Phototransistor

i hav been trying making a light sensor using L14G3,bit i m not getting results.Plz tell me about its biasing.

Post the schematic you used. Google contains lots of crappy ones.

electronspeed said:

i hav been trying making a light sensor using L14G3,bit i m not getting results.Plz tell me about its biasing.

Click to expand...

hi,

I replied to your other thread, yesterday... https://www.electro-tech-online.com/threads/phototransistor.103048/

Still awaiting your response.

I have attached the schematics for my circuit.Instead of 2N222 am using 2n577.On taking load through emitter i am getting zero volt.Also instead of grounding the emitter leg i am giving it to my opamp ,i am getting 1.5V as i/p when light is falling on photo-transistor whereas .5v when no light is falling on it.I am using IR as light source.