How to operate the Olimex Binary-Watch
After a successful assembly insert the CR2032
battery. Upon inserting the battery on a brand
new board you would need to first set the time
and date. Refer to "i. Setting the time and date".
i. Setting the time and date
1. In order to enter the mode for setting date and
time press TIME and DATE buttons
simultaneously. Doing so would light
consequently each of the LEDs starting from
bottom right to top left.
2. The way you set time and date is always in
the same order – TIME: MINUTES -> TIME:
HOURS -> DATE: MONTH -> DATE: DAY.
3. So would have to first enter the current time
starting from the minutes and the lowest bit.
How to do it?
There are only two states of each LED – 1 or 0
– LED lit or LED unlit. You can set the next
state of the currently blinking LED by pressing
down and holding the TIME button, the state of
the LED seen while the button is pressed would
remain after button is depressed (LED either lit
or unlit). If you want the other state just release
the TIME button and press it and hold it again –
the two states change between presses. Once
you have selected the state you want press
DATE button to set it. Now you have to set the
next bit and its LED would be now blinking by
following the same procedure
There are 6 bits for minutes and day of month
(2^5 = 32, 2^4 = 16, 2^3 = 8, 2^2 = 4, 2^1 = 2,
2^0 = 1) and 5 bits for hours and month (2^4 =
16, 2^3 = 8, 2^2 = 4, 2^1 = 2, 2^0 = 1).
For example: If you wish to set time 13 h and 55
minutes and date 2nd of February:
Start by setting the minutes to 55 as following:
1 2 4 8 16 32
1 2 4 0 16 32 =55
1 1 1 0 1 1
Set the hour as following:
1 2 4 8 16
1 0 4 8 0 =13
1 0 1 1 0
Now to the date, first set the month:
1 2 4 8 16
0 2 0 0 0 =2
0 1 0 0 0
Finally set the day of the month:
1 2 4 8 16 32
0 2 0 0 0 0 =2
0 0 0 0 0 0
Voila time and date are now set to 13h and 55
minutes of February the 2nd!
You might need to plan the time ahead until you
get used to the settings, if you make a mistake
just start all over by pressing TIME and DATE
simultaneously.
ii. Checking the time and date (if previously
set) - press either TIME or DATE button.
To check the current time, press and hold TIME
button and calculate the time (sum all values at
top row for hours; sum all values at bottom for
minutes)
To check the month and the day of the month,
press and hold DATE button and calculate the
month and day of month (sum all values at top
row for month; sum all values at bottom for day
of month)
IMPORTANT! Do not press TIME and
DATE buttons at the same time, this would
reset the set time and date and force re-
setting the time and date.