You can use an LDR (light dependent resistor) connected to a simple transistor amplifier and then a flip-flop.How can I make a switch for a circuit that is turned on and off using light I need that when light stimulates it it is turned on and remains on till light stimulate it again to turn it off
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how can make a system which prevents light above a certain intensity reaching the plants in a greenhouse using light activated switchbad link...............
this had me rollin ...Stand next to the switch, when you see the light, flick the switch.
auto shading glass panels (i believe they go clear when electric field is applied). its gotta be some sort of feedback system. as the light level on photo-voltaic cell goes up the glass panel gets darker, etc, keeping the incoming light level where you want it. in real basic terms a NPN bipolar can work. voltaic cell is setup to just bias the base. some load is connected between +v and collector. signal to panel is taken right from the collector. as transistor is driven harder the voltage at the collector will decrease, thus less electric field on the panel and the darker it gets. not really sure if this theory is real world practical, but its a basic start.how can make a system which prevents light above a certain intensity reaching the plants in a greenhouse using light activated switch