Do you want a digital clock which can show day, date including year? The picture below shows Friday in Indonesian that is Jumat. No worries, I have changed the code into Englsh.
The time keeper is DS1302 and backup is 3 pieces 1000uF capacitor. 3 micro switches for mode, increase and decrease. C51 mcu family is used for simplicity and no high computation power is needed.
Below the PCB screenshot, well the mcu package is PLCC44 no different function with DIL40 package. The quality of crystal Q2 is very critical here because it determine the time drift. The connection to P10 LED module detail can be seen at previous post.
You can get the code here.
The apps will create the code in your phone storage in file main.txt.
I made MAX7219 for C51 but now I need it for STM32F103 too. The wiring is simple: MAX7219_CLK hooked up to PORTA0, MAX7219_...
The picture below is a P10 LED module. A module contains 16x32 single color LEDs, could be red, yellow, green, blue, white or purple. The co...
Simply a 0-24 mA signal generator using AT89C2051/4051, PCD8544 monochrome LCD (was used for N5110 phone), DAC7611 (12-bit 1-ch DAC), TL494...