Problems with 12F675

[fratello]

OOps ! I have a big problem : but1 don't work proper ! I double/triple check all ; I change the button, but nothing... After a few press on but1 or EVEN on but2, but1 became inopperating ! If press but2, rel2 go high and but1 stop him, but don't make rel1 high ! Or, if rel2 go low because of overload, but1 don't work not at all ! Must disconnect power source for 're-starting' him...
But2 works verry fine, but but1 don't !!! I really don't understand ! I check everything for so many times, I change even PIC..

Some problem !!!!

[fratello]

I change the resistors from transistors base with 2k2 instead 4k7; nothing !!!
I change the transistors (BC337) with others (2SC1815; 2SC9014) but the results are all the time the same : after couple of pressing on but1 OR but2 (doesn't matter !) but2 (and rel2) works fine but but1 (rel1-of course) became inopperating !

[Archangel]

Hi Fratello,
Ok, in the crude drawing I posted, R3 is selected to limit the current going through the relay coil. r1 is selected to limit current going into the transistor's base, and R2 is the trick. R2 needs to be smaller than R3, but not so low a value so as to inhibit the transistors operation. R2 will increase the ON current, but should help drive the transistor to "cut off".
in this link:http://engr.astate.edu/jdg/Electroni...orBiasing.html
Scroll down to Figure 5.
RC is your relay coil represented as a resistor
R1 is the resistor from the pic port, I know it is shown as connected to Vcc, but when your port goes high that is exactly what you have
R2 is the "pulldown resistor, causing cutoff
RE is the current limiting resistor for the load.

[fratello]

The problem are sure somewhere in the code ! The same code, how I say earlier, work if @SLEEP (and just this command !!!) is disabled !!!
Like in the previous code, which work - for real !- just after adding little pause in different places, I think this code is good, but need...something, I don't know what ! I spend all my day trying different variant of code...with pause from 20 to 100, but useless...I don't lose my hope ! Cheers !

[Darrel Taylor]

If it is a 78L05 ... then that's where your 3mA is going. (Quiescent Current)
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[fratello]

Hi Mr.Darrel !
Maybe I can't explain verry clear !
If @SLEEP command is 'enable', the repause current is 2.5 mA (like without PIC !). But, after couple of press of but1 or but2, but1 don't work more ! Need to disconnect power !
If @SLEEP is 'disable' (by ' in front of her), the repause current is 3.5 mA, and but1 and but2 works without problems ! I do not change nothing in schematic !
Just use @SLEEP (2.5 mA ; problems with but1) or not (3.5 mA ; not problems)
Sorry for my poor english...

[Darrel Taylor]

Your problems are NOT in the program, since the same program is running here without any problems.

What is that part I pointed to above?

Where are the Flyback diodes for the relay coils?

Where are the capacitors ... decoupling, and on the regulator?
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