I made LED flash circuit which is often used as the PIC software making practice.
This circuit controls the blink of eight LEDs with the software of PIC.
The blinking pattern can be changed with five switches.

Pattern 1
Pattern 2
Pattern 3
Pattern 4
Pattern 5

Specification
PIC	PIC16F84A
Processor Frequency	10MHz
LED	High brightness LED x 8
Blink pattern	Five kinds

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Hardware Circuit drawing Pattern drawing Circuit explanation Parts explanation		Software Flow chart List Processing explanation Debugging