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Casting Electronics →  January 5, 2010

Tutorial on casting electronic circuits in Silicone and Polyurethane.

Light Sensor Circuit →  January 4, 2010

Light Sensor Circuit Simple circuit using an Light dependent resistor (LDR) to turn on an LED when dark. What you need: 1 transistor BC497C (NPN) 1 Light dependent resistor 1 variable resistor 0-50K 2 resistors 1K 1 LED Schematic Via Cross Lab DIY Another schematic for a Light Sensor Circuit