Frequency counter - little progress


There is little progress on my own frequency counter evolution board during xmas holiday.

  • changed 18.432Mhz main crystal for CPU clock to more accurate 32Mhz crystal oscillator divided via one half of 74ALS74 to 16Mhz
  • wrote short code to control LCD HD44780 and show digits on 2 lines via custom characters
  • wired 2nd half 74ALS74 for input prescaler, theoretical maximal meassured frequency is 12.8Mhz

This LCD version I made for Josef OK2VTD, he wanted use it in 80M TRX. Unfortunatelly, no reply from him to our email, Josef passed away close before Xmas.