Introduction: ALL-IN-ONE CLOCK

About: Hi there! I like to build stuff :)

For this proyect I used Picaxe microcontrollers.
This clock involves all the types of comunication between MCUs i know to use.
It includes: i2c, infrared, paralel, 1 wire serial, and 2 wire serial (data bit-clock).

Step 1: Where Does the Hour Come From???

To begin I used the DS1307 RTC to provide the hour to all the other MCUs. It is pretty esy to use it if you know how to usw i2c communications.

Step 2: Reading the Hour

A picaxe chip reads it (via i2c), transforms the data to bin and sends it via an infrared link ( I used a small acrillic bar to prove if it is posible to replace optical fiver with acrilic for short distance      transmissions. And as you can see, it is possible!!)

Step 3: Receiving Data

Next, another picaxe receives the infrared data, changes its format to send it to the MAX7219 driver (digit per digit) to do this i thransformed the number to ascii and substracted 48, so I ended up with each digit in a different variable. and then send one by one using 1 serial cable to the Max72 19 driver.

Step 4: MAX7219 Driver

The max7219 driver does a lot of stuff ( in my opinion) it is resumed here: it recieves the four digits and then send bit by bit to the Max7219 which finaly shows the number

Step 5: Conclusions

The amazing thing is that all this process takes less than 2 secs.

I made the digits by myself, I know that they are not the best displays but I really tried to make an effort to make them as pretty as I could

sorry for not uploading the *.bas files, that's because I have them in my programming computer (the one with the DB9 port :) )

thank you for looking at my proyect

If you found any spelling or grammar mistake, I'm sorry I'm from Mexico and I'm still learnig Eanglish

Microcontroller Contest

Participated in the
Microcontroller Contest