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schema termostat

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M-am hotarat asupra schemei care o voi construi atat ca voi pune releu in loc de triac

http://homemadecircuitsandschematics.bl ... ostat.html

As vrea sa stiu cum fac sa imi cupleze iar compresorul cand ajunge la -19 grade C.Din semireglabilul din schema setez ca sa imi decupeze cand ajunge la -23 si nu as vrea sa imi cupleze compresorul de fiecare data canf creste temperatura cu un grad.

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" The feedback resistor R5 to some extent helps to induce hysteresis into the circuit, an important parameter without which the circuit may keep flip-flopping quite rapidly in response to the sudden temperature changes. "Pune un semireglabil in locul lui R5 , de valoare apropiata si inseriat cu o rezistenta de 20-25 % din valoarea initiala a lui R5 . Acum poti experimenta ce doresti ... ai un histerezis reglabil ... Ideea e sa ai reglabil acest grup in anumite limite ... valorile poate necesita sa fie tatonate ! Eventual modifica schema , o poti transforma intr-un comparator cu fereastra ...

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