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boya
02-07-2005, 01:54 PM
hi guys,

i want info on sonar sensors. also how to make a cheap home made sonar sensor for robots.

vidur
02-14-2005, 02:15 PM
Use a Piezo ceramic sensor

The same thing you find in EFY kits or piezo buzzers

I've tried tweeters to...but they dont work

Vidur

subot_robot
02-15-2005, 11:51 AM
Hi,
For Sonar sensors you have to use 40kHz ultrasonic transmitter receiver pair which will cost around Rs.320. If you want good sonar distance finder you have to use them and as far as i know there is no other cheaper alternatives.

Subot_robot

02-15-2005, 01:59 PM
Do you know anybody in India who makes them for Rs 320...

I'm asking this coz a friend of mine had to get 'em imported for $79/- from USA.....

I"d love to know who sells it so cheap here...do u know any dealer in Delhi...

or perhaps a part number for reference?

Vidur

subot_robot
02-15-2005, 11:32 PM
Hi,
I think your friend imported a sonar distance finder circuit. What I told is Ultrasonic sensor. Ultrasonic sensors are used in sonar distance finder circuit or obstacle avoidance circuit. I don't know anybody in India who makes these circuits. You should be able to get sensors in Delhi, ask any robotics india member from delhi. if you search internet you will find a number of circuits and you can build yourself one. That is the only cheapest way to get ultrasonic distance finder or obstacle avoidance circuit. also search forum here in robotics india. you will come across some circuits.

subot_robot

addy
12-30-2005, 07:15 PM
in India who makes them for Rs 320...
(':P')

tats too cheap...
i believe tat guy must be making dem in home and selling them.
tats the only way to make dem tat cheaper..
do post if u find out who tat guy is...

milindshastri
08-30-2006, 12:17 AM
http://nod.phpwebhosting.com/~robotics/modules.php?name=Wiki&page=Delhi
Everest Sales Corporation
Shop No. 629
Lajpat Rai market delhi -110006
Ph:23869522, 23869516
Deals in : Motors ( All types )
Geared Motors All voltages and RPM available
Stepper motors ; good variety
Servo motors ;
AC motors ;
Synchronous motors;
Geared belts;
Bearings;
Bushes;
Gears; Wide Range
Drivers;
RF Modules; 315 mhz - 433 mhz, 10hz - 10 khz
IR Modules;
Encoders;
Ultra Sonic Sensors; 40khz
Proximity Sensors;
Switches; many variety
LEDs;
Connectors;
ICs;
LCD displays; etc.
Email: a2m2a2njain@yahoo.com
(good quality and standard prices)

Try these guys....they quoted a price of Rs175 for a 40Khz ultrasonic transmitter reciever pair- 'GL 40T/40P' or something like that a few days back

ice
08-31-2006, 07:37 PM
imported for $79/- from USA.....


It comes for around $25
http://www.acroname.com/robotics/parts/R93-SRF04.html