[WriteLog] MMTTY + WL, My transmission ir reversed

[Peter]

Timo

Just reverse the INPUT (anode/catode) on the optocoupler. Thats it



Timo Pohjola wrote:

> Does anybody know what is the reason for reversed transmission?
>
> The principle of my FSK keying interface is the same as for example
> http://www.va3cr.net/pdf/optointerface%20by%20N2UZ.pdf
>

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