I need some guidance on how to accomplish this task. I am fine when it comes to programming but on the electrical connections I need some help.
Here is the quick background. I am using a PIC 16F684 inside of another device which has a 3.0v supply (two AA batteries). The problem is that there is no switched 3.0v power source inside the device so even when it is off the PIC is still drawing power. The device does have a 1.5V switched power source that I though I could use to switch power to the PIC using a NPN transistor. The issue is that when the device is off several of the connections from the I/O pins of the PIC are connected to 0V and the PIC still powers on, I believe this is called parasitic power.
So I am wondering what I can use to switch the 3V to the PIC on the high side, so I do not have the parasitic power problem, using the available 1.5v switched source in the device.
I have been reading all day and it seems like a small signal logic level Mosfet could possibly be used but I'm still a little confused if that is what I need.
Also looking to keep it as simple as possible.
hopefully this is understandable and sorry for my lack of electronic circuit knowledge. That is why I am here
Chris
Here is the quick background. I am using a PIC 16F684 inside of another device which has a 3.0v supply (two AA batteries). The problem is that there is no switched 3.0v power source inside the device so even when it is off the PIC is still drawing power. The device does have a 1.5V switched power source that I though I could use to switch power to the PIC using a NPN transistor. The issue is that when the device is off several of the connections from the I/O pins of the PIC are connected to 0V and the PIC still powers on, I believe this is called parasitic power.
So I am wondering what I can use to switch the 3V to the PIC on the high side, so I do not have the parasitic power problem, using the available 1.5v switched source in the device.
I have been reading all day and it seems like a small signal logic level Mosfet could possibly be used but I'm still a little confused if that is what I need.
Also looking to keep it as simple as possible.
hopefully this is understandable and sorry for my lack of electronic circuit knowledge. That is why I am here
Chris