Orange 500Pcs 50 Resistance Values 1/2W 1% (1.2R-1M) Metal Film Resistors Kit 10K Trimpot Trimmer Potentiometer - (Pack of 5) you would need to daisy-chain

you would need to daisy-chain them in series along the same output channel

it is recommended to use fresh pins rather than reusing removed terminals

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Fine-tune - Adjust sensitivity based on surface reflectivity

Orange 500Pcs 50 Resistance Values 1/2W 1% (1.2R-1M) Metal Film Resistors Kit 10K Trimpot Trimmer Potentiometer - (Pack of 5) you would need to daisy-chainOrange 500Pcs 50 Resistance Values 1 2W 1% (1. 2R 1M) Metal Film Resistors Kit This comprehensive resistor assortment kit contains 500 precision metal film resistors across 50 standard resistance values ranging from 1. 2 ohms to 1 megaohm, each rated at 1 2 watt with 1% tolerance. Professional electronics engineers, hobbyists, and PCB designers rely on this kit to eliminate repeated component sourcing and streamline circuit prototyping and production