Binary Clock

In this lab, you will create the binary clock by continuing to add the seconds, minutes and hours LEDs and then running the clock.py script.

Binary Clock Hardware

Continue pattern started in basic hardware lab.

1. Add LED just above the current LED (F28 for - and F27 for +).
2. Connect short black wire to negative leg (J28) of LED and negative row.
3. Connect long colored wire to positive leg (J27) to GPIO appropriate port according to table below leaving 2 rows between seconds and minutes and another 2 rows between minutes and hours.

Time	GPIO
S1	21
S2	20
S4	16
S8	12
S10	26
S20	19
S40	13
M1	7
M2	8
M4	25
M8	24
M10	6
M20	5
M40	11
H1	23
H2	18
H4	15
H8	14
H10	9
H20	10
H40	22

Binary Clock Code

1. Change directory to the clock code.

   cd binary-clock
   

2. Execute clock code (You can find a copy of this in https://github.com/cjudd/binary-clock).

   ./clock.py
   

3. End script with Ctrl+C.

Auto Start Binary Clock Code

Complete the following if you want the clock to auto start when you plug it into power.

1. Edit rc.local.

   sudo nano /etc/rc.local
   

2. Add following before exit 0.

   /home/pi/binary-clock/clock.py &