5 C (full speed at 35 C). - Default signal mode: forward. Practical applications - Computer chassis and small server cabinets: maintain quiet operation at low load and increase cooling when temperatures rise. - Network attached storage, home servers, and small electronics enclosures: compact controller fits into tight spaces while providing temperature-based fan control. - DIY and embedded projects: integrate into custom cooling solutions for single-board computer clusters, 3D printers, or compact control cabinets using 4-wire