Someone Electro
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I am designing a simple IR distance sensor for a robot. Its main job is to estimate how the walls around the robot are. It runs trough a maze so it needs to look left and right and also forwards. The left and right sensors will need to work for aprox 4 to 15 cm while the front sensor will need to see up to 30 or 40 cm.
The circuit i made blinks a LED at about 500Hz and then measures the bounced back signal. Because i will need 3 of these i try to keep component count down and use only 1 opamp per sensor. The circuit is basically a very high gain active high pass filter that has a 0,6V virtual ground (to compensate for the drop on the output rectifier) Also i found out that i needed to put a filter on the phototransistor circuit as it was slightly picking up the 500Hz signal off the power rails.
So i want to know if my circuit has any design flaws that might become problematic and suggestions how to improve on the linearity and such. I designed this from scratch so i guess some of you analog guys have flaws to point out.
EDIT: The opamp is MCP6002
The circuit i made blinks a LED at about 500Hz and then measures the bounced back signal. Because i will need 3 of these i try to keep component count down and use only 1 opamp per sensor. The circuit is basically a very high gain active high pass filter that has a 0,6V virtual ground (to compensate for the drop on the output rectifier) Also i found out that i needed to put a filter on the phototransistor circuit as it was slightly picking up the 500Hz signal off the power rails.
So i want to know if my circuit has any design flaws that might become problematic and suggestions how to improve on the linearity and such. I designed this from scratch so i guess some of you analog guys have flaws to point out.
EDIT: The opamp is MCP6002
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