Clock with LCD and PIC 18F4620 v. 3.0.1

News summary

Adding the module FTDI (conversion from RS232 to USB) through a special program that interfaces with a computer.
Through this interface it is possible to synchronize the clock with your computer's clock with the utmost speed and accuracy. The computer clock is synchronized with atomic clocks scattered on our planet such as time.windows.com
You can also receive alarms on the PC, edit them and return them updated to the clock and at the end ... you can manage holidays and birthdays from the program on your computer and transfer it in just a few minutes into the eeprom clock no longer use the small buttons letter by letter.
* Who has implemented the USB module can also make use of the management of automatic brightness and positioning the cursor in the menu PL1

As we have received requests from users who have difficulty in finding some components and others who are unable to program the micro, we are setting up a complete kit with all components including the latest version of PCB (printed circuit board) this in keeping with the spirit of this website that aims to promote knowledge of electronics.

For the kit, press the button to the left

Summary characteristics of previous versions

• 24h time clock with LCD 4 lines x 20 characters.

• Line 1: day, month, and year, Line 2: day of the week (eg Mon for Monday), hours, minutes and seconds, Line 3: if any party or birthday and setup menus are displayed as a description of the various alarm mode. Line 4: the three alarm clocks with setting method or written "Snooze" with the display of the remaining time.

• Excellent precision, temperature compensated oscillator guaranteed DS32KHZ.

• Supported languages​​: Italian, English and German editable via button

• 3 independent alarms can be set: Once, Always, Week Mon-Fri, Week Mon-Sat with independent digital outputs for each clock alar, or only one digital output common to all alarm or buzzer.

• 10-minute snooze mode infinitely repeatable.

• Update daylight savings time / winter time settings automatically

• Storage and display up to 255 holidays and / or birthdays up to 3 events per day.

• Backlight brightness freely adjustable in 10 steps.

• 3V lithium battery backup for clock / calendar DS1306

• 9V battery backup for the system clock in the absence of the mains voltage, without backlight lcd and 1Hz led flashing at rate of 5 seconds.

• Timeout management buttons (see specifications)

Wiring diagram version 3.00 (02/01/2013)

Attention: The strip containing the signals have not been drawn on this electric for reasons of space

Instead FTDI adapter you can use an adapter PL2303 series without modification

Prototype version 3.00 (02/01/2013)

Prototype case (Doct. Bucciarelli Daniele)

Prototype case (Doct. Bucciarelli Daniele)

Prototype case (Doct. Bucciarelli Daniele)

Screenshot software - 1

Screenshot software - 2

Screenshot software - 3

Screenshot software MPLAB (Assembler for PIC 18)

Screenshot software Visual Studio 2008

"S" command via USB used for sending alarms

Receiving alarms (Command S and response of micro)

Time between CE and sending the clock SPI interface

Clock time of 1 byte

DS1306 SPI interface 1=CE, 2=Clock, 3=DO, 4=SDI

DS1306 SPI interface 1=CE, 2=Clock, 3=DO, 4=SDI

P1 Bridge output

7809 VCC output

7809 Output ripple

Zener voltage with mains power