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by raphlinus
3101 days ago
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My parts list is here: http://a.co/fltiKey , and the light sensor is one of those Chinese MH-Sensor-Series Flying Fish with a photodiode. The difference between space and '#' at a normal terminal/editor font is around 20 counts (out of 1024 total), which is plenty enough to detect reliably, and the response time is easily <1ms, as cross-checked by the 1000fps camera. |
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