Proximity detector

proximity detector circuit to detect any object in any direction within the range of 1ft.

make use of TSOP 1738 + IR LED for better detection of object...

yes but it will be uni directional... isnt it???

then use four of same kind.. he he..
or.. tell me if you have a better option

yes ,
if you want to detect magnetic objects... there are magnetic proximity sensors available...
or use ultra sonic sensor....
rotate them like a radar... they will fwtch u data (distance)...
which u can calculate.. to get proximity............
or use an rf tag reader and an rf coil / tag...

i m facing facing many problems in my project. i need solutions
Q1: is there any requirement of using 555 timer with the ir reciever pair of tsop series as the signal detected by the sensor is to be given to microcontroller?
Q2: is there any requirement of using interfacing device with the ir receiver except 555 timer?
Q3: substitue of tsop series1738?
Q: can we use at89s51 in place of at89c51??

Q1: is there any requirement of using 555 timer with the ir reciever pair of tsop series as the signal detected by the sensor is to be given to microcontroller?

anuj87gupta

Well no specific requirement just the frequency has to match. i mean if you are using TSOP1738, then 555 should generate 38Khz of frequency.

Q2: is there any requirement of using interfacing device with the ir receiver except 555 timer?

anuj87gupta

I actually did not understand your question properly. do you mean any other IC except 555? well as i said, you need a frequency generator which 555 does. this can also be done by nand gate (circuits available over internet) but personally i prefer 555.

Q3: substitue of tsop series1738?

anuj87gupta

using TSOP increase range of detection. for short range you can use IR+Phototransistor.

Q: can we use at89s51 in place of at89c51??

anuj87gupta

Yes you can use.