Microcomputer PIC16F84A-20/P, commonly used in electronic projects. This is a set of one PIC unit and one 2MHz "Cera-lock" oscillator. The PIC will be wrapped in aluminum foil for static electricity protection. ◆ The PIC has a "electronic flasher" program written on it (circuit diagram in photo 7). When you connect a battery, 12 LEDs will light up sequentially in one direction. Pressing the push button (push switch) will reverse the direction of the flow. ◆ Recommended for those who are not yet able to program or write to a PIC, but want to experience PIC electronic projects. ◆ As shown in the photos (8 and 9), it has been tested in a breadboard setup. All input/output ports (I/O) are working correctly. ◆ The PIC is a used item that has been programmed and operated several times. Therefore, the pins (legs) may be slightly weakened. Also, the top is slightly marked with a magic pen. ◆ The items for sale are only the PIC unit and the "Cera-lock" oscillator. Electronic components such as the breadboard and resistors in the photos are not included. Please prepare them at your local electronics store or online retailer (such as Akizuki Denshi Tsusho https://akizukidenshi.com/catalog/default.aspx).