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Simplest Arduino “talking” clock suitable for people with weak or damaged eyesight.

This is another of my collection of unusual clocks. The working principle is the following:

When we move our hand in front of sensor, the clock tells the exact time at that moment with a synthesized “robotic” voice.

The device is very simple and consists of an Arduino microcontroller, a DS3231 real-time clock module and small D-class power amplifier module with speaker. The code uses “Talkie” library (a software implementation of the Texas Instruments speech synthesis architecture from the late 1970s / early 1980s, as used on several popular applications). I got the code from :, and I modified it so that instead of a button, the watch is activated by hand gesture. Note that the code should be compiled with an older version of Arduino IDE, in this case 1.0.6.

This device is very useful for people with poor or impaired vision.”

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