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ichigohnvn
12-24-2005, 02:08 AM
hi i'm new to robotics. Currently, I'm working on a project regarding region coverage mobile robot. I intend to use tactile sensors for obstacle detection.

I would appreciate if anyone can give me more info. about this kind of sensor.

Thanks a million. :)

addy
12-24-2005, 02:15 AM
u can implement obstacle avoiding by two methods....
one is via ir leds.... but they don give gud range{easiest method}...

and the other one is via a sonar{excellent response and works for gr8 distances}.

u ll get all the info u want in the forum...
jus search through.....

ichigohnvn
12-24-2005, 02:21 AM
hmm can we use the tactile sensor such as bump sensor...I have a little budget for this project :(

Thank you all.

addy
12-24-2005, 02:25 AM
if ur budget is low then go for ir.......
use tsop1738 as a receiver....
modulate the ir at the transmitter end at about 38khz and the receiver
will give u digital outputs....
logic 1:: wen ir is not received back.{i.e.obstacle is not present in front}.
logic 0:: wen ir is received back{i.e.obstacle is present in front}.
the entire assembly will cost u about 30 to 35 bucks only.....

ichigohnvn
12-24-2005, 08:49 AM
Thank you very much.

Could u tell me more about the price?

About the sensor system design, I intend to use three of such sensors on each side but the back for job such as region coverage. The size of the robot is about 10cm in diameter.

addy
12-24-2005, 09:48 AM
a simple ir transmitter ll cost u about 3 bucks{atleast in bangalore}.
then tsop1738 ll cost u about 25 bucks.
one transistor,say bc547 ll be around 5 bucks{not sure}...
and one resistor... tats it....
ur ir module is ready... and all for only 33 bucks.
if u r using tsop, u need to generate 38khz either by a mic or by a 555 timer....

jack
12-25-2005, 07:40 PM
one transistor,say bc547 ll be around 5 bucks{not sure}...


Its only 1buck my dear....

addy
12-25-2005, 11:46 PM
hi jack,
I wrote::
"one transistor,say bc547 ll be around 5 bucks{not sure}..."

i hope u read tat "not sure" in the bracket after bc547......
1 buck is better anyway.....