Enclosure not stated · 3 knobs
UMI Buzztone & Volume ExpanderVerified
Based on the UMI Buzztone & Volume Expander
Schematic
This is a board layout, a drawing of where each part goes, and the post may link the schematic it was drawn from. Open the layout at Dirtbox Layouts. No KiCad fragment has been drawn for this circuit yet.
Parts list 14 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 3 | ||||
| ×3 | 1M | 1M | read from the layout by eye | |
| ×2 | 4.7K | 4.7k | read from the layout by eye | |
| ×1 | 27K | 27k | read from the layout by eye | |
| Capacitors 4 | ||||
| ×3 | 2.2nF | 2.2n | read from the layout by eye | |
| ×2 | 150nF | 150n | read from the layout by eye | |
| ×1 | 6.8nF | 6.8n | read from the layout by eye | |
| ×1 | 10uF | 10u | electrolytic; read from the layout by eye | |
| Diodes 2 | ||||
| D1 | Germanium | GERMANIUM | type only, no part number given; read from the layout by eye | |
| D2 | 1N5817 | 1N5817 | read from the layout by eye | |
| Transistors 2 | ||||
| Q1 | PNP Germanium | PNP GERMANIUM | type only, no part number given; read from the layout by eye | |
| Q2 | PNP Germanium | PNP GERMANIUM | type only, no part number given; read from the layout by eye | |
| Potentiometers 3 | ||||
| Volume | B100K | B100k | Potentiometer | try 200kB for more output and gain; read from the layout by eye |
| Buzz | B100K | B100k | Potentiometer | try 200kB for more output and gain; read from the layout by eye |
| Contour | B100K | B100k | Potentiometer | read from the layout by eye |