PIC12F675 mikrokontroller produces 1MHz, 100KHz, 10KHz, 1KHz square wave signal.

Use of signal forming circuit on output:

 

PIC pinouts:

 

1. +5V                            8. 0V

2. Quartz 20MHz          7. LED0

3. Quartz 20MHz          6. LED1

4. switch (set frq.)         5. square wave output

 

                1MHz    100KHz        10KHz        1KHz

LED0        5V            0V                5V            0V

LED1        5V            5V                0V            0V

 

Download HEX file to PIC12F675