Quick and less-dirty audio test oscillator
Posted Mon, 2012-06-25 21:21 by Harold
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
Schematic and project info: http://www.geofex.com/FX_images/q&dosc.pdf
Bill of materials
| Resistors | |
|---|---|
| R1: 22R | |
| R2: 9.1K | |
| R3: 910R | |
| R4: 4.7K | |
| R5: 4.7K | |
| R6: 100R | |
| R7: 27K | |
| R8: 27K | |
| Capacitors | |
|---|---|
| C1: 100nF | |
| C2: 100nF | |
| C3: 100nF | |
| C4: 10nF | |
| C5: 10nF | |
| C6: 22nF | |
| C7: 10nF | |
| Diodes | |
|---|---|
| D1: ? | |
| D2: ? | |
| Transistors | |
|---|---|
| Q1: 2N3904 | |
| Q2: 2N3904 | |
| 1 jumper wires |
| 7 trace cuts |
List
Click here to see the bill-of-materials as a list or download it as a comma separated values file (.csv).
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