/diy/ - Do It Yourself

Anonymous Sun May 27 23:49:11 2018 No.1395234 [View]
File: 6 KB, 517x188, frequency counter.gif [View same] [iqdb] [saucenao] [google]

>>1395188

forget the arduino. get a software scope program like Winscope. to protect your sound card, divide the signal so it's lower than 0.5V and use back-to-back diodes to limit voltage input to the AUX jack to 0.7V. (use a cheap external USB sound card if still worried.)
https://windowsreport.com/oscilloscope-software-pc-laptop/

if the signal is clean, you can use a software frequency counter instead.

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/diy/ - Do It Yourself

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