This is a very simple DIY clock you can build. Parts are available on eBay.
You will need to have a soldering iron and some solder.
This works on a 5-12 volt power supply.
DIY Clock DS1302-Rotating-LED-Electronic-Digital-Clock-Kit This is an electronic clock. This is a good exercise to built. You will need soldering iron and some solder. Bear in mind you will be soldering very tiny components so you will need a small tipped soldering iron. I got the parts from eBay.
Shame this does have a battery to keep the clock alive.
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