The clock started out as a Christmas project for a Pi Zero I had just received. Having got a lot attention from my original blog post, I decided to work it up to launch as a Kickstarter, essentially to fund a production run of PCB boards. While working the PCB layout for the TF I realised it would be quite easy to incorporate the option to run the clock from an Arduino Nano. So spent a bit of time breadboarding it to check there were no problems with the Arduino RTC and display driver libraries, then added a Arduino Nano as an alternative processor option onto the PCB layout.
Finally in the spirit of flexibility I added extra drilling’s so you can, with relative ease also mount a Raspberry Pi A / B onto the back of the TF board and then wire them it in using individual jumpers. The only Pi’s I haven’t catered for are the very early revisions without any fixing points. These will still drive the board but you will have to figure out your own mounting arrangements.
If you want to go the complete DIY route you can find details of the original breadboard version including schematic and simple functional version of the s/w here. Note: – In working up the design for the Kickstarter I had to make a number of changes to accommodate the Arduino and early Pi boards, as result the software for the DIY version is not fully compatible with the Tempus Fugit PCB and visa versa.