sharp GP2Y0A21YK0F ir distance sensor

robban35

HI!

Is there any code example for the sharp distance sensor ( GP2Y0A21YK0F )
or how do i measure distance without an adc

regards

robban

Franklin

how do i measure distance without an adc

Take a look at the RCTIME command.

robban35

ok,i have build it like this although i use pin 10 instead of pin 3

and the program´s

time VAR Word

go:
HIGH 10
PAUSE 1
RCTIME 10,1,time
DEBUG DEC time,CR

PAUSE 100
GOTO go

how do i convert "time" to actual range like mm/cm/dm/ft?

erco

As long as you're getting numbers from RCTime that vary based on the distance to an object, that's all the unit can do. The numbers are not a linear measurement, you have to test it yourself to interpret those numbers and calibrate within your program. You'll want to study the datasheet extensively:

http://www.acroname.com/robotics/parts/gp2y0a21yk_e.pdf

electronlude97

If you are using a 8051 controller, you can set a pin like 1.0 to open drain, digital and hook the signal line from the sharp ir to that pin. When it is close enough the sharp sensor will output a voltage high enough to send a HIGH to the pin and trigger a routine or jnb.

erco

http://www.parallax.com/dl/docs/prod/acc/SharpGP2D12Snrs.pdf Bookmark it!

A goldmine of information that mysteriously doesn't show up in a search from Parallax.com. Have the Sharp sensors have lost their considerable power to charm Parallax?