Quick and less-dirty audio test oscillator

Quick and less-dirty audio test oscillator

Project description

I use this sine generator when I need to debug a project using an audio probe. Before building this, I had to strum my guitar and then quickly probe my project before the guitar signal was dead.

Verification status

Verified! I built one and it peeps happily at around 783Hz.


Schematic and project info: http://www.geofex.com/FX_images/q&dosc.pdf

Bill of materials

R1: 22R
R2: 9.1K
R3: 910R
R4: 4.7K
R5: 4.7K
R6: 100R
R7: 27K
R8: 27K
C1: 100nF
C2: 100nF
C3: 100nF
C4: 10nF
C5: 10nF
C6: 22nF
C7: 10nF
D1: ?
D2: ?
Q1: 2N3904
Q2: 2N3904
1 jumper wires
7 trace cuts


Click here to see the bill-of-materials as a list or download it as a comma separated values file (.csv).


BB Forum code
HTML code