memory game using a PIC

The PC board has been designed to accept either a PIC16F84A or PIC16F628. With the introduction of the`628 to the world market, it has taken over from the PIC16F84A and we will be ceasing to design projects for the `F84 and concentrating on the cheaper `F628. The two main improvements with this chip are the lower price and internal 4MHz oscillator (as well as an internal 37kHz oscillator for low-power applications) - a saving of 2 external components. It has three extra in/out lines and many extra files.
memory game using a PIC - schematic

The circuit consists of two parts - the power supply and the microcontroller. We often put very little thought into the power supply section of a project and expect a battery to do the job perfectly. It`s not until you connect a battery and watch

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