ultrasonic range finder

[weijie]

Hi sir,
I am currently doing a ultrasonic range finder circuit to interface with my 8051. Problem that i facing now is the maximum distance it can measure. The website claim that ultrasonic sound will become bigger when distance increase. Can you give me any suggestion to detect longer distance?
My project requires 10m range. Laser sensor is not preferred.

Link: http://hobby_elec.piclist.com/e_pic6_6.htm

[Binu]

You can only use the ultrasonic sensors, try with some more powered ultrasonic sensors.

[Herder]

hi sir binu

can I ask something about AT89c2051 code for matrix keypad, pls hope you reply.

thanks

[Binu]

Did you check the code library page. also check the projects page in which some projects have matrix keypads with it.

[skg377]

pl help me
my project is
40khz ulrtasonic distance meter using 16*2 lcd. & 89c2051

[Binu]

check here
http://microcodes.info/search/result/?searchid=13