Enclosure not stated · 3 knobs
Univox/Shin Ei UD-50 Uni Drive w Aion "Monad" modsVerified
Based on the Univox Uni-Drive UD-50· 1 other board clones it
From the post
This one has been modified for regular stompbox use and more useful controls. Also a feedback trimpot has been added to achieve more gain on tap. Aion's Monad projects suggest a 10k trimpot but I suggest a much larger value to be able to turn it into a heavy high gain fuzz.
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 21 rows
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Check before you build · 1 value the reader of this layout was not sure of
- Transistors: three bodies drawn (around E5, D9 and H5) but the legend says only 'Q1-Q2: 2N3904'; all three entered as 2N3904
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 8 | ||||
| ×2 | 10K | 10k | read from the layout by eye | |
| ×2 | 100K | 100k | read from the layout by eye | |
| ×1 | 3.9K | 3.9k | read from the layout by eye | |
| ×1 | 3.3K | 3.3k | read from the layout by eye | |
| ×1 | 150K | 150k | read from the layout by eye | |
| ×1 | 100Ω | 100 | read from the layout by eye | |
| ×1 | 8.2K | 8.2k | read from the layout by eye | |
| R2 | 2K | 2k | legend: 2K or 7,5K; read from the layout by eye | |
| Capacitors 7 | ||||
| ×1 | 100nF | 100n | read from the layout by eye | |
| ×1 | 39pF | 39p | read from the layout by eye | |
| ×1 | 1nF | 1n | read from the layout by eye | |
| ×1 | 4.7nF | 4.7n | read from the layout by eye | |
| ×4 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×1 | 47uF | 47u | electrolytic; read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| D1 | 1N5817 | 1N5817 | read from the layout by eye | |
| Transistors 1 | ||||
| ×3 | 2N3904 | 2N3904 | legend: Q1-Q2: 2N3904, 2N2222 etc.; 2SC859 in original; three drawn; read from the layout by eye | |
| Potentiometers 3 | ||||
| Gain | B500K | B500k | Potentiometer | read from the layout by eye |
| Tone | B100K | B100k | Potentiometer | read from the layout by eye |
| Volume | A10K | A10k | Potentiometer | read from the layout by eye |
| Trimmers 1 | ||||
| ×1 | 100K | 100k | read from the layout by eye | |
Other boards based on the Univox Uni-Drive UD-50
- Monad Aion FX · 125B · $12.50