Measure RPM - Optical Tachometer : 10 Steps (with Pictures) - Instructables
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VAG Tacho V 5.0 for Nec MCU 24c32 or 24c64 - China Vag Tacho V5.0 Vag Tacho 5.0, Vag K+Can Commander V3.6 | Made-in-China.com
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VAG Tacho USB Version V5.0 For NEC MCU 24C32 or 24C64 VAG Immo Box Eep – VXDAS Official Store
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PC 12V 3 pin fan slows down when trying to connect tacho signal | Electronics Forum (Circuits, Projects and Microcontrollers)
VAG Tacho 5.0 USB Version Quality Stable For VDO NEC MCU 24C32 or 24C64 TACHO Immo Box Eeprom Programmer V5.0 Diagnostic Cable - AliExpress
VAG Tacho USB Version V5.0 For NEC MCU 24C32 or 24C64 VAG Immo Box Eep – VXDAS Official Store
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DAOKI 5Pcs Speed Measuring Sensor LM393 Speed Measuring Module Tacho Sensor Slot Type IR Optocoupler for MCU RPI Arduino DIY Kit with Encoders: Amazon.com: Industrial & Scientific
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MCU / PCB Cooling Duet 3 | Duet3D Forum
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opto isolator - Reading ECU tacho signal with PIC MCU - noise issues - Electrical Engineering Stack Exchange
DIY Arduino Tachometer using IR Sensor
Overview | EMC2101 Fan Controller and Temperature sensor | Adafruit Learning System
