Lucid Technologies CK3-1, Руководство пользователя

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CK3 Alarm Clock and Thermometer
(C) Lucid Technologies 15
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You can make your own unique alarm tones by writing new alarm sound generation
routines. See the subroutines Alarm1 and Alarm2 as examples.
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With the J5 jumper in the UART position the PIC’s UART output is routed to the current-
loop output on J3. The software could be modified to send MIDI commands instead of
generating a local audio alarm. Imagine waking up to music from your synthesizer!
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With the ability to communicate via RS-232 and current-loop, the CK3 can send messages
whenever the software tells it. Remote alarm, time and temperature indicators could be
controlled from the CK3. Remote temperature recording could also be done.
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There are two uncommitted inputs, configured as jumpers connected to shift register U7,
located at the upper right of the circuit board (see Appendix B). These inputs can be used
for any function you can program.
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There are two uncommitted I/O lines, RA0 and RA1, locate just above U1 on the circuit
board (see Appendix B). These connect directly to the PIC and can be used for any function
you can program.
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The software can be modified to dim the display at night. See the DB1 manual and
MC14489 data sheet for details
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The standard software functions as a time-of-day alarm clock, but with the thermometer chip
available it could function as a temperature alarm system. Imagine sounding alarms, or
sending RS-232 messages, when the temperature get too high or too low!
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The DS1305 is a full clock and calendar system. How about special alarms, or messages, on
your birthday or anniversary?
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Does your custom software have data it needs to store that could be lost during a power
outage? The PIC has 256 bytes of EEPROM, and the DS1305 has 96 bytes of user RAM
protected by its super-capacitor power backup.