Crystal Binary Clock

Crystal Binary Clock

Crystal Binary Clock

This is a binary clock I made for my girlfriend’s birthday. It uses 6 jumbo red LEDs which illuminate quartz crystals to display the minutes in binary. Two servo motors are used in the bottom half to display AM/PM and the hour. All of this is controlled with a PIC16F690 microcontroller assembled on a breadboard.

Internals of clock showing circuit, servos, and connections to the LEDs above

The clock does not use any sort of timekeeping chip or even an external crystal for the microcontroller, so it relies on the internal RC oscillator and tends to lose a few minutes each day. There are only two buttons on the clock, an “IM” button (increase minutes) and “DM” (decrease minutes) which allows the time to be set/adjusted as needed.

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Posted on June 6, 2012, in Electronics. Bookmark the permalink. Leave a comment.

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