next topic »

[Reply #15 on:]

The items that are on the battery side of the power switch are causing the problem. You will have more that enough tome for the Arduino to wake up.. If Not then rewire those inputs so that they pull down a processor pin that is powered up when the Arduino is. The bias path for the Arduino IS the stuff that isn't switched off when the Arduino is.

Doc

so, if I understand you right, the arduino is discharging through my chips when disconnected?

[Reply #16 on:]

When the processor is not correctly powered, electricity can "leak through".  In addition to causing the problem you are having, there is a high probability that it will damage the processor.  Move SW1.

[Reply #17 on:]

Move SW1 (see attached.)

[Reply #18 on:]

OH MY GOODNESS

that is as plain as day. duh. big duh. I will test ASAP (i'm swamped with other homework at the moment)

but thank-you everyone. I cannot believe I didn't catch that.

will post back tomorrow!

[Reply #19 on:]

The items that are on the battery side of the power switch are causing the problem.

The simple solution is to move them to the other switch connection point so they are also operated by the power switch.

[Reply #20 on:]

couldn't wait... it worked!

My actual project is using a signal from ANOTHER chip where SW1 is, so I'm just going to use a NPN2904 transistor where SW1 is. Perfection! for now lol

[Reply #21 on:]

Karma ponits points... they're almost like getting paid for this.