Pages: [1]   Go Down
Author Topic: Measure frequency?  (Read 3011 times)
0 Members and 1 Guest are viewing this topic.
Belgium
Offline Offline
Newbie
*
Karma: 0
Posts: 18
ON5MF / OQ6A
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

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.
Logged

Current arduino project: universal band decoder for switching antennas and band pass filters

Montreal
Offline Offline
Faraday Member
**
Karma: 27
Posts: 2556
Per aspera ad astra.
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

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,
Logged

Belgium
Offline Offline
Newbie
*
Karma: 0
Posts: 18
ON5MF / OQ6A
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

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

Of course a devider is not really a problem.
Logged

Current arduino project: universal band decoder for switching antennas and band pass filters

0
Offline Offline
Shannon Member
****
Karma: 199
Posts: 11639
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

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.
Logged

[ I won't respond to messages, use the forum please ]

Iowa
Offline Offline
Newbie
*
Karma: 0
Posts: 8
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

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?
Logged

Pages: [1]   Go Up
Jump to: