/diy/ - Do It Yourself

Anonymous Wed Aug 22 13:23:02 2018 No.1450031 [View]
File: 24 KB, 750x463, utp-awg24.jpg [View same] [iqdb] [saucenao] [google]

>>1449905
I get my twisted pairs from cheap unshielded network cables (UTP) too, either rigid (AWG24, pic) or flexible (AWG26) which has litz conductors.

What is V_in_high and V_in_low of your receive port? For a typical digital port it isn't 5V and 0V but somewhere in between, like >3V=H and <2V=L. In this case 1V would be the limit for environmental interference. A smaller R on the send port could improve the situation because it is the only load of the capacitive antenna receiving the always haunted environment. Noise immunity is the principal problem of such a simple setup. Did you ground your GND?

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/diy/ - Do It Yourself

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