The circuit above is an light sensitive automatic switch which functions in absence of light. The IC 4060 works as an oscillator and the generated signal is applied to the base of T4 transistor.

Abstract: An automatic control circuit of LED street lamp is designed. The circuit is supplied with solar cell and stored electric energy with battery. It has three working modes of light control, ...

Koito Manufacturing has patented a multi-function vehicle lamp featuring multiple light emitting diodes. The design includes a switch that halts current to the tail input when the turn input is ...