When I use a 12v dc power adapter connected to a 7805 regulator to provide a voltage, my circuit works fine.
BUT let's say instead of that, I have 3 regular AA batteries to provide a voltage. The voltage across the batteries starts out at around 4.5 V when they are first connected, but the voltage drops something like 0.02V every second or so, until the voltage is so low that my circuit doesn't work anymore.
The circuit I am refering to is nothing more than a PIC16F83. I have also seen the same results when using an LM386.
What could be causing this? Am I not using the batteries in the right way?
BUT let's say instead of that, I have 3 regular AA batteries to provide a voltage. The voltage across the batteries starts out at around 4.5 V when they are first connected, but the voltage drops something like 0.02V every second or so, until the voltage is so low that my circuit doesn't work anymore.
The circuit I am refering to is nothing more than a PIC16F83. I have also seen the same results when using an LM386.
What could be causing this? Am I not using the batteries in the right way?