Discussion in "Project Doubts" started by    Chinmay Das    Mar 10, 2009.
Thu Feb 04 2010, 04:46 PM
..


[ Edited Tue Feb 16 2010, 03:48 PM ]
Wed Mar 10 2010, 01:12 AM
Hey guys I am facing the same problem which chinmay faced at the first run

I am getting the same boxes in my LCD bt i have checked the connections

P0.0 is connected to DB0 and so on

Plzz help me out
Wed Mar 10 2010, 07:05 PM
pullups are on place?

well these all problems are solved now. it was long back when chinmay faced these problems. so you need to check your circuit carefully. must be some wiring issues.
Thu Mar 11 2010, 04:03 AM
anybody please give me the clear circuit of humidity sensor
the image in zip is quite confusing it has got 4 terminals but the actual sensor has 3 terminals and the element in the shunt is not recognizable
also is this the hih4000-001 or other i uses hih 4000-001 sensor


[ Edited Thu Mar 11 2010, 04:05 AM ]
Mon Mar 15 2010, 11:07 AM
some body please reply
ajay sir its very urgent please help give me the clear circuit of humidity sensor

Tue Mar 16 2010, 03:43 PM
Gaurav i already replied you.

open datasheet of HIH sensor, and there are only 3 pins -ve, o/p and +ve all goes to right place. there is a cap and resistance between -ve and o/p and +ve goes to VCC.

dont confuse youself with the above circuit too much. If you can update the circuit later on please do it, I would update the project considering your contribution to it.
 gaurav007 like this.
Tue Mar 16 2010, 03:49 PM
ok i get the point thanks once again
Wed Mar 31 2010, 07:56 PM
i hav finished the hardware work
I am facing the same problem which chinmay faced at the first run

I am getting the same boxes in my LCD bt i have checked the connections

P0.0 is connected to DB0 and so on

Plzz help me out
Thu Apr 03 2014, 05:05 PM
only changes in varible resistor(between vcc,gnd & 3 pin of lcd contrast chnge)...as like 0 ohm...otherwise you coonect lcd wrong way..

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