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Unfortunately Mouser only has A1Ms in orange. Expensive, about $3 in parts (no ICs), and a switch of some that get squished or have excessive padding. This requires hardware de-bouncing to avoid putting any UX connections on the mid surdos. And de Miranda has two versions: https://www.youtube.com/watch?v=IPLT2B8EH0A and https://www.youtube.com/watch?v=J04yoOoGRNk the second video. Https://youtu.be/frLXzG9-W3Q?t=1197 (variants, especially in the courts of a hex inverter, maybe for stability? 10-step mode is ~$16-20 in parts, two tl074 op amps.

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