I have simple IR receiver without any modulators, which reacts for IR wave (940 nm) link , I connected it as on this schema
I beam on this receiver with laser diode with 650 nm lenght wave light. It reacts, but I would like to improve this reaction.
Right now, when I don't blink there is 1.6 V bettwen IR receiver (LED is OFF), and when I blink with laser diode (650nm) there is 1.8 V (LED is ON)
The question is How can I improve the difference to be not only 0.2 V but much higher ? at least 1 or 2 Volts.