Make a Talking Clock

Step 2 Materials

I built my clock with a Propeller Platform SD and an LCD UI module.  If you've got those, then the only thing you'll need is a headphone jack to connect the clock to speakers.  Setup is a little different, and I'll show you how to do that later. 

First I'll show you how to build your clock on a breadboard - and here's what you'll need for that;

Code
Here's the sourcecode.  Everything is available under the MIT license.

SD card slot
I mounted mine on a protoboard and cut to size with a dremel.  I'm using a slot from mouser, You can also solder to the pads of one of those microSD - SD adapters.  I've put mine on a protoboard to make it easier to connect.

8x2 Character LCD
Displays the time.  Sparkfun has a 16x2 LCD that will work, too

little speaker
I ripped this out of a little stereo set I had.  You can also use a headphone speaker

3xAA battery box
Mouser Part#12BH331/CS-GR

Parallax Propeller
Available at Parallax

DS1307 RTC
Mouser Part #700-DS1307N

5Mhz Crystal
Available at Parallax

32.768 KHz Crystal
Mouser Part #73-XT262

32kb EEPROM
Mouser Part #579-24LC256-I/P

10k Pot
Available at Parallax

5x Tactile Switches
Mouser Part #653-B3F-1000 

3.3v Voltage Regulator
Mouser Part #511-LD1117V33

Around 10 10k ohm Resistors

4x 4.7k ohm Resistors

3 or 4 .1uF Ceramic Caps

3 47uF Electrolytic Caps

A Prop Plug

If you want to add a battery backup to the RTC, you'll need either a 3v battery, or a super cap and diode

Breadboard and a bunch of hookup wire.

An SD or microSD card. 

Comments

[nikolas10]

hi, thanks for all the information. What component is the super cap and what type of diode did you use? Also what happens when you push the button before it finish the time announce ?