mphotis Posted May 8, 2005 Report Share Posted May 8, 2005 hey guys, i got a problem...can someone give me a VERY simple circuit that allows me to switch a bp103 phototransistor on when it senses light from a standard red LED. the phototransistor is gonna be kept in a dark box with the led.when the led is off the output from the phototransistor will be 0v. when the led switches on, the phototransistor will switch on and give me around 5Volts out...the circuit is powered by 5V..please helpthanx Quote Link to comment Share on other sites More sharing options...
EdwardM Posted May 8, 2005 Report Share Posted May 8, 2005 Hi mphotisyou could try experimenting with something like this...Best of LuckEd Quote Link to comment Share on other sites More sharing options...
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