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/******************************************************************************
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For a schematic, see propeller-clock.sch.
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- a PC fan is wired up to the 12V supply.
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- the fan's SENSE (tachiometer) pin is connected to pin 2 on the
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- the pins 4 to 13 on the arduino should directly drive an LED (the
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LED on pin 4 is in the centre of the clock face and the LED on pin
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- if a longer hand (and a larger clock face) is desired, pin 4 can
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be used to indirectly drive (via a MOSFET) multiple LEDs which
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turn on and off in unison in the centre of the clock.
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- a button should be attached to pin 3 that grounds it when pressed.
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Implementation details:
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- the timing of the drawing of the clock face is recalculated with
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every rotation of the propeller (for maximum update speed).
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- pressing the button cycles between display modes
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- holding down the button for 2 seconds enters "set time" mode. In
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this mode, the fan must be held still and the LEDs will indicate
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what number is being entered for each time digit. Pressing the
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button increments the current digit. Holding it down moves to the
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next digit (or leaves "set time" mode when there are no more). In
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order, the digits (with accepted values) are: hours-tens (0 to 2),
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hours-ones (0 to 9), minutes-tens (0 to 5), minutes-ones (0 to 9).
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* a PC fan is wired up to a 12V power supply
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* the fan's SENSE (tachiometer) pin connected to pin 2 on the
33
* the pins 4 to 13 on the arduino should directly drive an LED (the
34
LED on pin 4 is in the centre of the clock face and the LED on pin
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* if a longer hand (and a larger clock face) is desired, pin 4 can be
38
used to indirectly drive a transistor which in turn drives several
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LEDs that turn on anf off in unison in the centre of the clock.
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* a button should be attached to pin 3 that grounds it when pressed.
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* A DS1307 remote clock is connected via I2C on analog pins 4 and 5.
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Implementation details:
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* for a schematic, see ../project/propeller-clock.sch.
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* the timing of the drawing of the clock face is recalculated with
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every rotation of the propeller.
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* a PC fan actually sends 2 tachiometer pulses per revolution, so the
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software skips every other one. This means that the clock may
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appear upside-down if started with the propeller in the wrong
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position. You will need to experiment to dicsover the position that
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the propeller must be in when starting the clock.
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* pressing the button cycles between variations of the current
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* pressing and holding the button for a second cycles between display
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modes (e.g., analogue and digital).
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* pressing and holding the button for 5 seconds enters "time set"
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mode. In this mode, the following applies:
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- the field that is being set flashes
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- pressing the button increments the field currently being set
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- pressing and holding the button for a second cycles through the
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fields that can be set
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- pressing and holding the button for 5 seconds sets the time and
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******************************************************************************/
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#include <Bounce.h>
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//_____________________________________________________________________________
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// what needs to be drawn?
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bool draw_tick = second % 5 == 0;
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bool draw_second = second == time_seconds;
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bool draw_minute = second == time_minute;
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bool draw_hour = second == time_hour;
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bool draw_tick = !segment && second % 5 == 0;
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bool draw_second = !segment && second == time_seconds;
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bool draw_minute = !segment && second == time_minutes;
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bool draw_hour = !segment && second == time_hours;
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digitalWrite( 13, HIGH );
added
removed
src/propeller-clock.ino
