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Inventor Creates Affordable Paint Mixing System Spectrum

3/27/2026

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Summary

Story summary

James Provost developed Spectrum, a paint mixing system that enables hundreds of spray-paint colors.
The system uses four base colors controlled by an Arduino Nano and a push button for paint flow.
He solved backflow by using sequential paint pulses.
The final design includes a high-speed rotary pinch valve that can open for 30 milliseconds, with materials under $150.
Provost plans to share step-by-step instructions for making a Spectrum sprayer.

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Story summary

James Provost developed Spectrum, a paint mixing system that enables hundreds of spray-paint colors.
The system uses four base colors controlled by an Arduino Nano and a push button for paint flow.
He solved backflow by using sequential paint pulses.
The final design includes a high-speed rotary pinch valve that can open for 30 milliseconds, with materials under $150.
Provost plans to share step-by-step instructions for making a Spectrum sprayer.