This is PART 4a (there is a part 4b below) of the project “Arduino Frequency Display For a Kenwood TS-520S HF Ham Radio”. This part covers switching to a new front end circuit as seen used by the DFD2 frequency counter from “Almost All Digital Electronics”. Their website is http://aade.com/DFD2inst/DFD2inst.htm
This is PART 4b of the project “Arduino Frequency Display For a Kenwood TS-520S HF Ham Radio”. This part covers testing the circuit and frequency counter software when connected to the Kenwood radio but still on a bread board. The final display is not ready so in this video I simply push the frequence counts to the laptop.
Here is the datasheet for the PLL chip I used in (PART 4). Other datasheets can be found in (PART 1).
74HC4046 Phase-Locked Loop with VCO (PDF)
OttLite LED 2-in-1 Magnifier Floor and Table Lamp Review
I liked it quite a lot. I will report back here if my option changes for any reason.
CLICK PHOTO for gallery view and click a SECOND time for hi-resolution image. Click thumbnails on lower right and lower left of gallery to navigate gallery photos.
This is PART 3 of the project “Arduino Frequency Display For a Kenwood TS-520S HF Ham Radio”. This part covers 0.9 volt 38 MHz signal amplified into Schmitt triggered NAND gate for cleanup before going to a divide by 8 ripple counter chip then finally being cleanly counted by the Arduino using multiply by 8 math function to restore counts to 38 MHz. All parts: (PART 4), (PART 3), (PART 2), (PART 1)
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