I’ve got another idea for how the blinking can work. It would be user specific, thought it might not be that different between users. A “reader”, a person who wants to read the numbers from the thing, would calibrate the output to how long it takes them to count to 1o. So they would press the start button, then count to 10, and the arduino would time that. When it comes time to read out a number, the arduino would blink rapidly, and the person would count up. so it would be <blinky-blinky>, and the person would be 1.. 2.. 3… then it would stop blinking and the person would know that the number is supposed to be 3.
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