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Topic: Measure frequency? (Read 3330 times) previous topic - next topic

ON5MF

Hi,

is there a simple way to measure frequencies between 1 MHz and 30 MHz? I'm thinking of modifying my manual antenna tuner to an automatic one.

The resolution doesn't need to be very high, a resolution of 100 or even 500 kHz should be ok.
Current arduino project: universal band decoder for switching antennas and band pass filters

Magician

http://interface.khm.de/index.php/lab/experiments/arduino-frequency-counter-library/
Arduino with 16 MHz clock can't measure above 8 MHz, so you would need divider by 4,

ON5MF

Thanks for the info, will have a look into that.

Of course a devider is not really a problem.
Current arduino project: universal band decoder for switching antennas and band pass filters

MarkT

I have used a SN74LV8154 before to measure frequencies in that range (its a dual 16-bit high
speed counter that can be configured as a single 32-bit counter).  However its output is byte-wide
so a lot of pins are needed to read its output (or a parallel->serial shift register).  Its good to 40MHz
with logic level input.
[ I won't respond to messages, use the forum please ]

Has anyone looked into porting the frequency counter library to the Due?

What would its top end be with its 32 bit timers and 84Mhz clock?

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