DIY watch bcd

    Once again, kicking students in the direction of a plate on the wall of the classroom with a binary to decimal code, it occurred to me to do something luminous, attracting attention and always with a binary code. For each student in the lesson, the most important thing, after the name of the teacher and the subject of study , is when the break comes. So I decided to make a binary clock and set it in the audience. The session ended, the students ran away, a little free time appeared, and this is what I got. Rear view, entrails, squeaker and button for setting the clock and alarm clock. Inside is an ATmega48 microcontroller, a DS1302 real-time clock with a lithium battery next to it in case of a blackout, a bunch of LEDs connected in a matrix and a lot of joy.

    The test at home and friends showed that 10 minutes after explanations and observations, even a person who is far from mathematics is quite able to make out combinations of lights and understand what time it is. After a couple of days, time begins to be determined mechanically and without mental stress.

    There was a side effect, some guests freeze for a long time following the patterns and losing the thread of the conversation.

    At the request of a friend, he made another copy of the blue color. For those who do not know what such watches show, read the instructions . In a month I will test on my students.

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