Another Digital Clock Circuit, Schematic, and Build Log

pic16f690 mcp23s17 ds1305 block diagram of clockI couldn’t take it any longer. I haven’t played in a long time so I decided to start from scratch and design another digital clock. I’m working on the board right now. I had one more display, RTC, and 32.768KHz xtal ¬†left.

I am building my own display driver this time though. The display driver will be an MCP23S17 multiplexer and a PIC16F690 microcontroller. The display driver that I used in the Picaxe clock was about $8. Not counting the amount of time I’ve spent writing the code my display driver should be about $2. Plus, I really don’t want to have to buy a driver and then spend the money on shipping when I have what it takes to make something work. We’ll see how it goes. In theory it seems like it will work.

I’ll explain more in a few weeks. I’m also tackling this project to create a C header file for the DS1305. It might help someone else out who is trying to work with it.

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About robbie

I am an electronics enthusiest and a ham radio operator (W1RCP). I like to play with electronics. It's fun and educational. I looked forward to working in the engineering field in the future. I have a BS in Electronics Engineering Technology from DeVry University. I also have an Associate's degree in Marketing Management from Moultrie Tech, and a diploma in Electronics from MTC.

One thought on “Another Digital Clock Circuit, Schematic, and Build Log

  1. If you are looking for info for this project, I sincerely apologize. My college studies have become too intense to devote the time to this project.