I have a battery powered application where I want the picaxe to turn itself off. That is to say, disconnect power to itself.
During the off state the circuit must use zero current and wait till a momentary pushbutton is pressed. I have thought of this solution
http://www.members.optusnet.com.au/philpawlowski/psucontrol
In the off state, there is no current used up at all. When the Power pushbutton is momentarily pressed, the picaxe gets power and immediately latches the relay, which continues the power supply after the momentary switch is released. The circuit then does what it needs to do, and turns off once it is done by releasing the relay.
This works, but I would like a solid state solution. I don't think a transistor would work for this purpose, as a transistor needs a "non floating" ground. Is there another way to do this without a physical relay?
I know there are techniques to decrease the amount of power the picaxe can use, but I'd prefer a circuit that shuts everything off including the picaxe.
Could a logic level mosfet be used for this purpose? I'm not too familiar with mosfets.
During the off state the circuit must use zero current and wait till a momentary pushbutton is pressed. I have thought of this solution
http://www.members.optusnet.com.au/philpawlowski/psucontrol
In the off state, there is no current used up at all. When the Power pushbutton is momentarily pressed, the picaxe gets power and immediately latches the relay, which continues the power supply after the momentary switch is released. The circuit then does what it needs to do, and turns off once it is done by releasing the relay.
This works, but I would like a solid state solution. I don't think a transistor would work for this purpose, as a transistor needs a "non floating" ground. Is there another way to do this without a physical relay?
I know there are techniques to decrease the amount of power the picaxe can use, but I'd prefer a circuit that shuts everything off including the picaxe.
Could a logic level mosfet be used for this purpose? I'm not too familiar with mosfets.