Function Generator Ready To print pcb

Partts list:

• LM324 op amp chip
• 2 10KΩ resistors
• 4 100KΩ resistrs
• 22KΩ resistor
• 220KΩ resistor
• 1μF ceramic capacitor
• 33nF ceramic capacitor
• 10nF ceramic capacitor
• 100KΩ potentiometer

this circuit need positive with negative power source in addition with GND or 0 volt .

computer power supply can afford +12 and -12 volts for this circuit but make sure it's not connected to mother board while this experiment 

circuit layout

PCB

on breadboard

the original schematic 

Download

source: http://adf.ly/1foxxX