Jump to content
Electronics-Lab.com Community

light sensor help please

Recommended Posts

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 help

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...