Light Level Indicator Using a Window Comparator

Published:2012/10/22 21:50:00 Author:muriel | Keyword: Light Level , Indicator, Window Comparator | From:SeekIC

The second example below uses a LDR (light dependent resistor) to indicatesome desired light level. The LDR has a large dynimic range and varies inresistance from less than 100 ohms on a cloudy day to over a megohm in totaldarkness. A 2K pot was used to adjust the window range for usual room lightconditions. This setup might also be used to indicate sunrise/sunset conditions.



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