HH pulse regime problem

[ivan.stevanovic]

Hi Carl,



I finish your HH option 2 rev C1 but I have some problems. When I test HH in my room HH work perfect and I can easy find pulse regime and I can detect 1 euro in 18cm distance. When I go out of my room and test HH I cant find pulse regime. I have just silent or constant ton (when I have silent I can detect 1 euro in same distance and HH work perfect too but I cant find pulse regime ).Can you tell me what that happening?



THANKS.



P.S My R30=150k too.

[ivan.stevanovic]

P.S My R30=39k not 150k

[Carl-NC]

I wonder if there is something indoors that is causing a large threshold shift, such that the 39k resistor makes it work. Doesn't make sense, because such a large shift should also kill sensitivity. Try the 150k and see if it works outside. If it's easier to do, you can instead reduce R32 by tacking a 47k resistor in parallel with the 100k.

- Carl