Ethernet-Enabled PWM Fan Controller
Overview Server racks typically rely on manual fan control or basic thermal curves with no remote visibility. This board brings network-enabled control to standard PWM fans — allowing fan speed to be monitored and adjusted remotely, and enabling automation rules that reduce power consumption during off-peak hours. Date March 2026 My role Hardware Design MCU ESP32-ETH PCB 2-Layer, KiCad GitHub hardware-portfolio/EthernetFanController Features PWM Fan Control — Precise speed control via PWM output for standard 4-pin fans Wired Ethernet — Based on the ESP32-ETH for reliable wired network integration, suitable for rack environments where WiFi is unreliable or disallowed Remote Control — Fan speed adjustable over the network Power Saving Automation — Supports scheduled or sensor-triggered fan speed profiles to reduce energy consumption during off-peak hours Hardware Highlights ESP32-ETH chosen as the compute core — onboard Ethernet MAC and proven reliability in industrial and networking applications, avoids the unreliability of WiFi in dense rack environments Designed specifically for server rack form factor and operating conditions PWM output stage sized for standard 4-pin PWM fans with proper current handling Layout optimised for EMI — switching PWM signals kept away from the Ethernet magnetics Images ...