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Hi experts,

please give me some examples of temperature sensors for greenhouse...

Please give me also the sample codes or just give links
thanks a lot

my previous problem solved..:)

do you have an ides how to program using sensor as input? That when it is high something would activate then when it is low still activate.

yes i connect the uln2803 to ground...

should i put switch to MCLR? or just connect to 10K and +5v?

it is ok to connect the 4.7k resistor directly to the supply and MCLR without switch?

the schematic above is the one i used to...

i am using pic16f84 and uln2803...

here is the code:

define osc 4
ti var byte
c var byte
z var byte

i didnt use the MCLR in my mcu...

what is the right thing to do?

what's wrong when i on my circuit..the led i used as indicator for the sequence will only standby on the first step..and when i touch the positive side of the supply it start to run..i construct my...

thank you for your help..i will try your suggestions...the label close1(reverse gripper stepper) , i only edit it before i post the program so that to clarify the operation of my project..actually is...

i am using unipolar stepper motor...i connect the pic to uln2803...then connect to the stepper motor...

in your own experience..what time delay usually used in order the stepper to operate...

what is the correct speed or delay am i using in order to run it well?

it necessary to define the external oscillator in the program?like:

define osc 4

please help me..we have a project using stepper motor..we are making simple linear robot..when the circuit is on it will automatically open the gripper then after a seconds it will close the grip...