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It is just four step sequencer which i will try to use as TX.
4 frequencies in a sequence switched by rate defined with 555.
Vaweforms; square and can be shaped through band pass or pi network.
I skipped that and did draw only simple transistor because am not sure yet what would be the best approach.
Schematic, up to OP is about be tested, and the rest (transistor) is there just principally.
As mentioned; simple pi network can be used further to shape up vaweform. No need to insist on pure sinus at that level.
But i am afraid, that; vaweform converting will be close dependable on rate speed and frequencies which are about to be choosen.
Not decided yet. Will make it as it is and experiment. Will skip transistor for now.
Achievements? Well, not sure, just am curious to check such thing, nothing else .
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