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#180064
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Re: 3T77 tunnel diodes (again)
Charles, WB3JOK/0
Member Profile
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#180064
How about adding a PNP switching transistor... emitter to +5, base driven from the TTL output, and collector to the trimpot/TD? That way the +5 supply stays negative-ground, and the TD continues to produce positive-going pulses...
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