Hi all , Happy New Year!
I want to make a IR receiver by using phototransistor, however if I simply hook up as the circuit shown in the image 1, the photo transistor will ON by the day light or bright light, hence the o/p of the op amp would always hi.
Is there a simple way to block the unwanted light allowing only the IR signal?
If I add a capacitor (as hi-pass filter) as shown image 2, will it work? Or a RC-tank is best way out?
Thanks
oookey
I want to make a IR receiver by using phototransistor, however if I simply hook up as the circuit shown in the image 1, the photo transistor will ON by the day light or bright light, hence the o/p of the op amp would always hi.
Is there a simple way to block the unwanted light allowing only the IR signal?
If I add a capacitor (as hi-pass filter) as shown image 2, will it work? Or a RC-tank is best way out?
Thanks
oookey
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