Dark Detecting Transistor Circuit Found often in solar garden lights that only turn on when it gets dark, this circuit is surprisingly simple. Follow along gto make one yourself. Materials Needed: 1/4" Maker Tape 2N3904 NPN Transistor 1000 Ohm Resistor Light Dependent Resistor CR2032 Battery Jumbo 10mm Diffused LED Printable Template Scissors Written instructions for […]