Need help fot finding circuit diagram14

[shweta ahuja]

Need help fot finding circuit diagram

I need a ciruit diagram for proximity sensor or distance detector or safety for blind..any of this using mc 89c51..i've tried electronics garage but that has some issues..please mail

 

[vicky001.iith]

U can use MPR121.I worked on it,but don't have complete circuit,as it was designed by my friend,will email you as soon i get the circuit
**broken link removed**

 

[shweta ahuja]

Thank you but I compulsorily need to use 89c51 or 89c52..