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Virtuabotix DS1302 Real Time Clock Module Pin-out and coding guide

The DS1302 trickle-charge timekeeping chip contains a real-time clock/calendar and 31 bytes of static RAM.  It communicates with a microprocessor via a simple serial interface.  The real-time clock/calendar provides seconds, minutes, hours, day, date, month, and year information.  Only three wires are required to communicate with the clock/RAM: CE, I/O (data line), and SCLK (serial […]

Versalino LCD & Keypad Design Notes

This board was designed as an interface between an LCD display panel and a 6-pin keypad output.  It only requires a single Versalino Uno or Versalino Nano BUS to operate.  Also, it doesn’t waste any pins on the BUS which is great (because wasting pins is wasteful).  The board came into existence while working on […]