Clock

Another interesting project I completed last year was a clock, that uses 5x7 segment displays in a 21x15 configuration to form a display, on which a clock is displayed. The clock also measures temperature, keeps graphs over time and has a scroll text explaining its function. It is controlled by two buttons. On the picture you can see the normal display, with the clock set to approximately 5:30 PM (the LED in the corner indicates the PM). It also shows the current temperature in Celcius as well as the date (13th). The clock uses a PIC16F877A, mostly because of the large number of outputs that is needed to control all the LED. Most time was the soldering of all these connections, I'll include a picture of the back later, which shows how this was done. There are some IC to ensure proper power to the LED (although it is still lacking, occasionally). It uses the DS1307 for the time. The DS1302 with capacitor would've been better, but unfortunately I had none available, so I used the DS1307 with a separate battery.