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rzone

Un sfat...se pot lega 2 termistori in paralel?

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Vreau sa inlocuiesc intr-un termometru un termistor de 620 ohmi pe care nu-l gasesc pe nicaieri. Daca pun in paralel 1k cu 1k5 (de la conex) o sa tina figura?

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Da, merge, dar e poosibil sa fie nevoie sa il recalibrezi. Legea de variatie rezistenta/temperatura poate fi usor diferita de cea a termistorului original.Cirip

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De legea de variatie ma temeam...ca termometrul nu e calibrabil. Tnx!

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Preferabil sa legi in serie,creste sensibilitatea.Pe cit posibil ,pt inertie mica,se pun termistori de dimensiuni mici.

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Termistorul pe care il aveai la inceput era unu` mai special ? Am vazut unii care erau liniari si atunci ma gandesc ca ai putea sa faci un circuit echivalent cu o dioda ca si senzor...sau nu ? :smt017

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Era incapsulat din constructie si statea in intemperii...cred ca d-aia a cedat. Sa-l desfac era aproape inutil, prea mic si prea bine construit. Asa ca am conectat un potentiometru si l-am reglat pina a aratat 20 de grade, pe care a avut-o la 620 ohmi. Acu ca m-ati bagat la idei, o sa-i scot caracteristica in citeva puncte, sa le compar daca gasesc ceva. Sper sa nu fie liniar, ca era de uz general.

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