Soldering station

[Archangel]

Sure enough, it's not Kelvin... just sayin

Hey! He (Kelvin) used to work for me . . .

[Jerson]

I can hazard a guess that changing this section of code

     vt=adval * 500      
            vt=div32 1023 
            grup=vt+grup  
            PAUSE 10

to this

vt=adval >> 1
grup=vt+grup
PAUSE 10

might save you a bit of code & ram space. But, I've not checked this, so, you'll beware. Again, if you notice,
I've used an approximation of divide by 2(500/1000) for 500/1023 instead of 1/2.046 I do not think it will matter much if you calibrate
the readings.

[fratello]

Wow ! Great support here ! Thanks to all !!!
In first post You can see : the temperature it's in Celsius degrees. The PID control it's a verry good ideea; sure I will use in future projects !
But...I try to do like Mr. Ioannis :

if w1 < (calibra - 5) then pwm mosfet 255, 300
if w1 < (calibra - 3) then pwm mosfet 155, 250
if w1 < (calibra - 1) then pwm mosfet 100, 200
endif
endif
endif

I think to reduce the "power" of heating by adjusting the pwm factors... It's OK ?!

[Ioannis]

1. On the above code you do not need the 3 endif.

2. The credit is not for me. Maybe Jerson's?

Ioannis

[fratello]

Something like this : http://www.picbasic.co.uk/forum/show...7665#post97665

[Ioannis]

Oh, I see. OK, but take into account what I noted on the post.

It is slow and may oscillate. I am sure it will. Also depending on the resolution, the dead band may be large. Of course the larger it is the less it will oscillate.

Ioannis

[fratello]

I wrote this :

if w1 < (calibra - 3) then pwm mosfet 155, 250 
if w1 < (calibra - 1) then pwm mosfet 100, 200

but the heating start ONLY when w1 < (calibra - 3) !
Why don't start when w1 < (calibra - 1) ?!?