Indicator light using Windows Comparison Circuit Diagram
This circuit indicator light level using operational amplifier , LDR and indiction is by LEDs . There are a variety of LDR , its resistance varies from less than 100 ohms on a cloudy day in more than one megohm in complete darkness. A trimmer 2K was used to adjust the range of comparison. This configuration can also be used to indicate the reconnoiter . Indicator light using Windows Comparison Circuit Diagram