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vsmguy
08-09-2006, 07:43 AM
Hi

I just checked out the price list here and it seems very old.

I am getting TSOP1738 for Rs 15

Ultrasonic (SONAR) TXRX for Rs 350

L239D - Rs 75

Are these too much ?

I am also on the lookout for a good IR circuit which can give me range of atleast 1cm to 2m.

ppppking04
08-09-2006, 08:55 AM
Hello,

The prices you mentioned are okay maybe even a bit on the lower side :)
Go get them!

As for getting a good range try pulsing out the IR led's with a high current using low series resistance and a low duty cycle (using TSOP rite )... search the forum for this though...there are a few posts already dealing with this...

You will want to be careful when passing a high current thru the Led

allbits
08-09-2006, 06:29 PM
hi... TSOP and 293 is sure cheap... but ultrasonic sensors..h,, i used to get it for 250-270 here in cochin. as for TSOP, i would suggest Vishay itself, as the other ones (unidentified ones) sure will give you unidentified problems...

vsmguy
08-10-2006, 09:43 AM
I am specially perturbed about the cost of the SONAR snesors..

I think it is available at arount Rs 135 ?

Can anyone confirm ?

Also, TSOP1738 is not maked as Vishay... I know how TSOP1738 looks like, but how do I know if it's from Vishay or not ?

allbits
08-10-2006, 04:54 PM
Also, TSOP1738 is not maked as Vishay... I know how TSOP1738 looks like, but how do I know if it's from Vishay or not ?

well... thats something that i also dont know. Hopefully, someone from the forum will show us a way...

I just ask the guy if its from vishay. But there are other companies whose TSOPs are good, but the poor ones, you can tell it in a glance.

yogi
08-10-2006, 06:20 PM
http://static.flickr.com/21/183378640_9c64a3b77c_m.jpg

something like this. If you do a google search then u will get it. If you go to a n electronics shop ask them for tv remote receiver or IR sensor. Sometimes when I ask for photodiode they give me tsop. See the above figure u will get it. It costs around Rs.15 because it is used for decoding TV remotes.

Bibin John
www.booksbybibin.tk

Supario
08-11-2006, 11:41 AM
I bought an ultrasonic transducer pair for Rs 110. They worked nicely. I've added them and two more pairs to my robot.

vsmguy
08-27-2006, 04:58 PM
I bought an ultrasonic transducer pair for Rs 110. They worked nicely. I've added them and two more pairs to my robot.

Please Supario,

be nice and upload a few pictures of how your sensors look like.

If I can use it to make my own SRF-04 Ultrasonics sensor, I will buy the ultrasonics sensors for you and also make you a few SRF-04.

Promise !!