SQUARE WAVE GENERATOR

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Here is the schematic for my first finished signal generator! I am really excited to finish my first project within a single month! I learned LOTS of things with this project!

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

COMPONENTS LIST:

9v Battery
SPST Switch (On/Off Switch)
SPDT Switch (Settings Switch)
MOM (ON) Switch (Push to Make)
IC1 - 7805 5v Regulator
IC2 - 40106 Hex Inverter
C1 - 0.1uF Capacitor
R1 - 100K Potentiometer
R2 - 100K Potentiometer
R3 - 10K Resistor
Output - 1/4" Audio Connector




HERES MY FIRST RECORDING WITH THE NEW SIGNAL GENERATOR!

FIRST PROJECT

This is my first attempt to create an oscillator, using a schematic that I found at hackaday.com .

ITEM LIST:

IC1 - 7805 5V Voltage Regulator
IC2 - 40106 Hex Inverter
R2 - 100K Potentiometer
C1 - 0.1uF Capacitor
9V Battery Clip
9V Battery
3.5mm Audio Connector





I built it on a solderless breadboard and sent the output signal into my keyboard amp. The finished oscillator sounded like this : listen here

Although it looks simple, it took me forever to figure out how this works. Where the schematics says IC2P, the ground from the IC2 is connected, as well as the ground from the audio connector. What also took forever to figure out was that the Voltage Regular has the three wires arranged positive, negative, ground and not positive, ground, negative as I expected.

I also dont quite understand the 7 and 14 behind the VSS and VDD. The ground on the IC2 comes from the 7 pin, but the supply comes from the 8 pin, not 14. The oscillator actually makes a different sound when connected to different pins between 8-14. Does anyone know why this is? I don't see how it changes the resistance.