When your box no longer displays the time, you recycle an old tnt receiver.
Clock based on a Digital Terrestrial Receiver (TNT) module,
Brand: SilverCrest
Model: "SL 65 T" sold by Lidl
The front panel is composed of:
- 4 digits 7 segments plus a point (LIM-5622G + 74HC164).
- 7 push buttons
- 1 IR receiver (not used)
(+)
5V o---------------------+--+--+--+
| | | |
/DG4 | | | |/
#9 o-----------------------------|\ QD4
| | | |
| | | |
/DG3 | | |/ |
#8 o--------------------------|\ | QD3
| | | |
| | | |
/DG2 | |/ | |
#7 o-----------------------|\ | | QD2
| | | |
| | | |
/DG1 |/ | | |
#6 o--------------------|\ | | | QD1
| | | |
+--+--+--+--+--+
| Digit1,2,3,4 |
+---++++++++---+
||||||||
DSA +-++++++++-+
#4 o------------------->+ 74HC164 |
+-+--------+
CP |
#5 o----------------------+
/HRM /HRP /MNM /MNP
#10 o-----+ #11 o-----+ #12 o-----+ #13 o-----+
| | | |
[-\ [-\ [-\ [-\
| | | |
GND o-----+------------+------------+------------+
This project has been developped on an Arduino Leonardo but it can run on many other boards.
You needs to install the "DS3231" library.