Problems with 12F675

[fratello]

Thanks for reply ! I use the schematic from post #1 and the code continuous improved in this thread. I made this changes on the last code posted by Mr.Darell. I say that I use this schematic on automobile ; I think every way to reduce the consumption it's necessary...or maybe the battery of my car give enough current, even I don't start the engine for a long period...It is not a verry big problem, but I want to understand the "mechanism" of the sleep procedure, and I am dissatisfied because, even I try all the variants, the obvious results are not present ! Just I try to make this project almost perfect and I really appreciate the support of all. Sorry if I disturb somebody...or if I became boring...

[Darrel Taylor]

fratello,

Have you changed anything?
I see you put the WDT back to OFF ... good.

Here's a picture of my breadoard of your circuit, in case you see something different.
Obviously, I'm using LED's instead of relays, but the rest should be the same.

When in SLEEP mode, I measure about 8 µA on my cheap DVM.

The only time it's not in sleep mode, an LED(relay) is ON, so that current is about 7 mA.



Here's the program I'm currently using.

[Archangel]

it is not a very big problem, but I want to understand the "mechanism" of the sleep procedure, and I am dissatisfied because, even I try all the variants, the obvious results are not present ! Just I try to make this project almost perfect and I really appreciate the support of all. Sorry if I disturb somebody...or if I became boring...

Ya, Me too . . . You are not disturbing, or boring me, I just need to be clear on what you are doing, so as to understand, the post about PICadilly confused me.

[fratello]

This is schematic I use. With my FUKE DT-830B I measure 3.5 mA -all the time- with no button push (so both relay OFF) and about 37 mA with one relay ON (without motor, of course). I remove the PIC and the current consumption is 2.5 mA (the two transistors ?) .
I use the same code ; I compile him after copy/paste of Yours ! Maybe it's because of my multimeter ? Anyway, thank You all so much for support !

[Archangel]

This is schematic I use. With my FUKE DT-830B I measure 3.5 mA -all the time- with no button push (so both relay OFF) and about 37 mA with one relay ON (without motor, of course). I remove the PIC and the current consumption is 2.5 mA (the two transistors ?) .
I use the same code ; I compile him after copy/paste of Yours ! Maybe it's because of my multimeter ? Anyway, thank You all so much for support !

Hi fratello, You could play with some resistors to bias those transistors so the base is more negative than the emitter to cause them to turn off more, do not tristate the outputs, drive them low, they will stay that way in sleep ( if I understand the data sheet that is ) . Try measuring the current with the relays out, betcha you get a low reading like Darrel did, MeThinks the logic zero on the port is still above zero volts (maybe due to internal leakage collector to base) giving the transistor some drive to increase the drain, try putting some emitter resistors in and see if it changes anything.