Customer:
I’m using an LM35DZ LM35 TO-92 temperature sensor and getting readings that don’t seem right. Can you explain where I’m going wrong?
Molim vas da mi objasnite gdje griješim, koristim senzor temperature LM35DZ LM35 TO-92 i dobivam očitanja iz priloga.
Hvala
Attachment omitted in migration: temp proba.doc
Originally submitted via the contact form on soldered.com on 2 June 2016. Migrated to the forum for community visibility.
Soldered Support:
Try adding a 4k7 pull-up resistor. The delay between readings should be at least 5 seconds. The sensor returns millivolts, which you need to convert to a meaningful value. According to the datasheet, the formula should be:
float temp = (referentniNapon * analognoOcitanje * 10) / 1024;
Preporučujemo da koristite neki od LM35 librarya. Probajte staviti pull-up 4k7 otpornik, svakako bi pauza između čitanja treba biti duža (5sekundi). Također, senzor vraća milivolte, trebali biste ih pretvoriti u nešto referentno. Prema datasheetu, formula bi bila ovakva: float temp = (referentniNapon * analognoOcitanje * 10) / 1024;