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Fevas TCS230 Color Recognition Sensor (Static Recognition) Output Frequency Signal: Amazon.com: Industrial & Scientific
HiLetgo Si5351 Si5351A I2C IIC High Frequency Signal Generator Square Wave Frequency Generator 3.3-5V 8KHz -160MHz for Arduino: Amazon.com: Industrial & Scientific
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Frequency Converter AD831 Single Chip High Frequency RF Mixer Radio Frequency Conversion Module for HF and VHF Receiver, 0.1-500MHz: Amazon.com: Industrial & Scientific
Frequency Converter AD831 Single Chip High Frequency RF Mixer Radio Frequency Conversion Module for HF and VHF Receiver, 0.1-500MHz: Amazon.com: Industrial & Scientific
Amazon.com: DEVMO 5PCS NE555 Pulse Module Frequency Duty Cycle Adjustable Square Signal Generator : Industrial & Scientific
