I am sure this is a case of "I don't know what it's called so I can't search for it"... There must be a method/chip/something that will allow me to do this. I want to measure the frequency (radio transmitter) (I can attach to the coax) and act upon the measured frequency. This is in the 10 meter - …

I have a cheap multimeter that can measure frequency. IIRC it works fine up to 4MHz (the max I tried). Perhaps a better model would cover the range you need. My multimeter also has some sort of RS232 output that I have never used. ...R

You can buy a frequency counter (meter) or build one, accurate to 1 Hz or better, depending on the accuracy of your time base. DIY kit example. Also possible with Arduino.

jremington: You can buy a frequency counter (meter) or build one, accurate to 1 Hz or better, depending on the accuracy of your time base. DIY kit example. Also possible with Arduino. Can't argue with that. It even comes with a PCB!

It is interesting that the design for the inexpensive Chinese-produced kit was obviously taken directly from here: Frequency counter with PIC and 4- to 5-digit LED display . The above link describes several options, such as including a frequency offset, and also gives the PIC source code. The autho…

You can read really high with a uC 100 mhz is easy to read. I've seen some really cool homemade ones.

Sorry; I left an important bit out. I want to read said frequency with an arduino. Sure I can use a scope or purpose build frequency counter, but I want to be able to read the frequency in an arduino & act upon reading it. I know (believe?) the arduino cannot read frequencies that high directly, so…

You need a frequency divider which can bring the frequency down to a rate that the Arduino can read. That is what the 'prescaler' in the PIC chip is doing. It is really just a simple counter that counts up to 16 or 32 or whatever. The output is just the last digit in the count. A PLL can be used to…

Nick Gammon had a Freq Counter example in Timers and counters // Timer and Counter example // Author: Nick Gammon // Date: 17th January 2012 // Input: Pin D5 // these are checked for in the main program volatile unsigned long timerCounts; volatile boolean counterReady; // internal to counting ro…

Hi, A quick google arduino mhz frequency counter [image] GitHub - abdallah-ali-abdallah/Arduino-Frequency-Counter-with-LCD: Arduino... Arduino Frequency Counter with LCD with maximum frequency input 64 Mhz - GitHub - abdallah-ali-abdallah/Arduino-Frequency-Counter-with-LCD: Arduino Fre…

Measuring frequency fairly accurately in the megahertz range

Projects General Guidance

KeithRB August 26, 2016, 6:11pm 2

You left out the important thing. Budget. If money is not object a spectrum analyzer would be best. Other wise a frequency counter.

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Measuring frequency fairly accurately in the megahertz range

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