I'm building a remote 1kW motorized automatic L-network antenna-tuner for 14MHz, 18MHz, 21MHz, 24MHz, 28MHz and 50MHz. I need to measure the RF input frequency (crudely) in order to recall and preset the motor-driven tuning capacitor and inductor to previously memorized settings based on the actual frequency being sent to the tuner.
The controller is an Arduino mini. I would like to do most of the work inside the mini. Is a 16:1 divider (4bit counter) sufficient to do 54MHz (the max input freq)?
The controller is an Arduino mini. I would like to do most of the work inside the mini. Is a 16:1 divider (4bit counter) sufficient to do 54MHz (the max input freq)?