DL4YHF's Frequency Counter

Here is a picture of DL4YHF Frequency Counter that I had been building last week. The picture is taken in the middle of building so some of the components might be missing. The unit powers up fine but I have a little problem with the LED display. When displaying '0' the segment 'F' does not light up. The whole display (including the segment F) lights up when the unit does a 'Lamp Test' at init. I have looked over the display wiring several times but had no luck. I even changed couple of displays but get the same result. Due to lack of time, I haven't been able to do further testing.

Wolf, the author has been very helpful on debugging the segment issue. He even rolled out an updated code to support common anode displays on my request.
Posted by Hello