CPC122040SC-R ebm-papst | ebm-papst Fan Speed Controller, Variable, 12 V dc, 1μA, Pulse Width Modulation | 667-0377 | RS Components
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PWM 4-Wire Fan Temperature Controller Speed Governor For PC Fan/Alarm DC 5V-12V | eBay
4-Wire fans
4 Wire PC Fan
CPCXXVV10UN-R ebm-papst | ebm-papst A2P Interface Series Fan Speed Controller, Variable, 10 → 57 V dc, Pulse Width Modulation | 165-1401 | RS Components
HW-585 PC CPU Fan Speed Controller
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12V 4-pin PC fan controller (AVR) - equivariant
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Using Raspberry Pi to Control a PWM Fan and Monitor its Speed - DriftKingTW's Blog
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Using Raspberry Pi to Control a PWM Fan and Monitor its Speed - DriftKingTW's Blog
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9PC8666X-S001 | Sanyo Denki Fan Speed Controller, 5 Speeds, 7 → 60 V dc, Pulse Width Modulation | RS Components
Computer Fan Speed Modifier (in Under 30 Minutes) : 4 Steps (with Pictures) - Instructables
4-Wire Pulse Width Modulation (PWM) Controlled Fans Specification
Using Raspberry Pi to Control a PWM Fan and Monitor its Speed - DriftKingTW's Blog
