> Have you considered a CDS cell and an ohmmeter?=20 > Both are available at any RadioShack. But he is asking for a Luxmeter, so I would assume that it needs to be calibrated in some way, and a cdS cell with ohm meter would be uncalibrated ... --=20 Scanned by iCritical. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .