http://www.8051projects.net/ Learn to make simple microcontroller projects, pic, 8051, avr and arm projects. download 8051 projects, tutorials, libraries, sample codes. join the microcontroller discussion forum and ask doubts regarding electronics. the best source for 8051 over internet. Thu, 08 Jan 2009 22:39:50 -0800 http://backend.userland.com/rss092 i have some ldr and i want to make photo sensors with them !!! i tried to google but not found any circuit !!!i have small type ldr !!! please anybody <noauthor@nospam.com> http://www.8051projects.net/forum-t9752.html Hi,i don't know your skill level with micros but you can try reading the LDR value with ADC and micro, display the value on lcd - simple light/lux me Arun Kumar V<nura1002003@nospam.com> http://www.8051projects.net/forum-t9752.html note that an LDR responds in an extremely non-linear way to the light intensity. The resistance of a LDR aries from a few meg-ohms in dim light to a pdi33<islurpundalik@nospam.com> http://www.8051projects.net/forum-t9752.html thanks to both of u !!! i will try this rahuljin<friend.rahul@nospam.com> http://www.8051projects.net/forum-t9752.html pdi33 wrote ...note that an LDR responds in an extremely non-linear way to the light intensity. The resistance of a LDR aries from a few meg-ohms in electronicfreak<sachin.kolkar@nospam.com> http://www.8051projects.net/forum-t9752.html hi, No,you cannot connect LDR that way, you would be measuring Current and not Voltage.you need to connect one end of 1K resi to Gnd and connect the j Arun Kumar V<nura1002003@nospam.com> http://www.8051projects.net/forum-t9752.html