Interfatare senzor capacitiv cu PIC

[Bird]

Va salut !Dati-mi va rog niste sfaturi cum sa abordez realizarea interfetei de la un senzor capacitiv (de umiditate ) la un PIC . Multumesc !

[bogdan_]

Da mai multe detalii despre senzor. In general in datasheetul de la senzor iti spune cum sa il pui intr-un oscilator.Ai putea sa faci cu senzorul un oscilator cu 555 de exemplu, pic-ul apoi citind frecventa.

[Bird]

Da mai multe detalii despre senzor.

S-ar parea ca...nu e ce am crezut eu : CHR-O1 Humidity Resistance CHR-O1 ???? Principle ? ?Introduction of the functional polymer membrane coated with a conductive electrode in the ceramic substrate to form a resistance change with the relative humidity changes in the number of pairs of sensitive components and electrical conduction mechanism for the impact of the presence of water molecules within the conductive polymer membrane ion-migration rate Features Stable, low drift, high accuracy, fast response characteristics, high reliability, water resistance is good, replace the imported products use Dehumidifier, humidifier, electronic temperature and humidity table cooling, drying, weather characteristic parameters Operating temperature range The maximum temperature 0? ?+85? 0 ? ~ +85 ?120? 120 ? Detection range 20 ? 90%RH 20 ~ 90% RH Detection accuracy ?5% RH ? 5% RH???? Voltage AC 1V ? 50 ? 2 K Hz ? AC 1V (50 ~ 2 K Hz)????& ?? Characteristic impedance & Scope 30(21 ? 45)K?(60%RH,25 ? ) 30 (21 ~ 45) K? (60% RH, 25 ?)???? Response Time ? 12 s (20% ? 90%) ? 12 s (20% ~ 90%)????? / ?) Humidity Drift (/ year) ?2% RH ? 2% RH?? Wet hysteresis ? 1.5%RH ? 1.5% RH .......il atac cu frecventa obtinuta cu un 555 ? scot din PIC 2Khz ?....si mai departe ?