IR distance sensors

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alvarorahul

Joined: 13 Apr 2005
Posts: 112
Helped: 5

22 Aug 2006 3:17 distance sensors price india

hi guys n gals

i am preparing for micromouse

so i want an efficient mechanism to detect the presence and absence of a wall abt 3-5 cms from the machine

i was thinking of using tsop 1738 but wid the transmitter that i made i am getting only a pulse at d o/p pin of tsop instead of a continuous active low signal:!:

pls help Crying or Very sad

if anyone cud tell me what i can do to remedy that or if anyone has a circuit that he/she has tested already it would be of gr8 help

thanks in advance

IanP

Joined: 05 Oct 2004
Posts: 6490
Helped: 1542
Location: West Coast

22 Aug 2006 3:44 sharp gp2d02 in india

Take a look at the GP2D02 distance sensor:
http://info.hobbyengineering.com/specs/SHARP-GP2D02.pdf
It produces digital distance readings from ≈100mm to 1000mm ..

Regards,
IanP

cristianp

Joined: 04 Jul 2006
Posts: 81
Helped: 9
Location: Romania

22 Aug 2006 9:44 Re: IR distance sensors

alvarorahul wrote:

hi guys n gals

i was thinking of using tsop 1738 but wid the transmitter that i made i am getting only a pulse at d o/p pin of tsop instead of a continuous active low signal:!:

TSOP1738 works in burst mode. If your transmiter send a continous 38kHz signal, the signal is supressed by TSOP1738 circuitry. In this case, only a pulse will be generated.
In data sheet (www.vishay.com/docs/82030/82030.pdf) all suitable data format are described on page 3.

alvarorahul

Joined: 13 Apr 2005
Posts: 112
Helped: 5

23 Aug 2006 4:38 IR distance sensors

hey thanks cristianp & IanP that was of gr8 help

@IanP

i would like to know what is d approx. cost of d distance sensor that u mentioned ?

also can anyone tell me where i can get it in india????

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IanP

Joined: 05 Oct 2004
Posts: 6490
Helped: 1542
Location: West Coast

23 Aug 2006 4:46 Re: IR distance sensors

I don't know where to get it in India - mabe you can contact SHARP-India ..
Anyhow, here is a couple of references incluing prices:
http://www.robotoz.com.au/detail.asp?prdCode=IRDDS-01
http://www.junun.org/MarkIII/Info.jsp?item=30

Regards,
IanP

alvarorahul

Joined: 13 Apr 2005
Posts: 112
Helped: 5

23 Aug 2006 9:23 IR distance sensors

hey IanP
do u have any distance sensors in a lower price range??? my budget is not that high

nipun

Joined: 13 Dec 2005
Posts: 47
Helped: 2

24 Aug 2006 7:39 Re: IR distance sensors

instead of tsops use ir tx /rx pairs which r very common.u can use in top down mode or side seeing type.if using side seeing fashion, calibrate the values given by d ADC to ur logic n use it to detect walls .