ARDUINO OLED TALKING ALARM-CLOCK

The clock uses ATMEGA328 internal timers to get 1 second time base which is as accurate as the 16MHz crystal. The code works for Arduino Nano and Uno only. 
The DF Player plays many sound formats. The talking clock can be used in other languages. In languages that numbers are read in different order, like Arabic, section of the code has to be changed and number of tracks changed too. MP3 files in English can be downloaded from the PIC project below. Track 28 (alarm sound) can be replaced by a song you like.
MODE button is for setting time and volume. M_C sets the clock, M-A setst alarm time, M-O sets alarm ON/OFF and M-V sets volume.
When power comes on after power cut TALK button has to be presset to start the clock.
The clock reads the tracks from the SD card in the order they are placed in the root directory, not by name of track, the tracks have to be copied one at a time.
Display is OLED 0.96", SSD1306, I2C.
DF Player is a mini MP3 player from Ebay.
Format the card with FAT32. No folders or subfolders.
Copy to the root folder the files, one at a time and in this order; 0 to 19 (20 files),20,30,40,50,"hours","minutes","good day" (or any other message), alarm. Totally 28 files. If you make a mistake while copying the files to the SD it isn't good enough to delete a file, you must start again with formatting the SD. The reason for loading the files one at a time is that if you load them together the PC sends them to the card in the order it finds fit, and when the code plays them it picks up the files without searching for their name. The software includes wave files in English.

ARDUINO LCD AND SD CARD TALKING CLOCK

PIC16F628A OLED TALKING CLOCK

The pic drives the OLED using software I2C (bit banging). Time base is set by dividing 32768Hz crystal using CCP1and TMR1. OLED module is 0.96", I2C, SSD1306 driver, 128x64.
Pressing TALK requests relevant tracks of hours and minutes to be played. Tracks can be changed to any language, wav or mp3, you can also record your own voice.
The SD card in the player must be formatted to FAT32. The player reads the tracks in the order they are written (not by the names), as an example track 53msg.mp3 is read by the dfplayer . Tracks files must be copied to the SD one track at a time and in the order they are in the computer folder. No other files or folders should be on the card. If you wish to change any of the tracks you need to reformate the SD first and then copy the new files.
Datasheet for the DFPlayer:  http://www.picaxe.com/docs/spe033.pdf

PIC16F876A DFPlayer TALKING CLOCK

The pic drives the LCD to display hours and minutes. Time base is set by dividing 4MHz using CCP1, CCP2, TMR1, TMR2.
Pressing TALK requests relevant tracks of hours and minutes to be played. Tracks can be changed to any language, wav or mp3, you can also record your own voice. 
The SD card in the player must be formatted to FAT32. The player reads the tracks in the order they are written (not by the names), as an example track 53msg.mp3 is read by the dfplayer . Tracks files must be copied to the SD one track at a time and in the order they are in the computer folder. No other files or folders should be on the card. If you wish to change any of the tracks you need to reformate the SD first and then copy the new files.
Datasheet for the DFPlayer:  http://www.picaxe.com/docs/spe033.pdf
The LCD module is HD44780 compatible, most modules on sale are. It can be 1 or 2 lines. 

You are free to use the circuit diagram and software with no limitations.

ANDROID TALKING CLOCK

The clock uses Text To Speech built in Android device, for reading the time. It reads time hourly at the background. The app is made in B4A (basic for Android). App for Android can be downloaded from GitHub. Included code for the app, if you wish to change it download free IDE from:   https://www.b4x.com/
To install the app on Android device place the APK file in the device, when you open the file it ask if you want it installed.
Leave the clock running in your office so at least once every hour you get to hear something that makes sense.

  

Circuit Description
See also Technical Tips

LCD supply is 5V. The SD Card supply is only 3.3V (3-3.6V) The 3.3V and 5V are generated on the Arduino board.
The PWM output is boosted by 2 transistors push-pull. The signal to the speaker is PWM of 62 KHz and the speaker outputs the modulated audio only. The speaker should be 8 ohms or higher.
Digital outputs from the Arduino to the SD card use 1K and 2K resistors to reduce the 5V signals to 3.3V. SD output at pin 7 is 3.3V but is enough to drive the input.
The pins number are for ordinary SD card, for MicroSD the pins are different.
Link between Arduino pins 3 and 5 connect 1000 Hz clock from timer 2 to timer 1, these timers generate 1 minute time base.
LCD display and driver has 14 way connector, 10 connections are used, 4 bits data bus is selected. 10K pot adjusts the contrast. Use 16 x 2 LCD module.

Circuit Description
See also Technical Tips

DFPlayer mini module is sold as MP3 player for Arduino. https://www.ebay.co.uk
1K /470R resistor is to reduce the 5V output of the PIC to 3.3V input of the DFPlayer.
Pic16f876a volume can be controlled by pushbuttons connected to pins 9, 11 of the DFPlayer, see the datasheet.
LCD display is 1 or 2 lines 16 characters module.
Pic16f876a link between pins 11 and 12 connects output of CCP2 to the input of TIMER1.
Connecting 10-100 ohm resistor in series to the speaker reduces the current from the 5V supply.

Circuit Description
See also Technical Tips

DFPlayer mini module is sold as MP3 player for Arduino. https://www.ebay.co.uk
1K resistor is to reduce the 5V output of the Arduino to 3.3V input of the DFPlayer.
OLED display is SSD1306 can be bought from Ebay.
Connecting 10-100 ohm resistor in series to the speaker reduces the current from the 5V supply.