LPC810 as DCF77 decoder (and I2C slave)

<p>After making the LPC810 reading IR remote controls (www.elektor-labs.com/project/lpc810-as-ir-decoder.14053.html) I thought of another idea to use the little 8-pin device for. And that became the DCF77 decoder presented here. Like decoding IR remote controls, decoding the Frankfurt time signal takes only one GPIO input - to connect to a DCF receiver board (Conrad# 641138).</p>