laser – Dr. Jian Chen https://www.jianchen.info 陈建博士 Wed, 29 Jun 2022 00:05:49 +0000 en-US hourly 1 https://wordpress.org/?v=6.1.1 https://www.jianchen.info/wp-content/uploads/2022/06/cropped-Frued_Cartoon-32x32.png laser – Dr. Jian Chen https://www.jianchen.info 32 32 Keyboard Calibration Using the Damn Laser https://www.jianchen.info/2017/03/09/keyboard-calibration-using-the-damn-laser/ Thu, 09 Mar 2017 00:04:34 +0000 https://www.jianchen.info/?p=115 Read more]]> Almost no one care about how precise/reliable the keyboard pressing is, here, we built a damn cool equipment to examine this question. Broadly speaking, the time precision is good, mean variance is less than 0.2 ms.

Environment: MATLAB with Linux (Ubuntu 14.04)

Monitor: SONY Triniton at 120Hz

Keyboard: Mechanic number board

In short, the delay is about 12 ms and the variation is quite small.

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