Custom PWM reference controller? | Electronics Forum (Circuits, Projects and Microcontrollers)
Using Raspberry Pi to Control a PWM Fan and Monitor its Speed - DriftKingTW's Blog
Using Raspberry Pi to Control a PWM Fan and Monitor its Speed - DriftKingTW's Blog
4 Wire PC Fan
Planet Analog - How to implement PWM fan driver using configurable chips
4-Wire fans
Dc 12v 5a Pwm Pc Fan Temperature Manumotive Speed Controller Module Cpu High-temp Alarm With Buzz Probe For Arduino Heat Sink - Instrument Parts & Accessories - AliExpress
HW-585 PC CPU Fan Speed Controller
9PC8666X-S001 | Sanyo Denki Fan Speed Controller, 5 Speeds, 7 → 60 V dc, Pulse Width Modulation | RS Components
PWM Heatsink/Chip Cooling Fan - Codrey Electronics
Planet Analog - How to implement PWM fan driver using configurable chips